Datasets | CA Open Data - California

data californiaThe PFAS in Drinking Water Maps (PFAS Maps) are an interactive series of maps for exploring both the US EPA Unregulated Contaminant Monitoring Rule (UCMR) 3 (2013-2015) DataCalifornia is the most populous U.S. state, with an estimated population of 38.9 million as of 2025. The state has people from a wide variety of ethnic