Contaminant · PFAS
8:2 FTS in drinking water
1H,1H,2H,2H-perfluorodecane sulfonic acid, a fluorotelomer sulfonate.
What the rules say
8:2 FTS has no federal limit or EPA health reference value.
Read the EPA source for 8:2 FTS.
Across the country
EPA tested 10,307 water systems for 8:2 FTS and found it in 10. Half of the systems that found it measured less than 8.9 ppt, and one in ten measured more than 29.5 ppt.
EPA's final UCMR 5 occurrence file contains 66,352 8:2 FTS results from 10,307 systems. 12 results were at or above the minimum reporting level, across 10 systems. Among detections, the median was 8.9 ppt and the 90th percentile was 29.5 ppt.
Systems with the highest recorded 8:2 FTS results
| System | State | Population served | Recorded value | Records / periods |
|---|---|---|---|---|
| Emmaus Borough Public Water PA3390032 | Pennsylvania | 14,000 | 41.9 ppt | 2 |
| Georgetown Water Department DE0000592 | Delaware | 7,259 | 30.0 ppt | 1 |
| Mdwasa - Main System FL4130871 | Florida | 2,377,460 | 9.6 ppt | 2 |
| North Bay Village, City of FL4130970 | Florida | 8,317 | 10.7 ppt | 1 |
| Metropolitano PR0002591 | Puerto Rico | 1,084,637 | 15.3 ppt | 1 |
| Gwa Northern Water System GU0000006 | Guam | 139,207 | 7.5 ppt | 1 |
| Bal Harbour Village FL4130077 | Florida | 3,209 | 7.4 ppt | 1 |
| Hialeah, City of FL4130604 | Florida | 238,000 | 5.5 ppt | 1 |
| Miami Beach, City of FL4130901 | Florida | 100,000 | 5.3 ppt | 1 |
| Sherwood, City of OR4100816 | Oregon | 19,885 | 8.0 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 8:2 FTS or the specific contaminant you want to reduce. A utility-level record is not a test of your own faucet.