Source document
Durham Ferry Community School, CA 2021 Consumer Confidence Report
The original annual drinking-water report. Every number on the Durham Ferry Community School, CA water quality page is pulled from this document.
The Durham Ferry Community School, CA figures for 2021 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Durham Ferry Community School, 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://echo.epa.gov/tools/data-downloads/sdwa-download-summary