Ontario, CA Water Quality (ZIP 91761)

PFAS, lead, and EPA-tested contaminants for ZIP 91761 in Ontario, CA.

ZIP code 91761 in Ontario, CA is served by the same public water system that supplies the rest of Ontario. Because the EPA test results are identical across these ZIP codes, the full contamination breakdown lives on one page.

See the full Ontario, CA water quality report →

Check your exact address

  1. Open the full Ontario report for PFAS levels, lead samples, and EPA violations.
  2. Enter your address at knowyourexposure.com for the most specific data we have.
  3. Choose a certified filter: an NSF/ANSI 58 reverse osmosis system removes 94-99% of PFAS, and an NSF-53 pitcher covers lead.