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CONTAMINANT

N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA)

FOUND

Exceeding guidelines

STATES DETECTED

12

serves

2.6 million

utilities detected

205

states detected

5

serves

49,833

utilities detected

5

Overview

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.

State, National, and Health Guidelines for Drinking Water

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.

ppt = parts per trillion

National Standard Exists

Health Concerns:

  • Cancer

  • Harm to the immune system

  • Hormone disruption

  • Harm to fetal growth and child development

  • Harm to the liver

Want to remove
N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) from your water?

Try these filter technologies:

Activated Carbon, 

Reverse Osmosis, 

understand filter technology

N-ethyl perfluorooctane sulfonamido acetic acid (N-EtFOSAA) around the Country

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State Utilities People Served Utilities People Served
Massachusetts14001161,647,478
California0011421,315
Alabama19,7419133,842
Michigan0030106,629
New Jersey00287,585
New Hampshire1136369,136
Colorado00458,283
New York14502552,390
Wisconsin139,106242,296
Florida00115,561
Maine0012,425
Illinois0011,595

Utilities with the highest amounts of N-EtFOSAA, 2018-2024

ALL UTILITIES
LARGE UTILITIES
Utility Location Tests Average level People served
Brook Village CondominiumBoxborough, MA14 of 167.31 ppt400
Montevallo Water Works & SewerMontevallo, AL2 of 226.37 ppt9,741
Bath Village Water WorksBath, NH1 of 14.99 ppt136
Wausau WaterworksWausau, WI7 of 74.31 ppt39,106
Sandridge Mobile Home ParkElbridge, NY1 of 42.10 ppt450
Satsuma Water WorksSatsuma, AL1 of 121.83 ppt7,248
Red Creek North SaWalworth, NY1 of 21.80 ppt36
Red Creek Village*Walworth, NY1 of 21.80 ppt535
Rothschild WaterworksRothschild, WI2 of 31.63 ppt3,190
United Water CamdenCamden, NJ15 of 321.39 ppt46,585
Meadowbrook FarmFishkill, NY1 of 21.29 ppt55
Ariton Water WorksAriton, AL1 of 61.18 ppt1,263
Mexico Water DistrictMexico, ME1 of 21.05 ppt2,425
Dade City Water DepartmentDade City, FL1 of 70.986 ppt15,561
Hillcrest Village Mobile Home ParkWheat Ridge, CO1 of 30.967 ppt1,505
Altona Correctional FacilityAltona, NY1 of 10.927 ppt800
SchoolcraftSchoolcraft, MI1 of 40.925 ppt1,525
Valley View EstatesFarmington Hills, NY1 of 10.845 ppt404
Starr Ridge ManorBrewster, NY1 of 20.835 ppt420
Morleys Mobile ParkOgdensburg, NY1 of 60.800 ppt150
Kent Ridge ApartmentsCedar Springs, MI1 of 40.775 ppt120
Portage TerraceGranger, MI1 of 50.740 ppt202
Mcti Family HousingPlainwell, MI1 of 40.725 ppt40
Rochester Water DepartmentRochester, NH1 of 30.713 ppt25,000
Yankee Springs MeadowsFarmington Hills, MI1 of 40.700 ppt710
North Brunswick W Department*Somerset, NJ2 of 120.633 ppt41,000
Great Lakes Adventist AcademyCedar Lake, MI1 of 80.613 ppt360
Harvard Ridge CondominiumBoxborough, MA18 of 520.613 ppt350
Sun Meadows ApartmentsSchoolcraft, MI1 of 40.600 ppt98
Pleasant Valley Garden ApartmentsRoslyn Heights, NY1 of 20.570 ppt30
Sand LakeSand Lake, MI1 of 40.550 ppt360
Leisure VillageSouthfield, MI1 of 70.543 ppt365
HartfordHartford, MI1 of 120.533 ppt2,688
Olivet, City ofOlivet, MI1 of 120.500 ppt1,758
The Meeting House @ Stow CondoStow, MA1 of 50.436 ppt92
Baldwin, Village ofBaldwin, MI2 of 280.436 ppt1,060
Delancy Street Foundation (castle)Brewster, NY1 of 60.428 ppt48
Dykeer Water CompanyMerrick, NY4 of 130.407 ppt480
Mashpee Water District*Mashpee, MA7 of 400.401 ppt34,681
BronsonBronson, MI1 of 50.400 ppt2,421
MiddlevilleMiddleville, MI1 of 180.389 ppt3,309
Covington Green CondominiumLong Island City, NY1 of 40.358 ppt120
Meads Pond Mobile Home ParkNorwich, NY2 of 40.355 ppt56
Blooming Grove Water District #5-Mountain ViewBlooming Grove, NY1 of 20.315 ppt300
Caledonia TownshipCaledonia, MI1 of 100.310 ppt4,573
Crockery Mobile Home ParkBloomfield Hills, MI1 of 180.294 ppt413
Saint Benedict AbbeyHarvard, MA2 of 40.288 ppt25
Eastgate Village Manufactured HomesFarmington Hills, CO2 of 200.260 ppt1,500
Brighton Village LlcFort Collins, CO2 of 200.260 ppt77
City of Brighton*Brighton, CO2 of 200.260 ppt55,201

* 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.

