N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Status: No national drinking water standard exists
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) is a member of a group of perfluorinated chemicals used in many consumer products. NMeFOSAA 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
9
utilities detected
235,000
people served
0
states over health guideline
0
utilities over health guideline
0
people served over health guideline
State and national drinking water standards and health guidelines
EWG Health Guideline 1 ppt
The EWG Health Guideline of 1 ppt for NMeFOSAA 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 NMeFOSAA in drinking water
| UTILITIES WITH CONTAMINATION | |||
|---|---|---|---|
| State | Utilities | People Served | |
| California | 4 | 209,350 | |
| Massachusetts | 2 | 20,127 | |
| North Carolina | 2 | 5,199 | |
| New Hampshire | 1 | 136 | |
Filtering technologies that reduce NMeFOSAA
Activated Carbon
Reverse Osmosis
Utilities with the highest amounts of NMeFOSAA, 2017-2019
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Bath Village Water Works | Bath, NH | 1 of 1 | 4.80 ppt | 136 |
| Seekonk Water District | Seekonk, MA | 1 of 1 | 2.06 ppt | 13,627 |
| Pittsboro, Town of* | Pittsboro, NC | 1 of 1 | 1.80 ppt | 4,401 |
| Chapel Ridge S/d | Cary, NC | 1 of 1 | 1.80 ppt | 798 |
| City of Loma Linda | Loma Linda, CA | 1 of 18 | 0.156 ppt | 23,261 |
| Devens Massdevelopment* | Devens, MA | 1 of 37 | 0.0940 ppt | 6,500 |
| 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-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA), but it likely has the contaminant in its water supply.
| Utility | Location | Tests | Average level | People served |
|---|---|---|---|---|
| Seekonk Water District | Seekonk, MA | 1 of 1 | 2.06 ppt | 13,627 |
| City of Loma Linda | Loma Linda, CA | 1 of 18 | 0.156 ppt | 23,261 |
| 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-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA), but it likely has the contaminant in its water supply.