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Water system · PWSID CA2310004

WILLITS, CITY OF

WILLITS, CA · ~6,175 people served

Check your exact address → WILLITS overview
100
Excellent
PurityRadar safety score

PWSID

CA2310004

State

California

City

WILLITS

Population served

6,175

Primary source

Surface water

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

14

Violations on record

0

Unaddressed

13

Health-based

12

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2016. Official EPA record →

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2015 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2015 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2015 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2015 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2015 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2013 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2013 Resolved
Treatment technique · EPA contaminant 0300 health-based began Apr 2012 Resolved
Monitoring & reporting · Total coliform began Aug 2011 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jan 2008 Resolved

Recent enforcement actions

  • State action · SOX Jul 2016
  • State action · SOX Jul 2016
  • State action · SFL Aug 2015
  • State action · SFL Oct 2013
  • State action · SOX Jun 2012
  • State action · SFL May 2012
  • State action · SOX Sep 2011
  • State action · SFL Sep 2011

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

1 station · latest Jul 2022

0.064 · max 0.064 mg/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 CA2310004 — 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.