Report identity and source
- Public water system
- San Antonio Water System
- PWSID
- TX0150018
- Report year
- 2026
- Official publisher/source
- San Antonio Water System 2026 Water Quality Report
- Source retrieved
- 2026-07-23
- Last reviewed
- 2026-07-23
Reviewed Report Rows
58 reviewed rows from the 2026 report
Measurements, ranges, units, limit fields, status cells, likely-source wording, and table names remain scoped to the named annual-report rows.
Coliform bacteria
reported report rows grouped under their printed table heading.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Coliform Bacteria | Highest No. of Positive: 0.17 | Total No. of Positive E. coli or Fecal: 4 | 2024 | Not listed for this report row | MCLG: 0; Total Coliform MCL: 5% of monthly samples are positive; Fecal Coliform or E. coli or Fecal MCL: A routine sample and a repeat sample are total coliform positive, and one is also fecal coliform or E. coli positive. | Violation: No (row sample period) | 3 | Coliform Bacteria — Monitored in the Distribution System |
Report rowColiform Bacteria
Reported measurementHighest No. of Positive: 0.17
Range in reportTotal No. of Positive E. coli or Fecal: 4
Testing period in report2024
UnitNot listed for this report row
Limit or standard fieldMCLG: 0; Total Coliform MCL: 5% of monthly samples are positive; Fecal Coliform or E. coli or Fecal MCL: A routine sample and a repeat sample are total coliform positive, and one is also fecal coliform or E. coli positive.
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableColiform Bacteria — Monitored in the Distribution System
Lead and copper
reported report rows grouped under their printed table heading.
| Report row | Reported measurement | Sites above action level | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Copper | 90th Percentile: 0.187 | 0 | 2024 | ppm | MCLG: 1.3; AL: 1.3 | Violation: No (row sample period) | 3 | Lead and Copper — Monitoring Done at Customers' Taps |
| Lead | 90th Percentile: 1.6 | 0 | 2024 | ppb | MCLG: 0; AL: 15 | Violation: No (row sample period) | 3 | Lead and Copper — Monitoring Done at Customers' Taps |
Report rowCopper
Reported measurement90th Percentile: 0.187
Sites above action level0
Testing period in report2024
Unitppm
Limit or standard fieldMCLG: 1.3; AL: 1.3
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableLead and Copper — Monitoring Done at Customers' Taps
Report rowLead
Reported measurement90th Percentile: 1.6
Sites above action level0
Testing period in report2024
Unitppb
Limit or standard fieldMCLG: 0; AL: 15
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableLead and Copper — Monitoring Done at Customers' Taps
Disinfectants and disinfection by-products
reported report rows grouped under their printed table heading.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Haloacetic Acids (HAA5)* | Highest Level Detected: 30.6 | 0 – 30.6 | 2025 | ppb | MCLG: NA; MCL: 60 | Violation: No (row sample period) | 3 | Disinfectants and Disinfection By-Products |
| Total Trihalomethanes (TTHMs)* | Highest Level Detected: 86.2 | 0 – 86.2 | 2025 | ppb | MCLG: NA; MCL: 80 | Violation: No (row sample period) | 3 | Disinfectants and Disinfection By-Products |
Report rowHaloacetic Acids (HAA5)*
Reported measurementHighest Level Detected: 30.6
Range in report0 – 30.6
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 60
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableDisinfectants and Disinfection By-Products
Report rowTotal Trihalomethanes (TTHMs)*
Reported measurementHighest Level Detected: 86.2
Range in report0 – 86.2
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 80
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableDisinfectants and Disinfection By-Products
Inorganic contaminants
reported report rows grouped under their printed table heading.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Barium | Highest Level Detected: 0.125 | 0.024 – 0.125 | 2025 | ppm | MCLG: 2; MCL: 2 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Diethylhexyl Adipate | Highest Level Detected: 1.0 | <0.6 – 1.0 | 2025 | ppb | MCLG: 0.4; MCL: 0.4 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Dibromochloromethane | Highest Level Detected: 9.9 | <1.0 – 9.9 | 2025 | ppb | MCLG: NA; MCL: NA | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Fluoride | Highest Level Detected: 0.69 | <0.5 – 0.69 | 2025 | ppm | MCLG: 4; MCL: 4 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Nickel | Highest Level Detected: 0.004 | <0.001 – 0.004 | 2025 | ppm | MCLG: NA; MCL: NA | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Nitrate [measured as Nitrogen] | Highest Level Detected: 2.45 | <0.25 - 2.45 | 2025 | ppm | MCLG: 10; MCL: 10 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Nitrate-Nitrite | Highest Level Detected: 1.83 | 0.29 - 1.83 | 2025 | ppm | MCLG: 10; MCL: 10 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Selenium | Highest Level Detected: 3.1 | 0 - 3.1 | 2025 | ppb | MCLG: 50; MCL: 50 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Thallium, Total | Highest Level Detected: 0.61 | 0 - 0.61 | 2025 | ppb | MCLG: 0.5; MCL: 2 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
| Xylenes, Total | Highest Level Detected: 0.001 | 0 - 0.001 | 2025 | ppm | MCLG: 10; MCL: 10 | Violation: No (row sample period) | 3 | Inorganic Contaminants — Monitored at the Water Plants |
Report rowBarium
Reported measurementHighest Level Detected: 0.125
Range in report0.024 – 0.125
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 2; MCL: 2
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowDiethylhexyl Adipate
Reported measurementHighest Level Detected: 1.0
Range in report<0.6 – 1.0
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: 0.4; MCL: 0.4
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowDibromochloromethane
Reported measurementHighest Level Detected: 9.9
Range in report<1.0 – 9.9
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: NA
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowFluoride
Reported measurementHighest Level Detected: 0.69
