HIGHLANDS MUTUAL WATER COMPANY

CLEARLAKE, CA · ~7,772 people served

Check your exact address → CLEARLAKE overview

100

Excellent

PurityRadar safety score

PWSID

CA1710003

State

California

City

CLEARLAKE

Population served

7,772

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

Latest detections from EPA’s UCMR5 monitoring (through Nov 2024). Levels in parts per trillion (ppt).

Lithium

25,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2021. Official EPA record →

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2021 Resolved

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2021 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2019 Resolved

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2019 Resolved

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2019 Resolved

Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2015 Resolved

Recent enforcement actions

State action · SOX Oct 2021
State action · SOX Jun 2021
State action · SFL Apr 2021
State action · SFL Feb 2020
State action · SIA Jan 2020
State action · SOX Jan 2020
State action · SOX Jan 2020
State action · SFL Jun 2019

This profile is built from EPA public records for system CA1710003 — 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.