Source document
Ontario Municipal Utilities Company, CA 2025 Consumer Confidence Report
The original annual drinking-water report. Every number on the Ontario Municipal Utilities Company, CA water quality page is pulled from this document.
The Ontario Municipal Utilities Company, CA figures for 2025 come from California's SDWIS Electronic Data Transfer (EDT) library — not a single utility-published PDF. Every value on the Ontario Municipal Utilities Company, CA water quality page is transcribed from that public dataset, and you can verify it against the same source below.
View the source dataset ↗https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/EDTlibrary.html