Ontario · San Bernardino County · tap water report
Ontario tap water: lead 0.0006 mg/L, 0 health-based EPA violations on record. Plain-English report and a free home water test.
3 measured results on file across every sampling period the EPA publishes.
Ontario Municipal Utilities Company (PWSID CA3610034) has no violations in the EPA Safe Drinking Water Information System.
Ontario Municipal Utilities Company 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.
Ontario Municipal Utilities Company's most recent Lead and Copper Rule result, from the 2022 to 2024 monitoring period, measured 0.0006 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.
Ontario Municipal Utilities Company serves about 185,010 people in San Bernardino County and relies mainly on surface water. It is public water system CA3610034.
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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