Source document
Golden State Water Company - Los Osos, CA 2025 Consumer Confidence Report
The original annual drinking-water report. Every number on the Golden State Water Company - Los Osos, CA water quality page is pulled from this document.
The Golden State Water Company - Los Osos, CA figures for 2025 come from California's SDWIS Electronic Data Transfer (EDT) library — not a single utility-published PDF. Every value on the Golden State Water Company - Los Osos, 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://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/EDTlibrary.html