Public water system profile

WILMINGTON WATER DEPARTMENT

Explore available public water records for WILMINGTON WATER DEPARTMENT (PWSID DE0000663). Find annual reports, results listed in those reports, official sources, and clear notes about what the records can and cannot show. This page does not show conditions at a specific tap.

View report rows

System Snapshot

Available system-level context

This snapshot shows the identity and context fields currently available for WILMINGTON WATER DEPARTMENT (PWSID DE0000663). Read it with the source links and limitations below.

Last updated: Data reviewed:

System identity

PWSID
DE0000663
State
Delaware
Linked communities
Wilmington
County context
Not listed in current record
System type
Not listed in current record
Source water
Surface water from the Brandywine Creek watershed
Population served
Not listed in current record
Service connections
Not listed in current record
Latest reviewed report
2025 report link found
Data updated
2026-07-19

Read these as system-level fields from reviewed public records. Confirm provider and address-specific questions with official utility, city, state, or EPA sources.

Report-Listed Rows

Report-listed rows summarized from the latest reviewed report

2 report-listed rows are summarized for WILMINGTON WATER DEPARTMENT. A listed row is not the same thing as a current advisory or household tap result.

Report year
2025
Rows summarized
2
Source tables represented
1
Scope
Past reporting period
Report-row preview from the latest reviewed report for WILMINGTON WATER DEPARTMENT
Substance and testing periodReported valueRange in reportLimit or standardSource tableReport-printed status
Total TrihalomethanesTesting period: 202560 ppbHighest Detected Level (highest LRAA)6 - 85MCL: 80; MCLG: no goal for the totalTABLE 2: WATER QUALITY RESULTS - DETECTED PRIMARY PARAMETERS AT ENTRY POINTS TO DISTRIBUTION SYSTEMPage 4Typical source, as printed: Byproduct of drinking water disinfection. Forms due to reaction of chlorine with total organic carbon.Violation: No, as printed for this report period
Haloacetic AcidsTesting period: 202537 ppbHighest Detected Level (highest LRAA)10 - 53MCL: 60; MCLG: no goal for the totalTABLE 2: WATER QUALITY RESULTS - DETECTED PRIMARY PARAMETERS AT ENTRY POINTS TO DISTRIBUTION SYSTEMPage 4Typical source, as printed: Byproduct of drinking water disinfection. Forms due to reaction of chlorine with total organic carbon.Violation: No, as printed for this report period

Report row

Total Trihalomethanes

Range in report
6 - 85 ppb
Highest Detected Level (highest LRAA)
60 ppb
Testing period
2025
Sites above action level
Not applicable to this summarized entry
Limit or standard
MCL: 80; MCLG: no goal for the total
Report-printed status
Violation: No, as printed for this report period

Source · Page 4

TABLE 2: WATER QUALITY RESULTS - DETECTED PRIMARY PARAMETERS AT ENTRY POINTS TO DISTRIBUTION SYSTEM

Typical source, as printed: Byproduct of drinking water disinfection. Forms due to reaction of chlorine with total organic carbon.

Report row

Haloacetic Acids

Range in report
10 - 53 ppb
Highest Detected Level (highest LRAA)
37 ppb
Testing period
2025
Sites above action level
Not applicable to this summarized entry
Limit or standard
MCL: 60; MCLG: no goal for the total
Report-printed status
Violation: No, as printed for this report period

Source · Page 4

TABLE 2: WATER QUALITY RESULTS - DETECTED PRIMARY PARAMETERS AT ENTRY POINTS TO DISTRIBUTION SYSTEM

Typical source, as printed: Byproduct of drinking water disinfection. Forms due to reaction of chlorine with total organic carbon.

Source report notes

Source: City of Wilmington Water Quality Report 2025. Retrieved 2026-07-19.

  • Applies to: Total Trihalomethanes

    The individual-results range reaches 85 ppb, while the source's MCL comparison uses the separately printed highest LRAA of 60 ppb and prints Violation: No. The range is not converted into a site-created violation or current conclusion.

  • Applies to: Total Trihalomethanes, Haloacetic Acids

    Table note: The cited highest value is the highest Locational Running Annual Average (LRAA). The MCL is based on the LRAA; the range is the range of individual 2025 results.

