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

Water system · PWSID CA1910026

COMPTON-CITY, WATER DEPT.

COMPTON, CA · ~74,877 people served

Check your exact address → COMPTON overview

Fair

PurityRadar safety score

PWSID

CA1910026

State

California

City

COMPTON

Population served

74,877

Primary source

SWP

Score history

▼ 47 points — the score moved from 100 to 53 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 53

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

PFOS

Perfluorooctanesulfonic acid

14 ppt

limit 4 ppt

Above EPA limit · 3.5×

PFOA

Perfluorooctanoic acid

4.9 ppt

limit 4 ppt

Above EPA limit · 1.2×

PFHxS

Perfluorohexanesulfonic acid

4 ppt

limit 10 ppt

Below EPA limit

Lithium

58,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2024. Official EPA record →

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2019 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2019 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2012 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2012 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2006 Resolved

Monitoring & reporting · Total coliform began May 2004 Resolved

Recent enforcement actions

EPA/federal action · EFL Jun 2024
State action · SOX Jan 2020
State action · SFL Aug 2019
State action · SFL Aug 2017
State action · SOX Aug 2017
State action · SOX Dec 2013
State action · SOX Dec 2013
State action · SFL Feb 2013

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

Fluoride

1 station · latest Jun 2021

0.22 · max 0.22 mg/l · 1

Lead

1 station · latest Jun 2021

0.037 · max 0.037 ug/l · 1

Manganese

1 station · latest Jun 2021

17.9 · max 17.9 ug/l · 1

Uranium

1 station · latest Jun 2021

0.231 · max 0.231 ug/l · 1

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 CA1910026 — 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.