Source document
Foss Reservoir Mcd, OK 2021 Consumer Confidence Report
The original annual drinking-water report. Every number on the Foss Reservoir Mcd, OK water quality page is pulled from this document.
The Foss Reservoir Mcd, OK figures for 2021 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Foss Reservoir Mcd, OK 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