Report identity and source
- Public water system
- Gallup Water System
- PWSID
- NM3508317
- Report year
- 2025
- Official publisher/source
- City of Gallup 2025 Water Quality Report
- Source retrieved
- 2026-07-10
- Last reviewed
- 2026-07-10
Reviewed Report Rows
Nine reviewed rows from the 2025 report
Measurements, ranges, units, limit fields, status cells, likely-source wording, and table names remain scoped to the named annual-report rows.
Regulated Substances
Six reported rows from the report's Regulated Substances table.
| 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 |
|---|---|---|---|---|---|---|---|---|
| Nitrates | Amount Detected: 0.11 | Range: 0.06-0.11 | 2025 | ppm | MCL: 10; MCLG: 0 | Violation: No (row sample period) | 2 | Regulated Substances |
| Alpha Emitters | Amount Detected: 2.8 | Range: 2.8-2.8 | 2025 | pCi/L | MCL: 15; MCLG: 0 | Violation: No (row sample period) | 2 | Regulated Substances |
| Chlorine (as Cl2) | Amount Detected: 1 | Range: 0.7-1 | 2025 | ppm | MRDL (printed under MCL): 4; MRDLG (printed under MCLG): 4 | Violation: No (row sample period) | 2 | Regulated Substances |
| Haloacetic Acids (HAA5) | Amount Detected: 2 | Range: 1.8-2.17 | 2025 | ppb | MCL: 60; MCLG column: N/A | Violation: No (row sample period) | 2 | Regulated Substances |
| Total Trihalomethanes (HAA5) | Amount Detected: 42 | Range: 18-41.6 | 2025 | ppb | MCL: 80; MCLG column: N/A | Violation: No (row sample period) | 2 | Regulated Substances |
| Radium | Amount Detected: 1.22 | Range: 1.22-1.22 | 2025 | pCi/L | MCL: 5; MCLG: 0 | Violation: No (row sample period) | 2 | Regulated Substances |
Copper and Lead
Two reported action-level rows printed with a 2023 sampling year in the 2025 report.
| 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 | Amount Detected: 0.04 | 0 | 2023 | ppm | Action Level: 1.3; MCLG: 1.3 | Violation: No (row sample period) | 2 | Copper & Lead |
| Lead | Amount Detected: 0.001 | 0 | 2023 | ppm | Action Level: 15; MCLG: 0.0 | Violation: No (row sample period) | 2 | Copper & Lead |
UCMR5
One reported Lithium row with the report's separate Amount Detected and Range cells preserved exactly; the source prints no unit.
| Report row | Reported measurement | Range in report | Testing period in report | Unit | Source page | Source table |
|---|---|---|---|---|---|---|
| Lithium | Amount Detected: 28.8 - 40.9 | ND - 9 | 2023 | Not listed for this report row | 2 | UCMR5 |
Nitrates
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Regulated Substances
Preservation and source notes
- The row prints Year Sampled 2025 and is listed as printed.
Alpha Emitters
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Regulated Substances
Preservation and source notes
- The row prints Year Sampled 2025 and is preserved as printed.
Chlorine (as Cl2)
- Likely source listed in report
- Water additive used to control microbes
- Source table
- Regulated Substances
Preservation and source notes
- The row prints Year Sampled 2025 and is listed as printed.
- Table note: The source table prints the 4 and 4 values beneath generic MCL and MCLG headers. This summary labels them MRDL and MRDLG to preserve the disinfectant-standard semantics used for this chlorine row.
Haloacetic Acids (HAA5)
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Regulated Substances
Preservation and source notes
- The source prints N/A in the MCLG comparison column; no MCLG value is inferred.
Total Trihalomethanes (HAA5)
- Likely source listed in report
- By-product of drinking water disinfection
- Source table
- Regulated Substances
Preservation and source notes
- The source prints Total Trihalomethanes (HAA5), Amount Detected 42, and Range 18-41.6.
- Table note: The source labels this row Total Trihalomethanes (HAA5). The anomalous HAA5 label is preserved rather than silently corrected.
Radium
- Likely source listed in report
- Erosion of natural deposits
- Source table
- Regulated Substances
Preservation and source notes
- The likely-source cell ends with the anomalous trailing text No.
- Table note: The source prints a trailing No after the likely-source text in addition to the row's Violation No cell. The extra trailing text is preserved as a source anomaly, not a second status field.
Copper
- Likely source listed in report
- Corrosion of household plumbing systems; Erosion of natural deposits
- Source table
- Copper & Lead
Preservation and source notes
- The row prints Year Sampled 2023, Action Level 1.3, fused MCLG1.3 text, Amount Detected 0.04, and Sites Above Action Level 0.
- Table note: The source visually fuses the MCLG header with Copper's printed 1.3 value as MCLG1.3. The action level and MCLG values are preserved in their intended columns with the fused source text documented.
