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Water system · PWSID ID4010097

MERIDIAN WATER DEPT

MERIDIAN, ID · ~147,340 people served

Check your exact address → MERIDIAN overview
91
Excellent
PurityRadar safety score

PWSID

ID4010097

State

Idaho

City

MERIDIAN

Population served

147,340

Primary source

Groundwater

Score history

▼ 9 points — the score moved from 100 to 91 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 91

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

PFOS

Perfluorooctanesulfonic acid

4.2 ppt

limit 4 ppt

Above EPA limit · 1.0×

PFHxS

Perfluorohexanesulfonic acid

3.8 ppt

limit 10 ppt

Below EPA limit

Lithium

9,690 ppt

limit —

No federal limit

Violations & enforcement

39

Violations on record

0

Unaddressed

0

Health-based

23

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2018. Official EPA record →

Monitoring & reporting · EPA contaminant 0999 began Jan 2016 Resolved
Monitoring & reporting · Total coliform began Jan 2016 Resolved
Monitoring & reporting · Nitrate began Jan 2016 Resolved
Monitoring & reporting · Combined radium-226/228 began Apr 2014 Resolved
Monitoring & reporting · EPA contaminant 2050 began Jan 2006 Resolved
Monitoring & reporting · Nitrate began Jan 1996 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 1995 Resolved
Monitoring & reporting · Nitrate began Jan 1995 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 1993 Resolved
Monitoring & reporting · EPA contaminant 2989 began Jan 1993 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 1993 Resolved
Monitoring & reporting · EPA contaminant 2982 began Jan 1993 Resolved

Recent enforcement actions

  • State action · SOX Nov 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Aug 2018
  • State action · SOX Feb 2017
  • State action · SIE Feb 2017
  • State action · SIA Feb 2017
  • State action · SIE May 2016

This profile is built from EPA public records for system ID4010097 — 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.