LOWER LAKE COUNTY WATER DISTRICT

LOWER LAKE, CA · ~1,326 people served

Check your exact address → LOWER LAKE overview

100

Excellent

PurityRadar safety score

PWSID

CA1710010

State

California

City

LOWER LAKE

Population served

1,326

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

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Oct 2024 Resolved

Max contaminant level (MCL) · Total coliform health-based began Oct 1997 Resolved

Monitoring & reporting · EPA contaminant 2977 began May 1995 Resolved

Recent enforcement actions

State action · SOX Jun 2025
State action · SFL Jan 2025
State action · SFL Oct 2024
State action · SOX Mar 2018
State action · SOX Dec 1997
State action · SFJ Dec 1997
State action · SIA Jun 1995

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

Manganese

1 station · latest Apr 2023

5.71 · max 5.71 ug/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 CA1710010 — 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.