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Water system · PWSID OH7400614

AQUA OHIO - TIFFIN

MARION, OH · ~20,279 people served

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

PWSID

OH7400614

State

Ohio

City

MARION

Population served

20,279

Primary source

Surface water

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 Jul 2024). Levels in parts per trillion (ppt).

Lithium

10,600 ppt

limit —

No federal limit

Violations & enforcement

11

Violations on record

1

Unaddressed

7

Health-based

30

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2019. Official EPA record →

Other · EPA contaminant 7000 began Dec 2019 Unaddressed
Monitoring & reporting · EPA contaminant 0600 began Jan 2010 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2008 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2008 Resolved
Max contaminant level (MCL) · Nitrate health-based began Dec 2002 Resolved
Treatment technique · EPA contaminant 0200 health-based began Dec 1993 Resolved
Treatment technique · EPA contaminant 0200 health-based began Nov 1993 Resolved
Treatment technique · EPA contaminant 0200 health-based began Oct 1993 Resolved
Treatment technique · EPA contaminant 0200 health-based began Sep 1993 Resolved
Treatment technique · EPA contaminant 0200 health-based began Aug 1993 Resolved
Treatment technique · EPA contaminant 0200 health-based began Jul 1993 Resolved

Recent enforcement actions

  • State action · SIA Dec 2019
  • EPA/federal action · EOX Nov 2010
  • EPA/federal action · EFL Jan 2010
  • State action · SOX Feb 2008
  • State action · SIF Jan 2003
  • State action · SOX Dec 2002
  • State action · SIA Dec 2002
  • State action · SIE Dec 2002

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

Manganese

2 stations · latest Dec 2024

47.9 · max 55.2 ug/L · 7

Arsenic

1 station · latest Sep 2021

2.42 · max 2.72 ug/L · 6

Copper

2 stations · latest Dec 2024

3.16 · max 5.85 ug/L · 6

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 OH7400614 — 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.