Home/ Directory/ CA/ NORWALK - CITY, WATER DEPT.

Water system · PWSID CA1910191

NORWALK - CITY, WATER DEPT.

NORWALK, CA · ~20,283 people served

Check your exact address → NORWALK overview
50
Fair
PurityRadar safety score

PWSID

CA1910191

State

California

City

NORWALK

Population served

20,283

Primary source

SWP

Score history

▼ 50 points — the score moved from 100 to 50 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 50

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

PFOS

Perfluorooctanesulfonic acid

22 ppt

limit 4 ppt

Above EPA limit · 5.5×

PFOA

Perfluorooctanoic acid

4.9 ppt

limit 4 ppt

Above EPA limit · 1.2×

PFHxS

Perfluorohexanesulfonic acid

7.3 ppt

limit 10 ppt

Near EPA limit

Lithium

26,000 ppt

limit —

No federal limit

PFBA

5.5 ppt

limit —

No federal limit

PFPeA

3.4 ppt

limit —

No federal limit

Violations & enforcement

1

Violations on record

0

Unaddressed

1

Health-based

2

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 1999. Official EPA record →

Max contaminant level (MCL) · EPA contaminant 2980 health-based began Jan 1999 Resolved

Recent enforcement actions

  • State action · SOX Nov 1999
  • State action · SFL Nov 1999

This profile is built from EPA public records for system CA1910191 — 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.