KONOCTI COUNTY WATER DISTRICT

CLEARLAKE, CA · ~5,928 people served

Check your exact address → CLEARLAKE overview

100

Excellent

PurityRadar safety score

PWSID

CA1710006

State

California

City

CLEARLAKE

Population served

5,928

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 Oct 2023). Levels in parts per trillion (ppt).

Lithium

21,000 ppt

limit —

No federal limit

PFBA

8.2 ppt

limit —

No federal limit

PFPeA

3.9 ppt

limit —

No federal limit

Violations & enforcement

No violations are on record for this system in EPA’s SDWIS/ECHO data.

This profile is built from EPA public records for system CA1710006 — 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.