Source document

Columbia Water System, LA 2009 Consumer Confidence Report

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

The Columbia Water System, LA figures for 2009 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Columbia Water System, LA 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