Cardiff By The Sea · San Diego County · tap water report
Cardiff By The Sea tap water: lead 0.0011 mg/L, 0 health-based EPA violations on record for San Dieguito WD. Plain-English report and a free home water test.
5 measured results on file across every sampling period the EPA publishes.
San Dieguito WD (PWSID CA3710021) has 1 violation in the EPA Safe Drinking Water Information System, 0 of them health-based.
San Dieguito WD 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.
San Dieguito WD's most recent Lead and Copper Rule result, from the monitoring period ending Dec 2025, measured 0.0011 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.
The EPA record lists 1 violation for this system, 0 of them health-based. The rest are monitoring and reporting notes.
San Dieguito WD serves about 40,405 people in San Diego County and relies mainly on surface water. It is public water system CA3710021.
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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