HAMILTON PUBLIC WATER (OH, OH0904012)

System Snapshot

Available system-level context

This snapshot shows the identity and context fields currently available for HAMILTON PUBLIC WATER SYSTEM (PWSID OH0904012). Read it with the source links and limitations below.

Last updated: August 2, 2026Data reviewed: August 2, 2026

System identity

PWSID: OH0904012
State: Ohio
Linked communities: Hamilton
County context: Not listed in current record
System type: Community water system
Source water: Groundwater from the Great Miami Buried Valley Aquifer
Population served: Not listed in current record
Service connections: Not listed in current record
Latest reviewed report: 2025 report link found
Data updated: 2026-08-02

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 HAMILTON PUBLIC WATER SYSTEM. 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 HAMILTON PUBLIC WATER SYSTEM
Substance and testing period	Reported value	Range in report	Limit or standard	Source table	Report-printed status
Chlorine dioxideTesting period: 2025	South Plant: 660; North Plant: 560 µg/LDetected	South Plant: 100 - 660; North Plant: 220 - 560	MCL: 800; MCLG: 800	RESIDUAL DISINFECTANTSPage 5	Violation: No, as printed for this sample period
ChloriteTesting period: 2025	South Plant: 0.68; North Plant: 0.57 mg/LDetected	South Plant: 0.45 - 0.70; North Plant: 0.41 - 0.68	MCL: 1.0; MCLG: 0.8	RESIDUAL DISINFECTANTSPage 5	Violation: No, as printed for this sample period

Report row

Chlorine dioxide

Range in report: South Plant: 100 - 660; North Plant: 220 - 560 µg/L
Detected: South Plant: 660; North Plant: 560 µg/L
Testing period: 2025
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 800; MCLG: 800
Report-printed status: Violation: No, as printed for this sample period

Report row

Chlorite

Range in report: South Plant: 0.45 - 0.70; North Plant: 0.41 - 0.68 mg/L
Detected: South Plant: 0.68; North Plant: 0.57 mg/L
Testing period: 2025
Sites above action level: Not applicable to this summarized entry
Limit or standard: MCL: 1.0; MCLG: 0.8
Report-printed status: Violation: No, as printed for this sample period

Source report notes

Source: Hamilton Public Water System 2025 Annual Water Quality Report. Retrieved 2026-08-02.

Applies to: Chlorine dioxide
The plant columns remain separate and no single systemwide value is synthesized. Annual-report values and printed status describe only the cited 2025 report or sample period. They are not a current compliance feed, advisory determination, address-level result, household-tap result, exposure conclusion, or safety conclusion. The reviewed relationship does not identify the provider for an address or prove exclusive service.
Applies to: Chlorite
0, MCLG 0.8, South Plant detected 0.68 and range 0.45 - 0.70, North Plant detected 0.57 and range 0.41 - 0.68, Violation No, sample year 2025. The plant columns remain separate. The row-level No is preserved beside, rather than reconciled with, the separate dated missed-monitoring notice. Annual-report values and printed status describe only the cited 2025 report or sample period. They are not a current compliance feed, advisory determination, address-level result, household-tap result, exposure conclusion, or safety conclusion. The reviewed relationship does not identify the provider for an address or prove exclusive service.

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 HAMILTON PUBLIC WATER SYSTEM. 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.

Hamilton 2025 report corrections and monitoring context: Official data snapshot August 2, 2026

Hamilton's 2025 report corrects its prior report: the North Plant Cyanide result should have been 11 ppb rather than ND, with a 2023 rather than 2024 sample year; Antimony, Alpha Emitters, and Combined Radium were included in the 2024 detected-contaminants table in error; and a required results-availability statement was omitted. The report says those errors did not affect quality or safety and that the water continued to meet applicable standards. That statement is preserved only as dated provider language; this site does not adopt it as a current safety or compliance conclusion. The same report separately says required daily chlorite monitoring at the South Water Plant plant tap was not completed on April 18, 2025 and that the supplier would take steps to ensure adequate future monitoring. The dated contexts remain beside the Chlorite row's printed Violation No without reconciliation. They do not establish current resolution, compliance, advisory status, a contaminant-level exceedance, household-tap conditions, exposure, or safety. Check the mutable official page for current instructions.

