Home/ Directory/ OH/ MID-OHIO WSD WATER DISTRICT 1

Water system · PWSID OH4901012

MID-OHIO WSD WATER DISTRICT 1

COLUMBUS, OH · ~5,176 people served

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

PWSID

OH4901012

State

Ohio

City

COLUMBUS

Population served

5,176

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

Lithium

13,000 ppt

limit —

No federal limit

Violations & enforcement

11

Violations on record

2

Unaddressed

1

Health-based

23

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 Sep 2023 Unaddressed
Monitoring · Lead & Copper Rule began Aug 2019 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2015 Resolved
Monitoring & reporting · Total coliform began Nov 2014 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jul 2002 Resolved
Monitoring & reporting · EPA contaminant 2051 began Jul 2002 Resolved
Monitoring & reporting · EPA contaminant 2050 began Jul 2002 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jan 1996 Resolved
Monitoring & reporting · EPA contaminant 2051 began Jan 1996 Resolved
Monitoring & reporting · EPA contaminant 2050 began Jan 1996 Resolved

Recent enforcement actions

  • State action · SIA Oct 2025
  • State action · SIE Oct 2025
  • State action · SIA Sep 2023
  • State action · SIF Oct 2019
  • State action · SOX Sep 2019
  • State action · SIA Sep 2019
  • State action · SIE Sep 2019
  • State action · SIF Nov 2015

This profile is built from EPA public records for system OH4901012 — 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.