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Water system · PWSID CA2310003

UKIAH, CITY OF

UKIAH, CA · ~16,607 people served

Check your exact address → UKIAH overview
63
Fair
PurityRadar safety score

PWSID

CA2310003

State

California

City

UKIAH

Population served

16,607

Primary source

Surface water

Score history

▼ 37 points — the score moved from 100 to 63 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 63

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 2023). Levels in parts per trillion (ppt).

PFOA

Perfluorooctanoic acid

6.9 ppt

limit 4 ppt

Above EPA limit · 1.7×

PFOS

Perfluorooctanesulfonic acid

4.3 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFHxS

Perfluorohexanesulfonic acid

3.6 ppt

limit 10 ppt

Below EPA limit

6:2 FTS

18 ppt

limit —

No federal limit

PFBA

9.2 ppt

limit —

No federal limit

PFPeA

5.1 ppt

limit —

No federal limit

PFHxA

4.4 ppt

limit —

No federal limit

PFBS

3.6 ppt

limit —

No federal limit

PFHpA

3.3 ppt

limit —

No federal limit

Violations & enforcement

2

Violations on record

1

Unaddressed

1

Health-based

2

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 1996. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2022 Unaddressed
Max contaminant level (MCL) · Total coliform health-based began Feb 1996 Resolved

Recent enforcement actions

  • State action · SOX Mar 1996
  • State action · SFJ Mar 1996

This profile is built from EPA public records for system CA2310003 — 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.