PFAS in Louisiana tap water

7 of 268 tested systems measured above the federal limit. 48 had a detection of any kind.

Every public water system below was required by the EPA to test for 29 PFAS compounds. Sorted by the highest PFOA or PFOS reading, worst first. Find yours for the full set of readings and what removes them.

Water system	Highest PFOA	Highest PFOS	Found	Against the 4 ppt limit
City of Vidalia Water System	20.1 ppt	8.5 ppt	8 of 29	Above
Village of Parks Water System	6.4 ppt	4.3 ppt	4 of 29	Above
City of Plaquemine Water System	6.2 ppt	6 ppt	5 of 29	Above
Port Sulphur Water District	none detected	4.6 ppt	2 of 29	Above
New Orleans Algiers Water Works	4 ppt	4.5 ppt	3 of 29	Above
Parish Utilities of Ascension	none detected	4.5 ppt	3 of 29	Above
New Orleans Carrollton Ww	4.1 ppt	4.2 ppt	6 of 29	Above
Abita Springs Water System	none detected	none detected	0 of 29	Within
Arcadia Water System	none detected	none detected	0 of 29	Within
Archibald Water System	none detected	none detected	0 of 29	Within
Assumption Parish Ww District 1	none detected	none detected	2 of 29	Within
Avoyelles Parish Waterworks District 1	none detected	none detected	0 of 29	Within
Avoyelles Ward One Water System Inc	none detected	none detected	0 of 29	Within
Barksdale Afb Water System	none detected	none detected	0 of 29	Within
Bastrop Water System	none detected	none detected	0 of 29	Within
Baton Rouge Water Company	none detected	none detected	0 of 29	Within
Bayou Des Cannes Water System	none detected	none detected	0 of 29	Within
Bayou Liberty Water Association	none detected	none detected	0 of 29	Within
Bayou Teche Water Works	none detected	none detected	0 of 29	Within
Beau Chene Water System	none detected	none detected	0 of 29	Within
Beauregard District No 2 Ward No 5	none detected	none detected	0 of 29	Within
Beauregard Water Works Dist #3	none detected	none detected	0 of 29	Within
Belle Chasse Water District	none detected	none detected	1 of 29	Within
Blanchard Water System	none detected	none detected	0 of 29	Within
Bogue-lusa Water Works District	none detected	none detected	0 of 29	Within
Brouillette Water System Inc	none detected	none detected	0 of 29	Within
Brownville Water System	none detected	none detected	0 of 29	Within
Buckeye Water District 50	none detected	none detected	0 of 29	Within
Cadeville Water District	none detected	none detected	0 of 29	Within
Calcasieu Parish Ww Dist 9 Carlyss	none detected	none detected	0 of 29	Within
Calcasieu Parish Ww District 7	none detected	none detected	0 of 29	Within
Calcasieu Parish Ww District 8	none detected	none detected	0 of 29	Within
Calcasieu Parish Ww District No 1	none detected	none detected	0 of 29	Within
Calcasieu Parish Ww District No 4	none detected	none detected	0 of 29	Within
Calcasieu Parish Ww District No 5	none detected	none detected	0 of 29	Within
Calhoun Water System	none detected	none detected	0 of 29	Within
Cameron Parish Ww District 11-SWEET Lake	none detected	none detected	0 of 29	Within
Cameron Parish Ww District 9	none detected	none detected	0 of 29	Within
Cecilia Water Corporation	none detected	none detected	0 of 29	Within
Chataignier Water System	none detected	none detected	0 of 29	Within
Cheniere Drew North Water System	none detected	none detected	0 of 29	Within
City of Abbeville Water System	none detected	none detected	1 of 29	Within
City of Alexandria Water System	none detected	none detected	0 of 29	Within
City of Baker Water System	none detected	none detected	0 of 29	Within
City of Bogalusa Water System	none detected	none detected	0 of 29	Within
City of Bossier City Water System	none detected	none detected	0 of 29	Within
City of Breaux Bridge Water System	none detected	none detected	0 of 29	Within
City of Broussard Water System	none detected	none detected	0 of 29	Within
City of Carencro Water System	none detected	none detected	0 of 29	Within
City of Denham Springs Water System	none detected	none detected	0 of 29	Within