Range in report<0.5 – 0.69
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 4; MCL: 4
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowNickel
Reported measurementHighest Level Detected: 0.004
Range in report<0.001 – 0.004
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: NA; MCL: NA
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowNitrate [measured as Nitrogen]
Reported measurementHighest Level Detected: 2.45
Range in report<0.25 - 2.45
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 10; MCL: 10
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowNitrate-Nitrite
Reported measurementHighest Level Detected: 1.83
Range in report0.29 - 1.83
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 10; MCL: 10
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowSelenium
Reported measurementHighest Level Detected: 3.1
Range in report0 - 3.1
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: 50; MCL: 50
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowThallium, Total
Reported measurementHighest Level Detected: 0.61
Range in report0 - 0.61
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: 0.5; MCL: 2
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Report rowXylenes, Total
Reported measurementHighest Level Detected: 0.001
Range in report0 - 0.001
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 10; MCL: 10
Status printed for this rowViolation: No (row sample period)
Source page3
Source tableInorganic Contaminants — Monitored at the Water Plants
Radioactive contaminants
reported report rows grouped under their printed table heading.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Combined Radium 226/228 | Highest Level Detected: 1.5 | 1.5 – 1.5 | 2025 | pCi/L | MCLG: 0; MCL: 5 | Violation: No (row sample period) | 4 | Radioactive Contaminants — Monitored at the Water Plants |
| Gross Alpha Excluding Radon and Uranium | Highest Level Detected: 0 | 0 – 0 | 2025 | pCi/L | MCLG: 0; MCL: 15 | Violation: No (row sample period) | 4 | Radioactive Contaminants — Monitored at the Water Plants |
| Uranium | Highest Level Detected: 1.7 | 0 – 1.7 | 2024 | µg/L | MCLG: 0; MCL: 30 | Violation: No (row sample period) | 4 | Radioactive Contaminants — Monitored at the Water Plants |
| Beta/photon Emitters | Highest Level Detected: 5.5 | 0 – 5.5 | 2023 | pCi/L** | MCLG: 0; MCL: 50 | Violation: No (row sample period) | 4 | Radioactive Contaminants — Monitored at the Water Plants |
Report rowCombined Radium 226/228
Reported measurementHighest Level Detected: 1.5
Range in report1.5 – 1.5
Testing period in report2025
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 5
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableRadioactive Contaminants — Monitored at the Water Plants
Report rowGross Alpha Excluding Radon and Uranium
Reported measurementHighest Level Detected: 0
Range in report0 – 0
Testing period in report2025
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 15
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableRadioactive Contaminants — Monitored at the Water Plants
Report rowUranium
Reported measurementHighest Level Detected: 1.7
Range in report0 – 1.7
Testing period in report2024
Unitµg/L
Limit or standard fieldMCLG: 0; MCL: 30
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableRadioactive Contaminants — Monitored at the Water Plants
Report rowBeta/photon Emitters
Reported measurementHighest Level Detected: 5.5
Range in report0 – 5.5
Testing period in report2023
UnitpCi/L**
Limit or standard fieldMCLG: 0; MCL: 50
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableRadioactive Contaminants — Monitored at the Water Plants
Residual disinfectant level
reported report rows grouped under their printed table heading.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Chlorine Residual, Free | Average Level: 1.46 | 0.16 – 3.7 | 2025 | ppm | MRDL: 4; MRDLG: 4 | Violation: No (row sample period) | 4 | Residual Disinfectant Level — Monitored in the Distribution System |
Report rowChlorine Residual, Free
Reported measurementAverage Level: 1.46
Range in report0.16 – 3.7
Testing period in report2025
Unitppm
Limit or standard fieldMRDL: 4; MRDLG: 4
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableResidual Disinfectant Level — Monitored in the Distribution System
UCMR 5 detected unregulated contaminants
reported report rows grouped under their printed table heading.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Source page | Source table |
|---|---|---|---|---|---|---|
| Lithium | Average Level: 15.6 | 13.1 – 17.2 | 2025 | ppb | 4 | UCMR 5 Results — Detected Unregulated Contaminants |
Report rowLithium
Reported measurementAverage Level: 15.6
Range in report13.1 – 17.2
Testing period in report2025
Unitppb
Source page4
Source tableUCMR 5 Results — Detected Unregulated Contaminants
GBRA Western Canyon — disinfection by-products
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Haloacetic Acids (HAA5)* | Highest Level Detected: 23.9 | 23.9 – 23.9 | 2025 | ppb | MCLG: NA; MCL: 60 | Violation: No (row sample period) | 4 | GBRA Western Canyon Water Supply — Disinfectants and Disinfection By-Products |
| Total Trihalomethanes (TTHMs)* | Highest Level Detected: 71.3 | 71.3 – 71.3 | 2025 | ppb | MCLG: NA; MCL: 80 | Violation: No (row sample period) | 4 | GBRA Western Canyon Water Supply — Disinfectants and Disinfection By-Products |
Report rowHaloacetic Acids (HAA5)*
Reported measurementHighest Level Detected: 23.9
Range in report23.9 – 23.9
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 60
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableGBRA Western Canyon Water Supply — Disinfectants and Disinfection By-Products
Report rowTotal Trihalomethanes (TTHMs)*
Reported measurementHighest Level Detected: 71.3
Range in report71.3 – 71.3
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 80
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableGBRA Western Canyon Water Supply — Disinfectants and Disinfection By-Products
