Source document
Covina-city, Water Dept., CA 2004 Consumer Confidence Report
The original annual drinking-water report. Every number on the Covina-city, Water Dept., CA water quality page is pulled from this document.
The Covina-city, Water Dept., CA figures for 2004 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Covina-city, Water Dept., CA 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