Source document
Lone Rock Water Assn, WA 2025 Consumer Confidence Report
The original annual drinking-water report. Every number on the Lone Rock Water Assn, WA water quality page is pulled from this document.
The Lone Rock Water Assn, WA figures for 2025 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Lone Rock Water Assn, 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