Source document
Napa, City of, CA 2012 Consumer Confidence Report
The original annual drinking-water report. Every number on the Napa, City of, CA water quality page is pulled from this document.
The Napa, City of, CA figures for 2012 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Napa, City of, 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