NORWALK WATER SUPPLY

NORWALK, IA · ~14,334 people served

Check your exact address → NORWALK overview

100

Excellent

PurityRadar safety score

PWSID

IA9164078

State

Iowa

City

NORWALK

Population served

14,334

Primary source

SWP

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

13,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2012. Official EPA record →

Monitoring & reporting · Total coliform began Aug 2011 Resolved

Monitoring & reporting · Total coliform began Oct 2003 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2003 Resolved

Monitoring & reporting · Total coliform began Aug 2001 Resolved

Monitoring & reporting · Total coliform began Dec 1999 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1992 Resolved

Monitoring & reporting · Total coliform began Oct 1990 Resolved

Recent enforcement actions

State action · SOX Jul 2012
State action · SFJ Apr 2012
State action · SIE Oct 2011
State action · SFJ Oct 2011
State action · SOX Sep 2011
State action · SOX Apr 2004
State action · SIF Dec 2003
State action · SFJ Nov 2003

This profile is built from EPA public records for system IA9164078 — 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.