  • Applies to: Haloacetic Acids

    The source prints an individual-results range of 10-53 ppb, a highest LRAA of 37 ppb, and Violation: No. These values describe the 2025 reporting period only.

Review the linked source report for definitions, footnotes, and official wording.

Violation Records

Violation records shown on this page

This section shows 0 system-scoped violation detail records currently included for WILMINGTON WATER DEPARTMENT. Annual reports and current notices can use different timing and terminology.

No system-scoped violation detail records are included in the available reviewed records for this system. This is not an official compliance finding. Check the official utility, state, or EPA source for current compliance and notice information.

Source notes for this system mention violation-related context, but this page does not currently display separate system-scoped violation detail records.

Important limitation

Profile summary note

This page summarizes public records reviewed by this site. It does not replace official notices, utility updates, or state drinking water information.

System profile limitations

  • The bounded preview shows only Total Trihalomethanes and HAA5 from the 2025 report. Both rows print Violation: No for the report period; that status is not a current compliance, advisory, or tap-level conclusion.
  • The Total Trihalomethanes individual-results range reaches 85 ppb, while the separately printed highest locational running annual average is 60 ppb and is the metric compared with the 80 ppb MCL. The range is not converted into a site-created violation.
  • The report's other regulated, unregulated, radioactive, secondary, lead/copper, and treatment rows are not reproduced. Its broad annual compliance statement is not repeated as a current conclusion.
  • Wilmington Water's June 4, 2026 Drought Watch asks for voluntary conservation in its service area. It is separate from annual water-quality results and is not a boil-water, do-not-drink, contamination, or mandatory-restriction notice.
  • The Wilmington relationship supports navigation only. Confirm the provider for a particular address with a bill, Wilmington Water, or the Delaware DPH system record.
  • Address-level service can vary. Confirm the serving provider with a bill, account portal, utility, city, or state source.
  • This page shows summarized entries from the available report. It does not include a complete contaminant or violation table.
  • Missing fields are not findings. They mean the field is not shown on this page from the records currently available.
  • This page summarizes available public records. It may not include every update, notice, or urgent official advisory.

Latest Reviewed Report

Latest reviewed report found by this site

The 2025 report found for WILMINGTON WATER DEPARTMENT summarizes a past reporting period. It is not a live alert page.

Utility reportReport data updated:

City of Wilmington Water Quality Report 2025

Open 2025 water quality report

The 2025 report link is available for WILMINGTON WATER DEPARTMENT. Use the linked source report for the full table, definitions, footnotes, and official context. This page includes summarized entries from the available report. They are not a complete copy of the report table.

Report year
2025
Summarized entries shown
2
Source name
City of Wilmington Water Quality Report 2025
Source URL
Open report source
Source retrieved
2026-07-19
Last reviewed
2026-07-19

Use the linked source report for the full table, definitions, footnotes, and official context.

Data coverage

This page summarizes selected public records for this public water system. It may not include every report, update, current notice, or address-level service detail.

Latest reviewed report
2025 report link found
Report-listed rows
2 summarized report entries shown
Detailed violation records
No detailed system-scoped records displayed
Population served
Not listed in current record
Service connections
Not listed in current record
City context
Wilmington
County context
Not listed in current record

Local Context

City and state context for this system

WILMINGTON WATER DEPARTMENT is linked here to Wilmington for navigation. That relationship does not confirm the provider for a specific address; use a bill, utility portal, or official lookup source.

Linked local context

Linked communities
Wilmington
County context
Not listed in current record
State context
Delaware

Related Explainers

Related contaminants and guides

Use these explainers with WILMINGTON WATER DEPARTMENT's report year, source table, and official report. Links are limited to existing guide and contaminant pages.

How to look up your drinking water system

Start with a utility bill, PWSID, state lookup tool, or official report so you can find the public water system behind a city or provider name.

View How to look up your drinking water system

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 report

Corrections

Suggest a correction or newer source

If you have a newer official report, utility source, or correction, send the source link for review. This helps keep profile summaries tied to public records.

Suggest an update

Evidence

Official sources and report links

Use official federal, state, utility, or report sources before treating a page as final.

Data methodology

Review source hierarchy, missing-data handling, and record limitations.

View Data methodology

Data limitations

See why limited records, missing fields, and current notices need careful interpretation.

View Data limitations