GBRA Western Canyon — inorganic contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Barium | Highest Level Detected: 0.0258 | 0.0258 – 0.0258 | 2025 | ppm | MCLG: 2; MCL: 2 | Violation: No (row sample period) | 4 | GBRA Western Canyon Water Supply — Inorganic Contaminants |
| Fluoride | Highest Level Detected: 0.22 | 0.22 – 0.22 | 2025 | ppm | MCLG: 4; MCL: 4 | Violation: No (row sample period) | 4 | GBRA Western Canyon Water Supply — Inorganic Contaminants |
| Nitrate (measured as Nitrogen) | Highest Level Detected: 0.06 | 0.06 – 0.06 | 2025 | ppm | MCLG: 10; MCL: 10 | Violation: No (row sample period) | 4 | GBRA Western Canyon Water Supply — Inorganic Contaminants |
Report rowBarium
Reported measurementHighest Level Detected: 0.0258
Range in report0.0258 – 0.0258
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 2; MCL: 2
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableGBRA Western Canyon Water Supply — Inorganic Contaminants
Report rowFluoride
Reported measurementHighest Level Detected: 0.22
Range in report0.22 – 0.22
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 4; MCL: 4
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableGBRA Western Canyon Water Supply — Inorganic Contaminants
Report rowNitrate (measured as Nitrogen)
Reported measurementHighest Level Detected: 0.06
Range in report0.06 – 0.06
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 10; MCL: 10
Status printed for this rowViolation: No (row sample period)
Source page4
Source tableGBRA Western Canyon Water Supply — Inorganic Contaminants
GBRA Western Canyon — turbidity
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Highest Single Measurement | Level Detected: 0.09 NTU | Highest single measurement | Report-period result | NTU | Limit: 1 NTU | Violation: No (row report period) | 4 | GBRA Western Canyon Water Supply — Turbidity |
| Lowest Monthly % Meeting Limit | Level Detected: 100% | Lowest monthly percentage meeting limit | Report-period result | % | Limit: 0.3 NTU | Violation: No (row report period) | 4 | GBRA Western Canyon Water Supply — Turbidity |
Report rowHighest Single Measurement
Reported measurementLevel Detected: 0.09 NTU
Range in reportHighest single measurement
Testing period in reportReport-period result
UnitNTU
Limit or standard fieldLimit: 1 NTU
Status printed for this rowViolation: No (row report period)
Source page4
Source tableGBRA Western Canyon Water Supply — Turbidity
Report rowLowest Monthly % Meeting Limit
Reported measurementLevel Detected: 100%
Range in reportLowest monthly percentage meeting limit
Testing period in reportReport-period result
Unit%
Limit or standard fieldLimit: 0.3 NTU
Status printed for this rowViolation: No (row report period)
Source page4
Source tableGBRA Western Canyon Water Supply — Turbidity
Vista Ridge — disinfection by-products
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Haloacetic Acids (HAA5)* | Highest Level Detected: 0 | 0 | 2025 | ppb | MCLG: NA; MCL: 60 | Violation: No (row sample period) | 5 | Vista Ridge LLC — Disinfectants and Disinfection By-Products |
| Total Trihalomethanes (TTHMs)* | Highest Level Detected: 4 | 4 – 4.4 | 2025 | ppb | MCLG: NA; MCL: 80 | Violation: No (row sample period) | 5 | Vista Ridge LLC — Disinfectants and Disinfection By-Products |
Report rowHaloacetic Acids (HAA5)*
Reported measurementHighest Level Detected: 0
Range in report0
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 60
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Disinfectants and Disinfection By-Products
Report rowTotal Trihalomethanes (TTHMs)*
Reported measurementHighest Level Detected: 4
Range in report4 – 4.4
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 80
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Disinfectants and Disinfection By-Products
Vista Ridge — inorganic contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Barium | Highest Level Detected: 0.0945 | 0.0945 - 0.0945 | 2023 | ppm | MCLG: 2; MCL: 2 | Violation: No (row sample period) | 5 | Vista Ridge LLC — Inorganic Contaminants |
| Dibromochloromethane | Highest Level Detected: 3.7 | 1.8 - 3.7 | 2025 | ppb | MCLG: NA; MCL: NA | Violation: No (row sample period) | 5 | Vista Ridge LLC — Inorganic Contaminants |
| Fluoride | Highest Level Detected: 0.21 | 0.21 – 0.21 | 2023 | ppm | MCLG: 4; MCL: 4 | Violation: No (row sample period) | 5 | Vista Ridge LLC — Inorganic Contaminants |
Report rowBarium
Reported measurementHighest Level Detected: 0.0945
Range in report0.0945 - 0.0945
Testing period in report2023
Unitppm
Limit or standard fieldMCLG: 2; MCL: 2
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Inorganic Contaminants
Report rowDibromochloromethane
Reported measurementHighest Level Detected: 3.7
Range in report1.8 - 3.7
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: NA
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Inorganic Contaminants
Report rowFluoride
Reported measurementHighest Level Detected: 0.21
Range in report0.21 – 0.21
Testing period in report2023
Unitppm
Limit or standard fieldMCLG: 4; MCL: 4
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Inorganic Contaminants
Vista Ridge — radioactive contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Gross Alpha Excluding Radon and Uranium | Highest Level Detected: 3.9 | 3.9 – 3.9 | 2023 | pCi/L | MCLG: 0; MCL: 15 | Violation: No (row sample period) | 5 | Vista Ridge LLC — Radioactive Contaminants |
| Combined Radium 226/228 | Highest Level Detected: 1.16 | 1.16 – 1.16 | 2023 | pCi/L | MCLG: 0; MCL: 5 | Violation: No (row sample period) | 5 | Vista Ridge LLC — Radioactive Contaminants |
Report rowGross Alpha Excluding Radon and Uranium
Reported measurementHighest Level Detected: 3.9
Range in report3.9 – 3.9
Testing period in report2023
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 15
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Radioactive Contaminants
Report rowCombined Radium 226/228
Reported measurementHighest Level Detected: 1.16
Range in report1.16 – 1.16
Testing period in report2023
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 5
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Radioactive Contaminants
Vista Ridge — residual disinfectant
