4:2 Fluorotelomer sulfonate (4:2 FTS)
EWG Health Guideline
1 ppb
National Average
0.006 ppb
Detected In
6 utilities
Health Risks
The EWG Health Guideline of 1 ppt for 4:2 fluorotelomer sulfonate (4:2 FTS) was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water.
Filtration Methods
Activated Carbon
yes
Reverse Osmosis
yes
Ion Exchange
no
Activated Carbon
yes
Reverse Osmosis
yes
Ion Exchange
no
Activated Carbon
yes
Reverse Osmosis
yes
Ion Exchange
no
Activated Carbon
yes
Reverse Osmosis
yes
Ion Exchange
no
Activated Carbon
yes
Reverse Osmosis
yes
Ion Exchange
no
Activated Carbon
yes
Reverse Osmosis
yes
Ion Exchange
no
Utilities That Detected This Contaminant
| Utility Name | State | Level Detected | Status | |
|---|---|---|---|---|
| Sioux City Water Supply | IA | 0.875 ppt | Detected | View |
| City of South Sioux City | NE | 0.875 ppt | Detected | View |
| Scotia Village Water Works | NY | 0.51 ppt | Detected | View |
| North Kingstown | RI | 0.337 ppt | Detected | View |
| Glenville Water District #11 | NY | 0.268 ppt | Detected | View |
| Twin Creeks Special Service District | UT | 0.01 ppt | Detected | View |