City of Deridder Water System	none detected	none detected	0 of 29	Within
City of Gonzales Water System	none detected	none detected	0 of 29	Within
City of Hammond Water System	none detected	none detected	0 of 29	Within
City of Jeanerette Water System	none detected	none detected	1 of 29	Within
City of Jennings Water System	none detected	none detected	0 of 29	Within
City of Kaplan Water System	none detected	none detected	0 of 29	Within
City of Lake Charles Water System	none detected	none detected	0 of 29	Within
City of Leesville Water System	none detected	none detected	0 of 29	Within
City of Many Water System	none detected	none detected	1 of 29	Within
City of Marksville Water System	none detected	none detected	0 of 29	Within
City of Oakdale Water System	none detected	none detected	0 of 29	Within
City of Opelousas Water System	none detected	none detected	0 of 29	Within
City of Pineville Water System	none detected	none detected	0 of 29	Within
City of Rayne Water System	none detected	none detected	0 of 29	Within
City of Scott Water System	none detected	none detected	0 of 29	Within
City of St Martinville Water System	none detected	none detected	0 of 29	Within
City of Ville Platte Water System	none detected	none detected	0 of 29	Within
City of Winnfield Water System	none detected	none detected	0 of 29	Within
City of Youngsville Purchase Ws	none detected	none detected	0 of 29	Within
Concordia Waterworks District 1	none detected	none detected	0 of 29	Within
Consolidated Waterworks District 2	none detected	none detected	0 of 29	Within
Coushatta Water System	none detected	none detected	0 of 29	Within
Covington Water Supply	none detected	none detected	0 of 29	Within
Crowley Water System (lawco)	none detected	none detected	0 of 29	Within
Culbertson Water System	none detected	none detected	0 of 29	Within
Cypress Black Bayou Water System	none detected	none detected	0 of 29	Within
Delhi Water Supply	none detected	none detected	0 of 29	Within
Deltech Corporation	none detected	none detected	0 of 29	Within
Dequincy Water System (lawco)	none detected	none detected	0 of 29	Within
Desoto Parish Water Works District 1	none detected	none detected	2 of 29	Within
Dow Usa, la Division	none detected	none detected	0 of 29	Within
Doyline Waterworks District 1	none detected	none detected	0 of 29	Within
Dubach Water System	none detected	none detected	0 of 29	Within
E Jefferson Ww District 1	none detected	none detected	1 of 29	Within
East Carroll Ws South	none detected	none detected	0 of 29	Within
East Central Vernon Water System	none detected	none detected	0 of 29	Within
East Feliciana Rural Gurley Rd Ws	none detected	none detected	0 of 29	Within
East Side Water System	none detected	none detected	0 of 29	Within
Ebarb Wwks Dist # 1 - Aimwell Area	none detected	none detected	0 of 29	Within
Egan Water Corporation	none detected	none detected	0 of 29	Within
Eunice Water System (lawco)	none detected	none detected	0 of 29	Within
Fairview Union Water System	none detected	none detected	0 of 29	Within
False River Water Company	none detected	none detected	0 of 29	Within
Farmerville Water System	none detected	none detected	2 of 29	Within
Fifth Ward Water System	none detected	none detected	0 of 29	Within
Folsom Water Supply	none detected	none detected	0 of 29	Within
Forest Hill Utilities	none detected	none detected	0 of 29	Within
Fort Polk North Water System	none detected	none detected	0 of 29	Within
Fort Polk South Water System	none detected	none detected	0 of 29	Within
Franklin Water Supply	none detected	none detected	1 of 29	Within
Fswc - Hammond Heights	none detected	none detected	0 of 29	Within
Gardner Community Water System	none detected	none detected	0 of 29	Within
Gillis Long Center	none detected	none detected	0 of 29	Within
GOWC East	none detected	none detected	0 of 29	Within
Gowc North Water System	none detected	none detected	0 of 29	Within
Grambling State University Ws	none detected	none detected	0 of 29	Within
