Contaminant · PFAS
PFTrDA in drinking water
Perfluorotridecanoic acid, a long-chain PFAS.
What the rules say
PFTrDA has no federal limit or EPA health reference value.
Read the EPA source for PFTrDA.
Across the country
EPA tested 10,309 water systems for PFTrDA and found it in 0. Half of the systems that found it measured less than —, and one in ten measured more than —.
EPA's final UCMR 5 occurrence file contains 66,603 PFTrDA results from 10,309 systems. 0 results were at or above the minimum reporting level, across 0 systems. Among detections, the median was — and the 90th percentile was —.
Systems with the highest recorded PFTrDA results
No system in this dataset has a reported detection or exceedance for this contaminant.
Filters and testing
NSF/ANSI 53 or 58 with a PFAS reduction claim
A standard number by itself is not a contaminant claim. Check the product's current certification listing and performance data sheet for PFTrDA or the specific contaminant you want to reduce. A utility-level record is not a test of your own faucet.