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Chlorine Residual, Free | Average Level: 1.47 | 1.19 – 2.10 | 2025 | ppm | MRDL: 4; MRDLG: 4 | Violation: No (row sample period) | 5 | Vista Ridge LLC — Residual Disinfectant Level |
Report rowChlorine Residual, Free
Reported measurementAverage Level: 1.47
Range in report1.19 – 2.10
Testing period in report2025
Unitppm
Limit or standard fieldMRDL: 4; MRDLG: 4
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableVista Ridge LLC — Residual Disinfectant Level
Schertz-Seguin — disinfection by-products
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Haloacetic Acids (HAA5)* | Highest Level Detected: 0 | 0 | 2025 | ppb | MCLG: NA; MCL: 60 | Violation: No (row sample period) | 5 | Schertz-Seguin Local Government Corporation — Disinfectants and Disinfection By-Products |
| Total Trihalomethanes (TTHMs)* | Highest Level Detected: 4 | 4 – 4.4 | 2025 | ppb | MCLG: NA; MCL: 80 | Violation: No (row sample period) | 5 | Schertz-Seguin Local Government Corporation — Disinfectants and Disinfection By-Products |
Report rowHaloacetic Acids (HAA5)*
Reported measurementHighest Level Detected: 0
Range in report0
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 60
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableSchertz-Seguin Local Government Corporation — Disinfectants and Disinfection By-Products
Report rowTotal Trihalomethanes (TTHMs)*
Reported measurementHighest Level Detected: 4
Range in report4 – 4.4
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 80
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableSchertz-Seguin Local Government Corporation — Disinfectants and Disinfection By-Products
Schertz-Seguin — inorganic contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Barium | Highest Level Detected: 0.117 | 0.117 - 0.117 | 2025 | ppm | MCLG: 2; MCL: 2 | Violation: No (row sample period) | 5 | Schertz-Seguin Local Government Corporation — Inorganic Contaminants |
| Dibromochloromethane | Highest Level Detected: 1.8 | 1.8 - 1.8 | 2025 | ppb | MCLG: NA; MCL: NA | Violation: No (row sample period) | 5 | Schertz-Seguin Local Government Corporation — Inorganic Contaminants |
| Fluoride | Highest Level Detected: <0.5 | 0 | 2025 | ppm | MCLG: 4; MCL: 4 | Violation: No (row sample period) | 5 | Schertz-Seguin Local Government Corporation — Inorganic Contaminants |
Report rowBarium
Reported measurementHighest Level Detected: 0.117
Range in report0.117 - 0.117
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 2; MCL: 2
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableSchertz-Seguin Local Government Corporation — Inorganic Contaminants
Report rowDibromochloromethane
Reported measurementHighest Level Detected: 1.8
Range in report1.8 - 1.8
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: NA
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableSchertz-Seguin Local Government Corporation — Inorganic Contaminants
Report rowFluoride
Reported measurementHighest Level Detected: <0.5
Range in report0
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 4; MCL: 4
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableSchertz-Seguin Local Government Corporation — Inorganic Contaminants
Schertz-Seguin — residual disinfectant
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Chlorine Residual, Free | Average Level: 1.7 | 1.2 – 2.1 | 2025 | ppm | MRDL: 4; MRDLG: 4 | Violation: No (row sample period) | 5 | Schertz-Seguin Local Government Corporation — Residual Disinfectant Level |
Report rowChlorine Residual, Free
Reported measurementAverage Level: 1.7
Range in report1.2 – 2.1
Testing period in report2025
Unitppm
Limit or standard fieldMRDL: 4; MRDLG: 4
Status printed for this rowViolation: No (row sample period)
Source page5
Source tableSchertz-Seguin Local Government Corporation — Residual Disinfectant Level
CRWA Wells Ranch — disinfection by-products
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Haloacetic Acids (HAA5)* | Highest Level Detected: 0 | 0.0 - 0.0 | 2025 | ppb | MCLG: NA; MCL: 60 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Disinfectants and Disinfection By-Products |
| Total Trihalomethanes (TTHMs)* | Highest Level Detected: 9 | 0.00 - 68.4 | 2025 | ppb | MCLG: NA; MCL: 80 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Disinfectants and Disinfection By-Products |
Report rowHaloacetic Acids (HAA5)*
Reported measurementHighest Level Detected: 0
Range in report0.0 - 0.0
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 60
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Disinfectants and Disinfection By-Products
Report rowTotal Trihalomethanes (TTHMs)*
Reported measurementHighest Level Detected: 9
Range in report0.00 - 68.4
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 80
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Disinfectants and Disinfection By-Products
CRWA Wells Ranch — inorganic contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Barium | Highest Level Detected: 0.082 | 0.001 - 2 | 2025 | ppm | MCLG: 2; MCL: 2 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Inorganic Contaminants |
| Fluoride | Highest Level Detected: < 0.5 | 0.5 - 4.0 | 2025 | ppb | MCLG: 4; MCL: 4.0 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Inorganic Contaminants |
| Nitrate [measured as Nitrogen] | Highest Level Detected: < 0.25 | 0.25 - 10 | 2025 | ppm | MCLG: 10; MCL: 10.0 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Inorganic Contaminants |
Report rowBarium
Reported measurementHighest Level Detected: 0.082
Range in report0.001 - 2
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 2; MCL: 2
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Inorganic Contaminants
Report rowFluoride
Reported measurementHighest Level Detected: < 0.5
Range in report0.5 - 4.0
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: 4; MCL: 4.0
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Inorganic Contaminants
Report rowNitrate [measured as Nitrogen]
Reported measurementHighest Level Detected: < 0.25
Range in report0.25 - 10
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 10; MCL: 10.0
