Source document
Cougar Mountain, WA 2023 Consumer Confidence Report
The original annual drinking-water report. Every number on the Cougar Mountain, WA water quality page is pulled from this document.
The Cougar Mountain, WA figures for 2023 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Cougar Mountain, WA 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