Grambling Water System	none detected	none detected	0 of 29	Within
Gramercy Waterworks	none detected	none detected	1 of 29	Within
Greater Ward 1 Waterworks District	none detected	none detected	0 of 29	Within
Greensburg Water System	none detected	none detected	0 of 29	Within
Gretna Waterworks	none detected	none detected	1 of 29	Within
Henderson Nina Water System Inc	none detected	none detected	0 of 29	Within
Homer Water System, la	none detected	none detected	0 of 29	Within
Houma Water Treatment Service Area	none detected	none detected	2 of 29	Within
Houston River Waterworks District 11	none detected	none detected	0 of 29	Within
Iberia Water Works District 3 - Coteau	none detected	none detected	0 of 29	Within
Iberville Waterworks District #2	none detected	none detected	0 of 29	Within
Intracoastal Water System West	none detected	none detected	1 of 29	Within
Jeff Davis Central Waterworks District	none detected	none detected	0 of 29	Within
Jeff Davis Water and Sewer Commission 1	none detected	none detected	0 of 29	Within
Jeff Davis Water District 4	none detected	none detected	0 of 29	Within
Jonesboro Water System, la	none detected	none detected	0 of 29	Within
Keatchie Water System	none detected	none detected	0 of 29	Within
Kiroli Darbonne Ws	none detected	none detected	0 of 29	Within
Kolin Ruby Wise Waterwork District 11 A	none detected	none detected	0 of 29	Within
Lafayette Utilities Water System	none detected	none detected	0 of 29	Within
Lafourche Water District 1	none detected	none detected	1 of 29	Within
Lake Providence Water System	none detected	none detected	0 of 29	Within
Lawtell Water Works District No 1	none detected	none detected	0 of 29	Within
Lee Road Water Corporation	none detected	none detected	0 of 29	Within
Lena Water System Inc	none detected	none detected	0 of 29	Within
Lewisburg Bellevue Water System	none detected	none detected	0 of 29	Within
Louisiana State Penitentiary	none detected	none detected	0 of 29	Within
Lpwd North Production Facility	none detected	none detected	0 of 29	Within
Lpwd South	none detected	none detected	0 of 29	Within
Lpwdn North Region	none detected	none detected	0 of 29	Within
Lutcher Waterworks	none detected	none detected	1 of 29	Within
Magnolia Plantation Water System Inc	none detected	none detected	0 of 29	Within
Magnolia Water Utilities - Eden Isles	none detected	none detected	0 of 29	Within
Magnolia Water Utilities - Greenleaves	none detected	none detected	0 of 29	Within
Magnolia Water Utilities - the Meadows	none detected	none detected	0 of 29	Within
Mandeville Water Supply	none detected	none detected	0 of 29	Within
Mansfield Water System	none detected	none detected	1 of 29	Within
Milton Purchase Water System	none detected	none detected	0 of 29	Within
Minden Water System	none detected	none detected	0 of 29	Within
Mire Branch Water Corporation	none detected	none detected	0 of 29	Within
Monroe Water System, la	none detected	none detected	1 of 29	Within
Monterey Rural Water System Inc	none detected	none detected	0 of 29	Within
Morgan City Water System, la	none detected	none detected	0 of 29	Within
Natchitoches Parish Wwks District 2	none detected	none detected	0 of 29	Within
Natchitoches Water System	none detected	none detected	1 of 29	Within
New Carroll Water System	none detected	none detected	0 of 29	Within
New Iberia Water System (lawco)	none detected	none detected	0 of 29	Within
New Llano Water Department	none detected	none detected	0 of 29	Within
New Roads Water System	none detected	none detected	0 of 29	Within
North Desoto Water System	none detected	none detected	0 of 29	Within
North Franklin Water Works	none detected	none detected	0 of 29	Within
North Iberville Water System	none detected	none detected	0 of 29	Within
North of Crowley Water Corporation	none detected	none detected	0 of 29	Within
Patterson Water System	none detected	none detected	2 of 29	Within
Pinehill Waterworks District	none detected	none detected	1 of 29	Within
Plaisance Water System	none detected	none detected	0 of 29	Within
