BLUE LAKE SPRINGS MUT WTR

ARNOLD, CA · ~4,841 people served

Check your exact address → ARNOLD overview

100

Excellent

PurityRadar safety score

PWSID

CA0510009

State

California

City

ARNOLD

Population served

4,841

Primary source

SWP

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

Latest detections from EPA’s UCMR5 monitoring (through Oct 2023). Levels in parts per trillion (ppt).

Lithium

20,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2020. Official EPA record →

Other · EPA contaminant 7000 began Jul 2019 Resolved

Monitoring & reporting · Total coliform began Apr 1993 Resolved

Recent enforcement actions

State action · SOX Aug 2020
State action · SFL May 2020
EPA/federal action · EOX Mar 2000
EPA/federal action · EFJ May 1993
State action · SOX May 1993
State action · SIA Apr 1993

This profile is built from EPA public records for system CA0510009 — 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.