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Water system · PWSID OH3000603

GUERNSEY CO. WATER DEPT.

CAMBRIDGE, OH · ~8,891 people served

Check your exact address → CAMBRIDGE overview
67
Fair
PurityRadar safety score

PWSID

OH3000603

State

Ohio

City

CAMBRIDGE

Population served

8,891

Primary source

SWP

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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 Aug 2025). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

9.8 ppt

limit 4 ppt

Above EPA limit · 2.4×

Lithium

9,700 ppt

limit —

No federal limit

Violations & enforcement

7

Violations on record

1

Unaddressed

4

Health-based

24

Enforcement actions

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

Other · EPA contaminant 7000 began Nov 2025 Unaddressed
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2024 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2017 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2017 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2017 Resolved
Monitoring & reporting · EPA contaminant 1094 began May 2004 Resolved
Other · EPA contaminant 7000 began Jul 2002 Resolved

Recent enforcement actions

  • State action · SIA Nov 2025
  • State action · SOX Aug 2024
  • State action · SIF Jun 2024
  • State action · SIE Jun 2024
  • State action · SIA Jun 2024
  • State action · SFL Dec 2018
  • State action · SOX Mar 2018
  • State action · SIF Feb 2018

This profile is built from EPA public records for system OH3000603 — 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.