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Water system · PWSID 090400003

Chui Chu

Sells, AZ · ~420 people served

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

PWSID

090400003

State

Arizona

City

Sells

Population served

420

Primary source

Groundwater

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

7

Violations on record

1

Unaddressed

3

Health-based

13

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2015. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jul 2025 Unaddressed
Monitoring & reporting · Nitrate began Apr 2015 Resolved
Monitoring & reporting · Nitrate began Jan 2004 Resolved
Monitoring & reporting · Nitrate began Jan 2003 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2000 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2000 Resolved

Recent enforcement actions

  • EPA/federal action · EOX Aug 2015
  • EPA/federal action · EIC Apr 2011
  • EPA/federal action · EIC Jan 2011
  • EPA/federal action · EOY Mar 2008
  • EPA/federal action · EOX Aug 2005
  • EPA/federal action · EOX Aug 2005
  • EPA/federal action · EOX Aug 2005
  • EPA/federal action · EOX Aug 2005

This profile is built from EPA public records for system 090400003 — 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.