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Water system · PWSID 090605025

Upper Lake Hardisty System

Upper Lake, CA · ~98 people served

Check your exact address → Upper Lake overview
100
Excellent
PurityRadar safety score

PWSID

090605025

State

California

City

Upper Lake

Population served

98

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

75

Violations on record

0

Unaddressed

3

Health-based

206

Enforcement actions

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

Monitoring & reporting · EPA contaminant 0999 began Jan 2022 Resolved
Monitoring & reporting · Total coliform began Mar 2012 Resolved
Monitoring & reporting · Total coliform began Mar 2011 Resolved
Monitoring & reporting · Total coliform began Dec 2009 Resolved
Monitoring & reporting · Total coliform began Sep 2007 Resolved
Monitoring & reporting · Total coliform began Aug 2004 Resolved
Monitoring & reporting · Total coliform began Mar 2004 Resolved
Monitoring & reporting · Total coliform began Nov 2003 Resolved
Monitoring & reporting · Total coliform began Oct 2003 Resolved
Monitoring & reporting · Total coliform began Sep 2003 Resolved
Monitoring & reporting · Total coliform began Jul 2003 Resolved
Monitoring & reporting · Total coliform began May 2003 Resolved

Recent enforcement actions

  • EPA/federal action · EOX Mar 2022
  • EPA/federal action · EOX Jul 2012
  • EPA/federal action · EIC Nov 2011
  • EPA/federal action · EIC Aug 2011
  • EPA/federal action · EIF Aug 2011
  • EPA/federal action · EOX Aug 2011
  • EPA/federal action · EIC Aug 2011
  • EPA/federal action · EIA May 2011

This profile is built from EPA public records for system 090605025 — 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.