N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA)
Status: No national drinking water standard exists
N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) is a member of a group of perfluorinated chemicals used in many consumer products. N-EtFOSAA and other perfluorinated chemicals can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes. These chemicals are persistent in the environment and they accumulate in people. Click here to read more about perfluorinated chemicals.
2017-2019:
4
states detected
13
utilities detected
441,000
people served
0
states over health guideline
0
utilities over health guideline
0
people served over health guideline
Health concerns for N-EtFOSAA
Cancer
Harm to the immune system
Hormone disruption
Harm to fetal growth and child development
Harm to the liver
State and national drinking water standards and health guidelines
EWG Health Guideline 1 ppt
The EWG Health Guideline of 1 ppt for N-EtFOSAA was defined by EWG as 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. This health guideline protects against applies to the entire class of PFAS detected in water.
ppt = parts per trillion
States reporting N-EtFOSAA in drinking water
| UTILITIES WITH CONTAMINATION | |||
|---|---|---|---|
| State | Utilities | People Served | |
| California | 7 | 362,645 | |
| New Hampshire | 3 | 69,136 | |
| Massachusetts | 2 | 6,592 | |
| Maine | 1 | 2,425 | |
Filtering technologies that reduce N-EtFOSAA
Activated Carbon
Reverse Osmosis
Utilities with the highest amounts of N-EtFOSAA, 2017-2019
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Bath Village Water Works | Bath, NH | 1 of 1 | 4.99 ppt | 136 |
| The Meeting House @ Stow Condo | Stow, MA | 1 of 1 | 2.18 ppt | 92 |
| Mexico Water District | Mexico, ME | 1 of 1 | 2.10 ppt | 2,425 |
| Rochester Water Department | Rochester, NH | 1 of 3 | 0.713 ppt | 25,000 |
| Concord Water Department | Concord, NH | 1 of 5 | 0.416 ppt | 44,000 |
| Montebello Land & Water Company | Montebello, CA | 1 of 28 | 0.357 ppt | 32,219 |
| City of Loma Linda | Loma Linda, CA | 1 of 18 | 0.222 ppt | 23,261 |
| Devens Massdevelopment* | Devens, MA | 1 of 37 | 0.121 ppt | 6,500 |
| Valencia Water Company* | Valencia, CA | 1 of 45 | 0.0600 ppt | 117,251 |
| Home Gardens County Water District | Corona, CA | 1 of 78 | 0.0310 ppt | 3,033 |
| City of Corona* | Corona, CA | 1 of 78 | 0.0310 ppt | 155,896 |
* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) , but it likely has the contaminant in its water supply.
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Rochester Water Department | Rochester, NH | 1 of 3 | 0.713 ppt | 25,000 |
| Concord Water Department | Concord, NH | 1 of 5 | 0.416 ppt | 44,000 |
| Montebello Land & Water Company | Montebello, CA | 1 of 28 | 0.357 ppt | 32,219 |
| City of Loma Linda | Loma Linda, CA | 1 of 18 | 0.222 ppt | 23,261 |
| Valencia Water Company* | Valencia, CA | 1 of 45 | 0.0600 ppt | 117,251 |
| City of Corona* | Corona, CA | 1 of 78 | 0.0310 ppt | 155,896 |
* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) , but it likely has the contaminant in its water supply.