On August 17, 2023, the Environmental Protection Agency (EPA) released initial reports from the 5th Unregulated Contaminated Monitoring Rule for 29 PFAS and lithium.  EPA tested approximately 2,000 water systems.  It found one or more PFAS in 431 water systems and PFOA and PFOS in 220 water systems. 

This first round of testing affects just 7% of drinking water systems that the EPA will test between 2023-5, with final results available in 2026.

See https://www.theguardian.com/environment/2023/aug/17/pfas-us-drinking-water-contaminated-forever-chemicals-epa for more details.