Source document
City of Hayward, CA 2010 Consumer Confidence Report
The original annual drinking-water report. Every number on the City of Hayward, CA water quality page is pulled from this document.
The City of Hayward, CA figures for 2010 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the City of Hayward, 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