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Water system · PWSID AZ0403026

WILLIAMS CITY OF

WILLIAMS, AZ · ~3,145 people served

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

PWSID

AZ0403026

State

Arizona

City

WILLIAMS

Population served

3,145

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

204

Violations on record

0

Unaddressed

9

Health-based

180

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2025. Official EPA record →

Other · EPA contaminant 7000 began Jul 2025 Resolved
Monitoring & reporting · EPA contaminant 0999 began May 2025 Resolved
Other · EPA contaminant 7000 began Oct 2023 Resolved
Treatment technique · EPA contaminant 0300 health-based began May 2023 Resolved
Treatment technique · EPA contaminant 0300 health-based began Apr 2023 Resolved
Other · EPA contaminant 7500 began Jan 2023 Resolved
Monitoring & reporting · Bromate began Jan 2023 Resolved
Other · EPA contaminant 7000 began Oct 2022 Resolved
Monitoring & reporting · Bromate began Oct 2022 Resolved
Treatment technique · Bromate health-based began Oct 2022 Resolved
Monitoring & reporting · EPA contaminant 0200 began Sep 2022 Resolved
Monitoring & reporting · EPA contaminant 0300 began Sep 2022 Resolved

Recent enforcement actions

  • State action · SIA Oct 2025
  • State action · SOX Aug 2025
  • State action · SOX Aug 2025
  • State action · SIA Jul 2025
  • State action · SOX Sep 2024
  • State action · SIA Oct 2023
  • State action · SOX Aug 2023
  • State action · SOX Aug 2023

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

Copper

7 stations · latest Mar 2025

0.0031 · max 4.7 mg/L · 46

Manganese

7 stations · latest Mar 2025

0.135 · max 130 mg/L · 36

Arsenic

7 stations · latest Mar 2025

0.00089 · max 1.3 mg/L · 33

Lead

6 stations · latest Mar 2025

0.001 · max 1.6 mg/L · 26

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 AZ0403026 — 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.