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Inorganic Contaminants
CRWA Wells Ranch — radioactive contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Alpha Emitters | Highest Level Detected: < 3.0 | 3.0 - 15 | 2024 | pCi/L | MCLG: 0; MCL: 15 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Radioactive Contaminants |
| Radium 228 | Highest Level Detected: < 1.0 | 1.0 - 5 | 2023 | pCi/L | MCLG: 0; MCL: 5 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Radioactive Contaminants |
Report rowAlpha Emitters
Reported measurementHighest Level Detected: < 3.0
Range in report3.0 - 15
Testing period in report2024
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 15
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Radioactive Contaminants
Report rowRadium 228
Reported measurementHighest Level Detected: < 1.0
Range in report1.0 - 5
Testing period in report2023
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 5
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Radioactive Contaminants
CRWA Wells Ranch — residual disinfectant
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Chlorine Residual, Free | Average Level: 2.32 | 1.89 - 3.20 | 2025 | ppm | MRDL: 4; MRDLG: 4 | Violation: No (row sample period) | 6 | CRWA Wells Ranch — Residual Disinfectant Level |
Report rowChlorine Residual, Free
Reported measurementAverage Level: 2.32
Range in report1.89 - 3.20
Testing period in report2025
Unitppm
Limit or standard fieldMRDL: 4; MRDLG: 4
Status printed for this rowViolation: No (row sample period)
Source page6
Source tableCRWA Wells Ranch — Residual Disinfectant Level
CRWA Lake Dunlap — disinfection by-products
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Haloacetic Acids (HAA5)* | Highest Level Detected: 16.8 | 32.6 - 71.7 | 2025 | ppb | MCLG: NA; MCL: 60 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Disinfectants and Disinfection By-Products |
| Total Trihalomethanes (TTHMs)* | Highest Level Detected: 53.9 | 41.5 - 68.4 | 2025 | ppb | MCLG: NA; MCL: 80 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Disinfectants and Disinfection By-Products |
Report rowHaloacetic Acids (HAA5)*
Reported measurementHighest Level Detected: 16.8
Range in report32.6 - 71.7
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 60
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Disinfectants and Disinfection By-Products
Report rowTotal Trihalomethanes (TTHMs)*
Reported measurementHighest Level Detected: 53.9
Range in report41.5 - 68.4
Testing period in report2025
Unitppb
Limit or standard fieldMCLG: NA; MCL: 80
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Disinfectants and Disinfection By-Products
CRWA Lake Dunlap — inorganic contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Barium | Highest Level Detected: 0.04 | 0.00 - 2.0 | 2025 | ppm | MCLG: 2; MCL: 2 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Inorganic Contaminants |
| Fluoride | Highest Level Detected: < 0.5 | 0.5 - 4.0 | 2025 | ppm | MCLG: 4; MCL: 4.0 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Inorganic Contaminants |
| Nitrate [measured as Nitrogen] | Highest Level Detected: 0.97 | 0.01 - 10 | 2025 | ppm | MCLG: 10; MCL: 10.0 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Inorganic Contaminants |
Report rowBarium
Reported measurementHighest Level Detected: 0.04
Range in report0.00 - 2.0
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 2; MCL: 2
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Inorganic Contaminants
Report rowFluoride
Reported measurementHighest Level Detected: < 0.5
Range in report0.5 - 4.0
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 4; MCL: 4.0
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Inorganic Contaminants
Report rowNitrate [measured as Nitrogen]
Reported measurementHighest Level Detected: 0.97
Range in report0.01 - 10
Testing period in report2025
Unitppm
Limit or standard fieldMCLG: 10; MCL: 10.0
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Inorganic Contaminants
CRWA Lake Dunlap — radioactive contaminants
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Alpha Emitters | Highest Level Detected: < 3.0 | NA | 2023 | pCi/L | MCLG: 0; MCL: 15 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Radioactive Contaminants |
| Radium 228 | Highest Level Detected: < 1.0 | NA | 2023 | pCi/L | MCLG: 0; MCL: 5 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Radioactive Contaminants |
Report rowAlpha Emitters
Reported measurementHighest Level Detected: < 3.0
Range in reportNA
Testing period in report2023
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 15
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Radioactive Contaminants
Report rowRadium 228
Reported measurementHighest Level Detected: < 1.0
Range in reportNA
Testing period in report2023
UnitpCi/L
Limit or standard fieldMCLG: 0; MCL: 5
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Radioactive Contaminants
CRWA Lake Dunlap — residual disinfectant
reported purchased-water results kept separate from the main-system tables.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Limit or standard field | Status printed for this row | Source page | Source table |
|---|---|---|---|---|---|---|---|---|
| Chlorine Residual, Free | Average Level: 2.32 | 1.58 - 3.6 | 2025 | ppm | MRDL: 4; MRDLG: 4 | Violation: No (row sample period) | 7 | CRWA Lake Dunlap — Residual Disinfectant Level |
Report rowChlorine Residual, Free
Reported measurementAverage Level: 2.32
Range in report1.58 - 3.6
Testing period in report2025
Unitppm
Limit or standard fieldMRDL: 4; MRDLG: 4
Status printed for this rowViolation: No (row sample period)
Source page7
Source tableCRWA Lake Dunlap — Residual Disinfectant Level
Coliform Bacteria
- Likely source listed in report
- Naturally present in the environment
- Source table
- Coliform Bacteria — Monitored in the Distribution System
Preservation and source notes
- reported 2024 table row transcribed from linked report page 3. It remains separate from page 1's statement about no E. coli positives in 2025; neither is presented as current status.
