What are PFAS, PFOA and PFOS?

PFAS is an abbreviation for per-and polyfluoro substances. The PFAS compounds that have been studied the most are PFOA (perfluorooctanoic acid) and PFOS (perfluorooctanesulfonic acid).

Has TMWA detected PFAS or PFOA/PFOS compounds in our drinking water?


What sampling has TMWA conducted regarding PFAS?

For the EPA’s UCMR-3 process, TMWA sampled over a dozen groundwater wells and sent those samples to a 3rd party laboratory for PFAS analyses. Results for all samples showed that PFAS was ‘non-detectable’. As recently as December 2019, TMWA sent out PFAS samples from two groundwater wells and from the Chalk Bluff Water Treatment Plant influent and finished drinking water. These test results also showed PFAS to be ‘non-detectable’.

How are drinking water regulations determined?

The Safe Drinking Water Act (SDWA) was established in 1974, and updated in 1996, to apply a science-based, data-driven, peer-review process for the development of health-related drinking water regulations. The Environmental Protection Agency currently regulates more than 90 drinking water contaminants under the SDWA but there is no current regulation in place for PFAS. Occurrence data and health impacts are being collected, based on SDWA guidelines, to determine at what level a PFAS regulation should be established.