This is a point-in-time official regulatory data snapshot, not a live notice, current compliance conclusion, or tap-level safety conclusion. Open the official source , then open Check Hamilton boil advisories . The City page provides instructions, an emergency number, and notification methods but no live active/inactive list. It can change after the August 2 review and is not proof of current status or absence of another notice.

Official data reviewed 2026-08-02.

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 Chlorine dioxide and Chlorite from physical PDF page 5. Other report rows, health language, treatment descriptions, and lead or service-line context are not reproduced in the preview table.
Physical page 6 also corrects the prior report's North Plant Cyanide result and sample year, removes three erroneous table inclusions, and notes an omitted results-availability statement. The report's broad quality, safety, and standards sentence is retained only as dated provider language; it is not a current site conclusion and does not authorize additional row, violation-detail, or report-route publication.
Address-level service can vary. Confirm the serving provider with a bill, account portal, utility, city, or state source.
Each selected row prints Violation No for 2025. That field remains row/report-period context and is not converted into present-day compliance, advisory, exposure, household-tap, or safety language.
Physical page 6 separately reports missed daily chlorite monitoring at the South Water Plant on April 18, 2025. It remains prominent without reconciling it with the Chlorite row or calling it currently resolved, unresolved, or active.
The report's dated nothing-you-need-to-do and no-boil language is not current instruction. Check the mutable official City page for current instructions.
EPA lists Fairfield as the administrative city, while the exact-PWSID report and City utility page anchor the Hamilton relationship. The evidence does not prove exclusive service or identify the provider for an address.
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 HAMILTON PUBLIC WATER SYSTEM summarizes a past reporting period. It is not a live alert page.

Utility reportReport data updated: August 2, 2026

Annual Water Quality Report - Reporting Year 2025

Open 2025 water quality report

The 2025 report link is available for HAMILTON PUBLIC WATER SYSTEM. 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: Hamilton Public Water System 2025 Annual Water Quality Report
Source URL: Open report source
Source retrieved: 2026-08-02
Last reviewed: 2026-08-02

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: Hamilton
County context: Not listed in current record

Local Context

City and state context for this system

HAMILTON PUBLIC WATER SYSTEM is linked here to Hamilton 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: Hamilton
County context: Not listed in current record
State context: Ohio

Browse related context

County context is shown as a field when it appears in the current record. County pages are not currently available on this site.

Related Explainers

Related contaminants and guides

Use these explainers with HAMILTON PUBLIC WATER SYSTEM'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

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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

Detection vs. violation vs. advisory

A careful guide to three different water-record terms, what each one can mean, and what official source to check next.

View Detection vs. violation vs. advisory

What public water data can and cannot tell you

What official public water records can help you check, what they cannot prove, and why missing data needs cautious interpretation.

View What public water data can and cannot tell you

How to ask your water provider about testing

Focused questions to ask a utility or water provider about reports, testing, notices, PWSID, and where to verify official records.

View How to ask your water provider about testing

What a drinking water violation means

How to separate monitoring, reporting, treatment, and health-based violation language before drawing conclusions.

View What a drinking water violation means

No linked contaminant explainers shown

No linked contaminant explainer records are shown for this system in the current data. Use the official report source for the full report table.

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.

EPA data
HAMILTON PUBLIC WATER SYSTEM EPA Envirofacts identity row (opens official source)
Utility report
Hamilton Public Water System 2025 Annual Water Quality Report (opens official source)
Utility website
City of Hamilton Utilities About page (opens official source)
Utility website
Hamilton annual water-quality report index (opens official source)
Utility website
Hamilton boil advisories and instructions (opens official source)
State data
Ohio EPA Division of Drinking and Ground Waters (opens official source)

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