San Dimas · Los Angeles County · tap water report
San Dimas tap water: lead 0.0021 mg/L, 0 health-based EPA violations on record for GSWC-San Dimas. Plain-English report and a free home water test.
6 measured results on file across every sampling period the EPA publishes.
GSWC-San Dimas (PWSID CA1910142) has no violations in the EPA Safe Drinking Water Information System.
GSWC-San Dimas has no health-based EPA violations in the last three years. Its measured lead results are listed on this page. What your own plumbing adds is a separate question, which is what the free in-home test answers.
GSWC-San Dimas's most recent Lead and Copper Rule result, from the 2024 to 2026 monitoring period, measured 0.0021 mg/L of lead at the 90th percentile of tested homes. The federal action level is 0.015 mg/L, so the system result sits under it. Lead usually enters water from a home's own pipes and fixtures, so a single house can differ from the system figure.
No. The EPA Safe Drinking Water Information System lists no violations for this system.
GSWC-San Dimas serves about 56,564 people in Los Angeles County and relies mainly on surface water. It is public water system CA1910142.
Text 949-414-9944 for a free water test. A local FilteredWTR tech screens the water at your own faucet for hardness, chlorine and sediment and explains each reading while you watch. The visit is free, and afterward the decision stays yours.
A local FilteredWTR tech screens the water at your faucet for hardness, chlorine and sediment and explains each reading while you watch. The visit is free, and afterward the decision stays yours.
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