Pleasant Valley Water System	none detected	none detected	0 of 29	Within
Pointe Coupee Water Works District 1	none detected	none detected	1 of 29	Within
Pollock Area Water System Inc	none detected	none detected	0 of 29	Within
Pontchatoula Water System	none detected	none detected	0 of 29	Within
Port Allen Water System	none detected	none detected	0 of 29	Within
Prairie Ronde Water System Inc	none detected	none detected	0 of 29	Within
Rapides Island Water Association Inc	none detected	none detected	0 of 29	Within
Rapides Parish Waterworks District 3	none detected	none detected	0 of 29	Within
Rayville Water System	none detected	none detected	1 of 29	Within
Resolve Whisperwood Estates Sd Ws	none detected	none detected	0 of 29	Within
Rural Franklinton Water	none detected	none detected	0 of 29	Within
Ruston Water System	none detected	none detected	0 of 29	Within
Sabine Parish Water District 1	none detected	none detected	0 of 29	Within
Savoy Swords Water System Inc	none detected	none detected	0 of 29	Within
Schriever Water Treatment Service Area	none detected	none detected	2 of 29	Within
Shreveport Water System	none detected	none detected	1 of 29	Within
Slidell Water Supply	none detected	none detected	0 of 29	Within
South Claiborne Water System	none detected	none detected	0 of 29	Within
South Grant Water Corporation	none detected	none detected	0 of 29	Within
South Monroe Ws Gowc	none detected	none detected	0 of 29	Within
South Rayne Water Corporation	none detected	none detected	0 of 29	Within
South Toledo Bend Water District	none detected	none detected	1 of 29	Within
South Vernon Parish Waterworks District	none detected	none detected	0 of 29	Within
Southeast Waterworks District 2	none detected	none detected	0 of 29	Within
Southwest Allen Ww District No 2	none detected	none detected	1 of 29	Within
Southwest Ouachita Waterworks, Inc	none detected	none detected	0 of 29	Within
Springhill Water System	none detected	none detected	0 of 29	Within
St Bernard Parish Waterworks	none detected	none detected	0 of 29	Within
St Charles Parish Dept of Waterworks	none detected	none detected	1 of 29	Within
St James Water District 1	none detected	none detected	0 of 29	Within
St James Water District 2	none detected	none detected	1 of 29	Within
St John Water District 3	none detected	none detected	0 of 29	Within
St John Water District 1	none detected	none detected	1 of 29	Within
St John Water District 2	none detected	none detected	2 of 29	Within
St Landry Water Works District 2 Rural	none detected	none detected	0 of 29	Within
St Mary Parish W&s #2 Bayou Vista	none detected	none detected	3 of 29	Within
St Mary Water & Sewer Comm #3	none detected	none detected	1 of 29	Within
St Tam Parish - Briarwood Terrace	none detected	none detected	0 of 29	Within
St Tam Parish - Cross Gates Sd	none detected	none detected	1 of 29	Within
St Tam Parish-faubourg-coquille	none detected	none detected	0 of 29	Within
St Tammany Water Dist 2	none detected	none detected	0 of 29	Within
Sulphur City of Water System	none detected	none detected	0 of 29	Within
Summerville Water System	none detected	none detected	0 of 29	Within
Tallulah Water System	none detected	none detected	0 of 29	Within
Tangipahoa (second Ward) Water District	none detected	none detected	0 of 29	Within
Tangipahoa Parish Water District	none detected	none detected	0 of 29	Within
Tensas Water District Association	none detected	none detected	1 of 29	Within
Tesi Ossun Heights	none detected	none detected	0 of 29	Within
Thibodaux Waterworks	none detected	none detected	0 of 29	Within
Town & Country Service	none detected	none detected	1 of 29	Within
Town of Albany Water System	none detected	none detected	0 of 29	Within
Town of Amite Water System	none detected	none detected	0 of 29	Within
Town of Arnaudville Water System	none detected	none detected	0 of 29	Within
Town of Benton Water System	none detected	none detected	1 of 29	Within
Town of Berwick	none detected	none detected	1 of 29	Within
