Lead Pipe Map

California · population 11,324

Lead pipes in Half Moon Bay, CA

No lead lines reported

Most of Half Moon Bay (population 11,324) gets its water from Coastside County Water District, which reported 7,710 service lines and no lead, galvanized or unknown lines.

0% of Coastside County Water District'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
7,710Non-lead

Latest lead test for Coastside County Water District (Jan 2022–Dec 2024): 1.6 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.

Compliance record: EPA lists no Lead and Copper Rule violations since 2015 for Coastside County Water District.

Water systems serving Half Moon Bay

Water systemLeadGalv.Unknown% lead
Coastside County Water DistrictMain system0000%
California Water Service - Bear GulchServes 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 Half Moon Bay

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

Find the official inventory mapCoastside County Water District 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 Half Moon Bay, CA have lead pipes?

Coastside County Water District, which serves Half Moon Bay, reported no lead, galvanized or unknown service lines.

Who supplies water to Half Moon Bay?

EPA's service area maps place most of Half Moon Bay in Coastside County Water District's service area (PWSID CA4110011). California Water Service - Bear Gulch also serves parts of the city or nearby areas.

How do I check whether my Half Moon Bay home has a lead service line?

Search your address on Coastside County Water District'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 Half Moon Bay 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 Coastside County Water District whether your street is scheduled and whether it covers the private side.