Source document
Treasure Island, CA 2018 Consumer Confidence Report
The original annual drinking-water report. Every number on the Treasure Island, CA water quality page is pulled from this document.
The Treasure Island, CA figures for 2018 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Treasure Island, 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