Lead
- Likely source listed in report
- Corrosion of household plumbing systems; Erosion of natural deposits
- Source table
- Copper & Lead
Preservation and source notes
- The row prints Year Sampled 2023, Action Level 15, MCLG 0.0, Amount Detected 0.001, Sites Above Action Level 0, and unit ppm.
- Table note: The source prints the Lead unit as ppm. It is preserved without conversion or normalization.
Lithium
- Likely source listed in report
- Not listed for this report row
- Source table
- UCMR5
Preservation and source notes
- The source prints Amount Detected 28.8 - 40.9 and Range ND - 9 in separate columns with no unit column. Neither string is parsed, normalized, swapped, or treated as a status.
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 and testing period
The report says it covers testing performed from January 1 through December 31, 2025 and includes the most recent available year for substances monitored less often. Copper, Lead, and Lithium are printed with a 2023 sampling year.
Source Water Assessment
The 2025 report says the Source Water Assessment Plan assigned the system a medium susceptibility rating. This is source-assessment context, not a contaminant detection or current notice.
Arsenic context in the report
The 2025 report states that Gallup drinking water met EPA's arsenic standard and contained low levels of arsenic. This is the report's statement, not a current compliance determination; no arsenic result row is rendered.
Lead context in the report
The report associates lead with service lines and home plumbing. It does not describe conditions at every tap, and this summary does not repeat household instructions from the annual report.
Source water described in the report
The 2025 report describes Gallup's source water as groundwater produced from 16 wells tapping the Gallup Sandstone and Dakota-Westwater aquifers. This is report context, not a live source-water inventory.
Consumer Confidence Rule disclosure scope
The report includes a Consumer Confidence Rule disclosure about CCR adequacy, availability, or content. Its printed dates are preserved in the disclosure below without asserting current status.
Ground Water Rule disclosure scope
The report includes a Ground Water Rule disclosure and response narrative. The printed begin and blank end are preserved below without inferring whether the item is open or resolved.
Definitions used on this page
The definition block reproduces only source definitions relevant to the nine rendered rows. Other definitions in the report were reviewed but are not reproduced here.
Lithium source fields
The report's UCMR5 Lithium row prints Year Sampled 2023, Amount Detected 28.8 - 40.9, and Range ND - 9. The report prints no unit, criterion, or status for this row. The page keeps the Amount Detected and Range strings in separate labeled fields without parsing or reinterpretation.
Definitions printed in this report
- Action Level
- The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
- MCL (Maximum Contaminant Level)
- The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
- MCLG (Maximum Contaminant Level Goal)
- The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
- MRDL (Maximum Residual Disinfectant Level)
- The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
- MRDLG (Maximum Residual Disinfectant Level Goal)
- The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
- NA
- Not applicable.
- ND (Not detected)
- Indicates that the substance was not found by laboratory analysis.
- pCi/L (picocuries per liter)
- A measure of the radioactivity in water.
- ppb (parts per billion)
- One part by weight of analyte to 1 billion parts by weight of the water sample.
- ppm (parts per million)
- One part by weight of analyte to 1 million parts by weight of the water sample.
How to read a water quality report
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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.
CCR Adequacy/Availability/Content
The source report's violations table lists the Consumer Confidence Rule item CCR Adequacy/Availability/Content, with printed begin and end values of 10/01/2024 and 03/04/2025. This concerns annual-report adequacy, availability, or content; it is not a contaminant-result exceedance or a live advisory. No current compliance or status conclusion is made.
- Begin printed in report
- 10/01/2024
- End printed in report
- 03/04/2025
Current status is not asserted. Check official current sources for notices or instructions.
Failure to resolve significant deficiencies
In the source report's Ground Water Rule section, the City says it did not correct the cited deficiencies by the deadline established by NMED WPCEB. The report describes cleaning and inspection of eight referenced tanks and consultation with the State about a corrective-action plan. These statements are attributed to the source report only. The blank printed end cell does not establish whether the item is open or resolved, and no current household or boil-water instruction is provided here.
- Begin printed in report
- 02/09/26
- End printed in report
- Blank in source report
Current status is not asserted. Check official current sources for notices or instructions.
Evidence
Official report and system source paths
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Utility report
Report identity and field provenance
- Official report document: City of Gallup 2025 Water Quality Report Verified as a four-page PDF with SHA-256 55f8b2a6b7f8d3b7846a061aace719ed4f0385ded5abee892a5d13fc98e49c6a.
- PWSID NM3508317: City of Gallup 2025 Water Quality Report The PWSID is printed on report pages 2 and 4.
- Report year and testing period: City of Gallup 2025 Water Quality Report The report identifies 2025 and states a January 1 through December 31, 2025 testing period.
Gallup Water System profile
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How this report summary is handled
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Methodology
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