Copper
- Likely source listed in report
- Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives
- Source table
- Lead and Copper — Monitoring Done at Customers' Taps
Preservation and source notes
- reported 2024 action-level row transcribed from linked report page 3. It does not describe a specific household tap, service line, or current condition.
Lead
- Likely source listed in report
- Corrosion of household plumbing systems; erosion of natural deposits
- Source table
- Lead and Copper — Monitoring Done at Customers' Taps
Preservation and source notes
- reported 2024 action-level row transcribed from linked report page 3. It does not describe a specific household tap, service line, or current condition.
Haloacetic Acids (HAA5)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Total Trihalomethanes (TTHMs)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 3. The source prints Highest Level Detected 86.2, MCL 80, and Violation No. All three fields are preserved without deriving a compliance conclusion.
Barium
- Likely source listed in report
- Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Diethylhexyl Adipate
- Likely source listed in report
- Discharge from chemical factories
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. The source prints Highest Level Detected 1.0 ppb, MCLG 0.4, MCL 0.4, and Violation No. All printed fields are preserved without correction and without deriving an exceedance, violation, current-compliance, or safety conclusion.
Dibromochloromethane
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Fluoride
- Likely source listed in report
- Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Nickel
- Likely source listed in report
- Corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Nitrate [measured as Nitrogen]
- Likely source listed in report
- Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Nitrate-Nitrite
- Likely source listed in report
- Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Selenium
- Likely source listed in report
- Discharge from petroleum and metal refineries; erosion of natural deposits; discharge from mines
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Thallium, Total
- Likely source listed in report
- Leaching from ore-processing sites; discharge from electronics, glass, and drug factories
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Xylenes, Total
- Likely source listed in report
- Discharge from petroleum factories; discharge from chemical factories
- Source table
- Inorganic Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 3. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Combined Radium 226/228
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Radioactive Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Gross Alpha Excluding Radon and Uranium
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Radioactive Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Uranium
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Radioactive Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Beta/photon Emitters
- Likely source listed in report
- Decay of man-made and natural deposits
- Source table
- Radioactive Contaminants — Monitored at the Water Plants
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Chlorine Residual, Free
- Likely source listed in report
- Water additive used to control microbes
- Source table
- Residual Disinfectant Level — Monitored in the Distribution System
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Lithium
- Likely source listed in report
- Not listed for this report row
- Source table
- UCMR 5 Results — Detected Unregulated Contaminants
Preservation and source notes
- reported UCMR 5 row transcribed from linked report page 4. The printed value 10 is a non-regulatory health-based reference concentration, not an MCL or a printed violation finding.
Haloacetic Acids (HAA5)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- GBRA Western Canyon Water Supply — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Total Trihalomethanes (TTHMs)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- GBRA Western Canyon Water Supply — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Barium
- Likely source listed in report
- Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
- Source table
- GBRA Western Canyon Water Supply — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Fluoride
- Likely source listed in report
- Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories
- Source table
- GBRA Western Canyon Water Supply — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Nitrate (measured as Nitrogen)
- Likely source listed in report
- Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
- Source table
- GBRA Western Canyon Water Supply — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Highest Single Measurement
- Likely source listed in report
- Soil runoff
- Source table
- GBRA Western Canyon Water Supply — Turbidity
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Lowest Monthly % Meeting Limit
- Likely source listed in report
- Soil runoff
- Source table
- GBRA Western Canyon Water Supply — Turbidity
Preservation and source notes
- reported row transcribed from linked report page 4. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Haloacetic Acids (HAA5)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Vista Ridge LLC — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Total Trihalomethanes (TTHMs)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Vista Ridge LLC — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 5. The source prints Highest Level Detected 4 and range 4 – 4.4; both are preserved without correction.
