Lead Pipe Map

California · population 16,636

Lead pipes in Clearlake, CA

No lead lines reported

Most of Clearlake (population 16,636) gets its water from Highlands Mutual Water Company, which reported 2,355 service lines and no lead, galvanized or unknown lines.

0% of Highlands Mutual Water Company's service lines are lead or galvanized requiring replacement, lower than the California average (0.1%) and lower than the national average (3.1%).

0Lead
0Galvanized, replace
0Unknown material
2,355Non-lead

Latest lead test for Highlands Mutual Water Company (Jan 2024–Dec 2026): not detected at the 90th percentile, against a 15 ppb federal action level. Full test history.

Compliance record: EPA lists 1 Lead and Copper Rule violation since 2015 for Highlands Mutual Water Company.

Water systems serving Clearlake

Water systemLeadGalv.Unknown% lead
Highlands Mutual Water CompanyMain system0000%
Golden State Water Co.-Clearlake SystemServes nearby areas0000%

Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.

Check your address in Clearlake

The counts above cover the whole water system. To see whether your line is lead, look up your address on Highlands Mutual Water Company's official inventory. Utilities had to make these public by October 16, 2024.

Find the official inventory mapHighlands Mutual Water Company details

No map yet? Do the 2-minute scratch and magnet test.

Protect your drinking water

If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.

Pitcher filtersCheapest start. Pick one certified to NSF/ANSI 53 for lead, such as Brita Elite, PUR Plus or ZeroWater.See pitchers Faucet-mount filtersFilters straight from the tap. Look for NSF/ANSI 53 lead reduction on the box.See faucet filters Under-sink systemsBest for families. Carbon block (NSF 53) or reverse osmosis (NSF 58) units rated for lead.See under-sink

Choosing a lead-certified filter · Testing your water · Replacement cost

Nearby cities

Check another water system

Questions

Does Clearlake, CA have lead pipes?

Highlands Mutual Water Company, which serves Clearlake, reported no lead, galvanized or unknown service lines.

Who supplies water to Clearlake?

EPA's service area maps place most of Clearlake in Highlands Mutual Water Company's service area (PWSID CA1710003). Golden State Water Co.-Clearlake System also serves parts of the city or nearby areas.

How do I check whether my Clearlake home has a lead service line?

Search your address on Highlands Mutual Water Company's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.

When will lead pipes in Clearlake be replaced?

EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Highlands Mutual Water Company whether your street is scheduled and whether it covers the private side.