Lead Pipe Map

California · population 12,979

Lead pipes in Grand Terrace, CA

No lead lines reported

Most of Grand Terrace (population 12,979) gets its water from Riverside Highland Water Company, which reported 6,403 service lines and no lead, galvanized or unknown lines.

0% of Riverside Highland 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
6,403Non-lead

Latest lead test for Riverside Highland Water Company (2025): 1.5 ppb 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, 1 still open for Riverside Highland Water Company.

Water systems serving Grand Terrace

Water systemLeadGalv.Unknown% lead
Riverside Highland Water CompanyMain system0000%
City of ColtonServes 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 Grand Terrace

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

Find the official inventory mapRiverside Highland 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 Grand Terrace, CA have lead pipes?

Riverside Highland Water Company, which serves Grand Terrace, reported no lead, galvanized or unknown service lines.

Who supplies water to Grand Terrace?

EPA's service area maps place most of Grand Terrace in Riverside Highland Water Company's service area (PWSID CA3610057). City of Colton also serves parts of the city or nearby areas.

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

Search your address on Riverside Highland 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 Grand Terrace 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 Riverside Highland Water Company whether your street is scheduled and whether it covers the private side.