Source document
Gaf Materials Co, CA 2015 Consumer Confidence Report
The original annual drinking-water report. Every number on the Gaf Materials Co, CA water quality page is pulled from this document.
The Gaf Materials Co, CA figures for 2015 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Gaf Materials Co, 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