Source document

Columbia Helicopters, OR 2025 Consumer Confidence Report

The original annual drinking-water report. Every number on the Columbia Helicopters, OR water quality page is pulled from this document.

The Columbia Helicopters, OR figures for 2025 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Columbia Helicopters, OR 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