Town of Bunkie Water System	none detected	none detected	0 of 29	Within
Town of Church Point Water System	none detected	none detected	0 of 29	Within
Town of Erath Water System	none detected	none detected	0 of 29	Within
Town of Ferriday Water System	none detected	none detected	0 of 29	Within
Town of Franklinton Water System	none detected	none detected	0 of 29	Within
Town of Greenwood Water System	none detected	none detected	1 of 29	Within
Town of Haughton Water System	none detected	none detected	0 of 29	Within
Town of Iowa Water System	none detected	none detected	0 of 29	Within
Town of Jena Water System	none detected	none detected	0 of 29	Within
Town of Lake Arthur Water System	none detected	none detected	0 of 29	Within
Town of Leonville Water System	none detected	none detected	0 of 29	Within
Town of Livingston Water System	none detected	none detected	0 of 29	Within
Town of Mamou Water System	none detected	none detected	0 of 29	Within
Town of Maringouin	none detected	none detected	0 of 29	Within
Town of Pearl River	none detected	none detected	0 of 29	Within
Town of Plaucheville Water Systm	none detected	none detected	0 of 29	Within
Town of Port Barre Water System	none detected	none detected	0 of 29	Within
Town of Sunset Water System	none detected	none detected	0 of 29	Within
Town of Vinton Water System	none detected	none detected	0 of 29	Within
Town of Welsh Water System	none detected	none detected	0 of 29	Within
Town of Woodworth Water System	none detected	none detected	0 of 29	Within
United Water System	none detected	none detected	0 of 29	Within
Utilities Inc - Kingspoint Subdivision	none detected	none detected	0 of 29	Within
Utilities Inc - North Park Water Supply	none detected	none detected	0 of 29	Within
Varnado Water Works	none detected	none detected	0 of 29	Within
Varnado Water Works - Pine	none detected	none detected	0 of 29	Within
Vermilion Waterworks District 1	none detected	none detected	0 of 29	Within
Vernon Parish Water and Sewer Commission	none detected	none detected	0 of 29	Within
Village of Turkey Creek Water System	none detected	none detected	0 of 29	Within
Village Water System	none detected	none detected	1 of 29	Within
Vivian Water System	none detected	none detected	0 of 29	Within
W Jefferson Ww District 2	none detected	none detected	1 of 29	Within
Walker Water System	none detected	none detected	0 of 29	Within
Ward II Water District	none detected	none detected	0 of 29	Within
Water & Sewer Commission 4 of St Mary	none detected	none detected	1 of 29	Within
Waterworks District 7	none detected	none detected	0 of 29	Within
Wbr District 4 -section Road Winterville	none detected	none detected	0 of 29	Within
Wbr Public Utilities	none detected	none detected	0 of 29	Within
Wesley Chapel Water System	none detected	none detected	0 of 29	Within
West Baton Rouge Water Works District 2	none detected	none detected	0 of 29	Within
West Feliciana Consol Wwks District 13	none detected	none detected	0 of 29	Within
West Grant Water Association	none detected	none detected	0 of 29	Within
West Hwy 80 Ark Road Ws	none detected	none detected	0 of 29	Within
West Monroe Water System	none detected	none detected	0 of 29	Within
West Vernon Parish Waterworks District	none detected	none detected	0 of 29	Within
Westlake City of Water System	none detected	none detected	0 of 29	Within
Westview Water Works	none detected	none detected	0 of 29	Within
Westwego Waterworks	none detected	none detected	0 of 29	Within
Winnsboro Water System	none detected	none detected	0 of 29	Within
Wwks District 2 of St Helena	none detected	none detected	0 of 29	Within
Zachary Water System	none detected	none detected	0 of 29	Within

All 268 systems the EPA tested in Louisiana, every one of them with its own page. Each was tested for 29 PFAS compounds.

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Source, the EPA’s fifth Unregulated Contaminant Monitoring Rule, final dataset published 2026-10-15. Original data →