Source document
Usace Illia Residential Area, WA 2025 Consumer Confidence Report
The original annual drinking-water report. Every number on the Usace Illia Residential Area, WA water quality page is pulled from this document.
The Usace Illia Residential Area, 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 Usace Illia Residential Area, 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