4:2 Fluorotelomer Sulfonic Acid (4:2 FTSA)
EWG Health Guideline
1 ppb
Detected In
2 utilities
Health Risks
The EWG Health Guideline of 1 ppt for 4:2 fluorotelomer sulfonic acid (4:2 FTSA) 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
Utilities That Detected This Contaminant
| Utility Name | State | Level Detected | Status | |
|---|---|---|---|---|
| Canton Water Department (MWRA) | MA | 0.429 ppt | Detected | View |
| Emerald Coast Utilities Authority | FL | 0.141 ppt | Detected | View |