Contaminant · PFAS
PFDoA in drinking water
Perfluorododecanoic acid, a long-chain PFAS.
What the rules say
PFDoA has no federal limit or EPA health reference value.
Read the EPA source for PFDoA.
Across the country
EPA tested 10,307 water systems for PFDoA and found it in 4. Half of the systems that found it measured less than 3.9 ppt, and one in ten measured more than 4.6 ppt.
EPA's final UCMR 5 occurrence file contains 66,351 PFDoA results from 10,307 systems. 4 results were at or above the minimum reporting level, across 4 systems. Among detections, the median was 3.9 ppt and the 90th percentile was 4.6 ppt.
Systems with the highest recorded PFDoA results
| System | State | Population served | Recorded value | Records / periods |
|---|---|---|---|---|
| Ponce Urbano PR0003824 | Puerto Rico | 113,972 | 3.2 ppt | 1 |
| Yabucoa Urbano PR0005196 | Puerto Rico | 14,728 | 4.7 ppt | 1 |
| Jayuya Urbano PR0002712 | Puerto Rico | 7,746 | 4.5 ppt | 1 |
| Healdsburg, City of CA4910005 | California | 10,985 | 3.1 ppt | 1 |
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 PFDoA or the specific contaminant you want to reduce. A utility-level record is not a test of your own faucet.