Barium
- Likely source listed in report
- Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
- Source table
- Vista Ridge LLC — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Dibromochloromethane
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Vista Ridge LLC — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Fluoride
- Likely source listed in report
- Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories
- Source table
- Vista Ridge LLC — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Gross Alpha Excluding Radon and Uranium
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Vista Ridge LLC — Radioactive Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Combined Radium 226/228
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Vista Ridge LLC — Radioactive Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Chlorine Residual, Free
- Likely source listed in report
- Water additive used to control microbes
- Source table
- Vista Ridge LLC — Residual Disinfectant Level
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Haloacetic Acids (HAA5)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Schertz-Seguin Local Government Corporation — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Total Trihalomethanes (TTHMs)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Schertz-Seguin Local Government Corporation — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 5. The source prints Highest Level Detected 4 and range 4 – 4.4; both are preserved without correction.
Barium
- Likely source listed in report
- Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
- Source table
- Schertz-Seguin Local Government Corporation — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Dibromochloromethane
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Schertz-Seguin Local Government Corporation — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Fluoride
- Likely source listed in report
- Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories
- Source table
- Schertz-Seguin Local Government Corporation — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 5. The source prints a single 0 in Concentration Range Found; it is preserved literally.
Chlorine Residual, Free
- Likely source listed in report
- Water additive used to control microbes
- Source table
- Schertz-Seguin Local Government Corporation — Residual Disinfectant Level
Preservation and source notes
- reported row transcribed from linked report page 5. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Haloacetic Acids (HAA5)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- CRWA Wells Ranch — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 6. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Total Trihalomethanes (TTHMs)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- CRWA Wells Ranch — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 6. The source prints Highest Level Detected 9 and range 0.00 - 68.4; both are preserved without correction.
Barium
- Likely source listed in report
- Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
- Source table
- CRWA Wells Ranch — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 6. The source prints Concentration Range Found 0.001 - 2; it is preserved literally.
Fluoride
- Likely source listed in report
- Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories
- Source table
- CRWA Wells Ranch — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 6. The source prints unit ppb with MCL 4.0 and range 0.5 - 4.0. The values and unit are preserved literally and not normalized.
Nitrate [measured as Nitrogen]
- Likely source listed in report
- Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
- Source table
- CRWA Wells Ranch — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 6. The source prints Concentration Range Found 0.25 - 10; it is preserved literally.
Alpha Emitters
- Likely source listed in report
- Erosion of natural deposits
- Source table
- CRWA Wells Ranch — Radioactive Contaminants
Preservation and source notes
- reported row transcribed from linked report page 6. The source prints Concentration Range Found 3.0 - 15; it is preserved literally.
Radium 228
- Likely source listed in report
- Erosion of natural deposits
- Source table
- CRWA Wells Ranch — Radioactive Contaminants
Preservation and source notes
- reported row transcribed from linked report page 6. The source prints Concentration Range Found 1.0 - 5; it is preserved literally.
Chlorine Residual, Free
- Likely source listed in report
- Water additive used to control microbes
- Source table
- CRWA Wells Ranch — Residual Disinfectant Level
Preservation and source notes
- reported row transcribed from linked report page 6. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Haloacetic Acids (HAA5)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- CRWA Lake Dunlap — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 7. The source prints Highest Level Detected 16.8 and range 32.6 - 71.7. The apparent mismatch is preserved literally and not corrected.
Total Trihalomethanes (TTHMs)*
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- CRWA Lake Dunlap — Disinfectants and Disinfection By-Products
Preservation and source notes
- reported row transcribed from linked report page 7. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Barium
- Likely source listed in report
- Discharge from drilling wastes; discharge from metal refineries; erosion of natural deposits
- Source table
- CRWA Lake Dunlap — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 7. The source prints Concentration Range Found 0.00 - 2.0; it is preserved literally.
Fluoride
- Likely source listed in report
- Erosion of natural deposits; water additive which promotes strong teeth; discharge from fertilizer and aluminum factories
- Source table
- CRWA Lake Dunlap — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 7. The source prints Concentration Range Found 0.5 - 4.0; it is preserved literally.
Nitrate [measured as Nitrogen]
- Likely source listed in report
- Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
- Source table
- CRWA Lake Dunlap — Inorganic Contaminants
Preservation and source notes
- reported row transcribed from linked report page 7. The source prints Concentration Range Found 0.01 - 10; it is preserved literally.
Alpha Emitters
- Likely source listed in report
- Erosion of natural deposits
- Source table
- CRWA Lake Dunlap — Radioactive Contaminants
Preservation and source notes
- reported row transcribed from linked report page 7. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Radium 228
- Likely source listed in report
- Erosion of natural deposits
- Source table
- CRWA Lake Dunlap — Radioactive Contaminants
Preservation and source notes
- reported row transcribed from linked report page 7. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Chlorine Residual, Free
- Likely source listed in report
- Water additive used to control microbes
- Source table
- CRWA Lake Dunlap — Residual Disinfectant Level
Preservation and source notes
- reported row transcribed from linked report page 7. Printed fields describe the row sample period and are not a present-day safety or compliance conclusion.
Report Context
Context attributed to the source report
These summaries are limited to the named annual report and do not assert live system, compliance, or advisory status.
Report identity and period
The official 2026 SAWS report identifies San Antonio Water System and PWS ID TX 0150018. It says the report uses 2025 data from the most recent required tests, while individual tables also print earlier collection years.
Source-water context printed by SAWS
The report lists groundwater from the Edwards, Carrizo, Simsboro, Trinity, and Wilcox aquifers and, in some areas, surface water from Canyon Lake. It also names six purchased-water sources. Tables are printed for GBRA Western Canyon, Vista Ridge, Schertz-Seguin, and two Canyon Regional Water Authority sources, Wells Ranch and Lake Dunlap; Oliver Ranch and Texas Water Supply Co. have no printed result section, so no rows are inferred for them.
