Source document
Norwalk City Pws, OH 2019 Consumer Confidence Report
The original annual drinking-water report. Every number on the Norwalk City Pws, OH water quality page is pulled from this document.
The Norwalk City Pws, OH figures for 2019 come from EPA's national Safe Drinking Water database (SDWIS / ECHO) — not a single utility-published PDF. Every value on the Norwalk City Pws, OH 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