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Water system · PWSID OH7003512

ONTARIO CITY

ONTARIO, OH · ~6,756 people served

Check your exact address → ONTARIO overview
100
Excellent
PurityRadar safety score

PWSID

OH7003512

State

Ohio

City

ONTARIO

Population served

6,756

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

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

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 2023). Levels in parts per trillion (ppt).

Lithium

12,600 ppt

limit —

No federal limit

Violations & enforcement

19

Violations on record

2

Unaddressed

0

Health-based

20

Enforcement actions

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

Reporting · EPA contaminant 5200 began Jul 2025 Unaddressed
Other · EPA contaminant 7000 began Dec 2018 Unaddressed
Other · EPA contaminant 7000 began Jul 2002 Resolved
Monitoring & reporting · Nitrate began Jul 1999 Resolved
Monitoring & reporting · Total coliform began Jan 1998 Resolved
Monitoring & reporting · Cyanide began Jan 1995 Resolved
Monitoring & reporting · Fluoride began Jan 1995 Resolved
Monitoring & reporting · Selenium began Jan 1995 Resolved
Monitoring & reporting · EPA contaminant 1036 began Jan 1995 Resolved
Monitoring & reporting · EPA contaminant 1094 began Jan 1995 Resolved
Monitoring & reporting · Beryllium began Jan 1995 Resolved
Monitoring & reporting · EPA contaminant 1075 began Jan 1995 Resolved

Recent enforcement actions

  • State action · SIA Oct 2025
  • State action · SIE Oct 2025
  • State action · SIA Dec 2018
  • State action · SOX Jul 2007
  • State action · SOX Apr 2007
  • State action · SIA Aug 2002
  • State action · SIF Apr 2000
  • State action · SOX Apr 2000

This profile is built from EPA public records for system OH7003512 — 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.