Secondary constituent results
The report discusses taste, color, and odor constituents and points readers to Texas Drinking Water Watch. It does not print secondary-constituent values in this PDF, so none are invented here.
Lead and service-line inventory context
The report provides general lead guidance and describes SAWS inspection and inventory options for eligible or unknown service-line records. It does not establish a particular property's line material or tap result.
Special notice
The report includes general guidance for people who may be more vulnerable to microbial contaminants and directs readers to health-care providers and the Safe Drinking Water Hotline. It is not a detection or current advisory statement.
Printed 2025 violations statement
SAWS prints a 2025 violation count of zero. The statement is retained only as report-period context.
Definitions
The report defines regulatory terms and units used in its tables. The definitions are reproduced as report-reading context, not as an interpretation of any row.
State water-loss audit statement
The report prints a 2025 combined water-loss estimate for all SAWS public water systems. The value is not assigned to TX0150018 on this page.
Definitions printed in this report
- AL
- Action Level: the concentration which, if exceeded, triggers treatment or other requirements.
- ALG
- Action Level Goal: the level below which there is no known or expected risk to health, allowing a margin of safety.
- Avg
- Average; the report notes regulatory compliance with some MCLs is based on a running annual average.
- Level 1 Assessment
- A study of a water system to identify potential problems and determine why total coliform bacteria were found, if possible.
- Level 2 Assessment
- A detailed study triggered by specified E. coli or repeated total-coliform conditions described by the report.
- MCL
- Maximum Contaminant Level: the highest level of a contaminant allowed in drinking water.
- MCLG
- Maximum Contaminant Level Goal: the level below which there is no known or expected risk to health, allowing a margin of safety.
- MFL
- Million fibers per liter, a measure of asbestos.
- MRDL
- Maximum Residual Disinfectant Level: the highest level of a disinfectant allowed in drinking water.
- MRDLG
- Maximum Residual Disinfectant Level Goal: the level below which there is no known or expected risk to health.
- mrem
- Millirems per year, a measure of radiation absorbed by the body.
- MRL
- Minimum Reporting Level: the lowest concentration laboratories may report to EPA for UCMR data.
- NA
- Not applicable.
- ND
- Not detected.
- NTU
- Nephelometric turbidity units, a measure of turbidity.
- pCi/L
- Picocuries per liter, a measure of radioactivity.
- ppb
- Parts per billion or micrograms per liter (µg/L).
- ppm
- Parts per million or milligrams per liter (mg/L).
- ppq
- Parts per quadrillion or picograms per liter (pg/L).
- ppt
- Parts per trillion or nanograms per liter (ng/L).
- TT
- Treatment Technique: a required process intended to reduce the level of a contaminant.
- µmhos/cm
- Micromhos per centimeter, a measure of conductivity.
How to read a water quality report
A plain-English walkthrough of Consumer Confidence Reports, including report years, detected contaminants, legal limits, violations, and source notes.
View How to read a water quality reportReport Disclosures
Source-period disclosures kept separate from live status
These items preserve report wording and scope. They do not create violation records, advisory records, or a current-status conclusion.
Report-period scope
This page presents the official report's printed periods, including 2023, 2024, and 2025 results. It does not determine present-day safety, compliance, advisory, or household-tap conditions.
Current status is not asserted. Check official current sources for notices or instructions.
Source-assessment wording
The report first says no source-water susceptibility assessment has been conducted, then refers to information contained in the assessment. This page preserves that ambiguity and does not resolve it by inference.
Current status is not asserted. Check official current sources for notices or instructions.
Household and service-line scope
The report's lead and inventory information does not establish a specific home's service-line material, eligibility, plumbing condition, or tap result.
Current status is not asserted. Check official current sources for notices or instructions.
Bacteria statements use different periods
Page 1 states no E. coli positives in 2025. The page 3 coliform row is dated 2024 and prints 4 in a separate positive-count column. The two source statements are not merged into a current conclusion.
Current status is not asserted. Check official current sources for notices or instructions.
Report-period violations statement
The report states that the SAWS system had a 2025 violation count of zero. This is attributed only to the printed report period and is not a claim about current compliance or notices.
Current status is not asserted. Check official current sources for notices or instructions.
Purchased-water scope
Purchased-water rows remain grouped under the supplier headings printed by SAWS. They are not relabeled as main-system plant results or address-level source assignments.
Current status is not asserted. Check official current sources for notices or instructions.
Combined SAWS water-loss scope
The page 8 water-loss figure is explicitly a combined estimate for all SAWS public water systems, not a value assigned only to TX0150018.
Current status is not asserted. Check official current sources for notices or instructions.
Evidence
Official report and system source paths
Use official federal, state, utility, or report sources before treating a page as final.
Utility report
Report identity and field provenance
- Annual report document: San Antonio Water System 2026 Water Quality Report Eight-page PDF; SHA-256 7d35606246ac7a564c9a195cec66810753a8164cb1a6b6ce5ef138ea8fc359e3.
- System name and PWSID: San Antonio Water System 2026 Water Quality Report Every source page identifies San Antonio Water System and PWS ID Number TX 0150018.
- Report year and printed data periods: San Antonio Water System 2026 Water Quality Report The 2026 report says it uses 2025 data from the most recent required tests; individual rows retain their printed 2023, 2024, or 2025 periods.
San Antonio Water System profile
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How this report summary is handled
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Methodology
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View MethodologyLimitations
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