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Water system · PWSID OH0904012

HAMILTON PUBLIC WATER SYSTEM

FAIRFIELD, OH · ~62,447 people served

Check your exact address → FAIRFIELD overview
84
Good
PurityRadar safety score

PWSID

OH0904012

State

Ohio

City

FAIRFIELD

Population served

62,447

Primary source

Groundwater

Score history

▼ 16 points — the score moved from 100 to 84 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 84

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Nov 2024). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

5.3 ppt

limit 4 ppt

Above EPA limit · 1.3×

PFHxS

Perfluorohexanesulfonic acid

4.1 ppt

limit 10 ppt

Below EPA limit

PFBS

3.6 ppt

limit —

No federal limit

Violations & enforcement

14

Violations on record

1

Unaddressed

7

Health-based

49

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2025. Official EPA record →

Other · EPA contaminant 7000 began Dec 2025 Unaddressed
Other · EPA contaminant 7000 began Dec 2019 Resolved
Other · EPA contaminant 7000 began Jan 2019 Resolved
Monitoring & reporting · EPA contaminant 1009 began Jun 2005 Resolved
Monitoring & reporting · EPA contaminant 1009 began Apr 2005 Resolved
Monitoring & reporting · Gross alpha began Jan 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1994 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1993 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1992 Resolved

Recent enforcement actions

  • State action · SIA Dec 2025
  • State action · SOX Jun 2020
  • State action · SIA Dec 2019
  • State action · SOX Jul 2019
  • State action · SIA Jan 2019
  • State action · SOX Feb 2008
  • State action · SOX Apr 2007
  • State action · SOX Apr 2007

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Nov 2020

0.94 · max 0.94 mg/l as N · 2

Arsenic

1 station · latest Nov 2020

0.14 · max 0.14 ug/l · 1

Atrazine

1 station · latest Nov 2020

11.9 · max 11.9 ng/l · 1

Fluoride

1 station · latest Nov 2020

0.05 · max 0.05 mg/l · 1

Manganese

1 station · latest Nov 2020

0.58 · max 0.58 ug/l · 1

Uranium

1 station · latest Nov 2020

0.224 · max 0.224 ug/l · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system OH0904012 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.