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Water system · PWSID CA3010038

CITY OF SANTA ANA

SANTA ANA, CA · ~310,539 people served

Check your exact address → SANTA ANA overview

Action needed

PurityRadar safety score

PWSID

CA3010038

State

California

City

SANTA ANA

Population served

310,539

Primary source

SWP

Score history

▼ 66 points — the score moved from 100 to 34 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 34

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

PFOA

Perfluorooctanoic acid

5.7 ppt

limit 4 ppt

Above EPA limit · 1.4×

PFOS

Perfluorooctanesulfonic acid

4.6 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFHxS

Perfluorohexanesulfonic acid

3 ppt

limit 10 ppt

Below EPA limit

Lithium

27,899 ppt

limit —

No federal limit

PFHxA

4 ppt

limit —

No federal limit

PFPeA

3.6 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2022. Official EPA record →

Other · Lead & Copper Rule began Oct 2021 Resolved

Monitoring & reporting · EPA contaminant 0700 began Sep 2016 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2013 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2013 Resolved

Monitoring & reporting · Total coliform began Apr 2010 Resolved

Max contaminant level (MCL) · Total coliform health-based began Apr 1993 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jan 1993 Resolved

Recent enforcement actions

State action · SOX Jul 2022
State action · SFL Feb 2022
State action · SIA Oct 2016
State action · SOX Oct 2016
State action · SIA Aug 2013
State action · SOX Jun 2013
State action · SFJ Jun 2010
State action · SOX May 2010

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

Nitrate

5 stations · latest Jul 2020

2.07 · max 2.37 mg/l as N · 10

Arsenic

5 stations · latest Jul 2020

0.92 · max 2.4 ug/l · 5

Copper

5 stations · latest Jul 2020

1.5 · max 1.7 ug/l · 5

Fluoride

5 stations · latest Jul 2020

0.36 · max 0.72 mg/l · 5

Lead

5 stations · latest Jul 2020

1.02 · max 3.08 ug/l · 5

Uranium

5 stations · latest Jul 2020

1.97 · max 7.29 ug/l · 5

Manganese

2 stations · latest Jul 2020

1.76 · max 3.05 ug/l · 2

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 CA3010038 — 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.