UtilityLocationTestsAverage levelPeople served
Wausau WaterworksWausau, WI7 of 74.31 ppt39,106
United Water CamdenCamden, NJ15 of 321.39 ppt46,585
Dade City Water DepartmentDade City, FL1 of 70.986 ppt15,561
Rochester Water DepartmentRochester, NH1 of 30.713 ppt25,000
North Brunswick W Department*Somerset, NJ2 of 120.633 ppt41,000
Mashpee Water District*Mashpee, MA7 of 400.401 ppt34,681
City of Brighton*Brighton, CO2 of 200.260 ppt55,201
Concord Water DepartmentConcord, NH1 of 90.231 ppt44,000
New Bedford Department of Public Infrastructure*New Bedford, MA1 of 90.126 ppt95,072
Dartmouth Water DivisionDartmouth, MA1 of 90.126 ppt24,272
Whitman Water SystemWhitman, MA3 of 280.116 ppt14,574
Brockton Water Commission*Brockton, MA3 of 280.116 ppt93,810
Milford Water Company*Milford, MA2 of 130.116 ppt27,999
Bellflower - Somerset MWC*Bellflower, CA1 of 320.109 ppt46,300
Abington/rockland Joint Water WorksRockland, MA6 of 890.107 ppt33,887
City of Loma LindaLoma Linda, CA1 of 400.1000 ppt24,791
Montebello Land & Water CompanyMontebello, CA1 of 1050.0950 ppt26,554
Grafton Water District*Grafton, MA1 of 850.0900 ppt10,703
Westborough Water DepartmentWestborough, MA2 of 650.0890 ppt18,272
Seekonk Water DistrictSeekonk, MA2 of 210.0850 ppt13,627
Billerica Water WorksBillerica, MA2 of 320.0780 ppt40,243
East Bridgewater Water DepartmentEast Bridgewater, MA2 of 200.0640 ppt13,794
Grand HavenGrand Haven, MI1 of 430.0630 ppt10,412
Pico WDPico Rivera, CA1 of 500.0620 ppt22,051
Norwalk Water DepartmentNorwalk, CA1 of 470.0620 ppt17,790
Dedham Westwood Water DistrictDedham, MA5 of 970.0600 ppt42,581
Haverhill Water DepartmentHaverhill, MA1 of 200.0600 ppt57,311
Greenfield Water Department*Greenfield, MA1 of 250.0540 ppt17,645
Taunton Water Division*Taunton, MA1 of 110.0520 ppt58,088
Danvers Water Department*Middleton, MA1 of 330.0510 ppt26,493
Uxbridge DPW Water DivisionUxbridge, MA2 of 600.0500 ppt10,715
Ipswich DPU Water DepartmentIpswich, MA4 of 760.0470 ppt13,127
Middleborough Water Supply*Middleborough, MA3 of 810.0430 ppt16,470
Sudbury Water DistrictSudbury, MA5 of 1320.0380 ppt18,410
Shrewsbury Water DepartmentShrewsbury, MA3 of 820.0370 ppt35,608
Brewster Water DepartmentBrewster, MA1 of 170.0340 ppt35,000
Northampton Water DepartmentNorthampton, MA1 of 310.0340 ppt28,548
Gloucester DPW Water DepartmentGloucester, MA1 of 300.0340 ppt37,715
Natick Water Department*Natick, MA12 of 4130.0330 ppt36,137
Easton Water Div*Easton, MA6 of 1650.0330 ppt23,112
PortagePortage, MI1 of 660.0320 ppt46,292
Hanover Water DepartmentHanover, MA2 of 690.0320 ppt14,899
Walpole Water DepartmentWalpole, MA2 of 630.0320 ppt23,989
North Attleboro Water Department*North Attleborough, MA6 of 1440.0300 ppt28,712
Gardner Water DepartmentGardner, MA1 of 250.0280 ppt19,314
Fort Drum*Fort Drum, NY2 of 760.0280 ppt34,400
Woburn Water Department (MWRA)Woburn, MA2 of 720.0260 ppt38,120
Webster Water DepartmentWebster, MA3 of 820.0260 ppt16,767
Concord Water DepartmentConcord, MA1 of 670.0250 ppt16,402
Leominster Water Division (MWRA)Leominster, MA1 of 440.0230 ppt40,490

* 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.

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