Louisiana tap water, by utility.

278 utilities with a full report, serving 4.7 million people as they report it. Regulated PFAS turned up at 11 of them.

Louisiana utilities by population served
Utility	Based in	Serves	Regulated PFAS	Health-based violations since 2016
Baton Rouge Water Company	Baton Rouge	596,844	None found	0
New Orleans Carrollton Water Works	New Orleans	334,903	PFOA, PFOS, HFPO-DA	1
E Jefferson Ww District 1	Jefferson	275,163	None found	0
City of Shreveport Water System	Shreveport	192,378	None found	23
Lafayette Utilities Water System	Lafayette	169,389	None found	0
W Jefferson Ww District 2	Jefferson	140,264	None found	1
Schriever Water Treatment Service Area	Houma	116,460	None found	0
Lafourche Water District 1	Lockport	81,609	None found	0
City of Bossier City Water System	Bossier City	79,506	None found	0
City of Lake Charles Water System	Lake Charles	79,500	None found	0
Ward II Water District	Denham Springs	78,147	None found	0
Tangipahoa Parish Water District	Natalbany	75,873	None found	1
City of Alexandria Water System	Alexandria	66,798	None found	1
Lawco - New Iberia Water System	Baton Rouge	59,928	None found	0
City of Monroe Water System	Monroe	57,000	None found	6
St Charles Parish Dept of Waterworks	Luling	52,879	None found	0
New Orleans Algiers Water Works	New Orleans	52,785	PFOA, PFOS	7
St Bernard Parish Waterworks	Chalmette	44,783	None found	2
Slidell Water Supply	Slidell	35,547	None found	1
St John Water District 3	Laplace	31,965	None found	0
Zachary Water System	Zachary	31,569	None found	0
City of Natchitoches Water System	Natchitoches	27,693	None found	1
City of Denham Springs Water System	Denham Springs	25,725	None found	0
Sulphur City of Water System	Sulphur	24,489	None found	1
Vermilion Waterworks District 1	Maurice	24,132	None found	10
Beauregard Water Works Dist #3	Longville	24,000	None found	0
City of Ruston Water System	Ruston	22,468	None found	0
Assumption Parish Ww District 1	Napoleonville	21,366	None found	3
City of Hammond Water System	Hammond	21,135	None found	2
Calcasieu Parish Ww District No 1	Lake Charles	20,837	None found	0
City of Opelousas Water System	Opelousas	20,388	None found	7
City of Pineville Water System	Pineville	20,358	None found	16
Rapides Parish Waterworks District 3	Tioga	19,983	None found	0
Belle Chasse Water District	Belle Chasse	19,644	None found	0
St Tam Parish - Bedico - Faubourg - Coquille	Covington	18,372	None found	0
Bastrop Water System	Bastrop	18,105	None found	1
Lawco - Crowley Water System	Baton Rouge	17,733	None found	0
St Tam Parish - Briarwood Terrace	Covington	17,536	None found	0
Gretna Waterworks	Gretna	17,026	None found	0
Lpwdn North Region	Lafayette	16,833	None found	1
City of Gonzales Water System	Gonzales	16,806	None found	0
Town of Blanchard Water System	Blanchard	16,326	None found	2
City of Minden Water System	Minden	16,281	None found	2
City of Covington Water Supply	Covington	16,185	None found	1
West Monroe Water System	West Monroe	16,005	None found	12
Town of Walker Water System	Walker	15,813	None found	1
Lawco - Eunice Water System	Baton Rouge	15,393	None found	0
Lpwd South	Duson	15,132	None found	0
Thibodaux Waterworks	Thibodaux	14,862	None found	0
East Feliciana Rural Water	Ethel	14,829	None found	0
West Hwy 80 Ark Road WS	West Monroe	14,649	None found	6
Calcasieu Parish Ww Dist 9 Carlyss	Sulphur	14,502	None found	0
City of Deridder Water System	Deridder	14,400	None found	1
City of Abbeville Water System	Abbeville	14,217	PFHxS	3
City of Plaquemine Water System	Plaquemine	14,043	PFOA, PFOS, PFBS	0
City of Bogalusa Water System	Bogalusa	14,000	None found	12
City of Baker Water System	Baker	13,855	None found	1
West Baton Rouge Water Works District 2	Port Allen	13,437	None found	0
Gowc North Water System	West Monroe	13,287	None found	0
Barksdale AFB Water System	Barksdale AFB	13,000	None found	0
City of Mandeville Water Supply	Mandeville	13,000	None found	0
Village of Parks Water System	Parks	12,801	PFOA, PFOS	11
City of Morgan City Water System	Morgan City	12,703	None found	3
Cecilia Water Corporation	Cecilia	12,420	None found	7
Buckeye Water District 50	Deville	12,078	None found	0
West Feliciana Consol Wwks District 13	St. Francisville	12,045	None found	1
Gowc East Water System	West Monroe	11,742	None found	0
Houma Water Treatment Service Area	Houma	11,658	None found	1
City of Carencro Water System	Carencro	11,301	None found	1
Utilities Inc - North Park Water Supply	Mandeville	11,298	None found	0
Cheniere Drew North Water System	West Monroe	11,280	None found	0
City of Rayne Water System	Rayne	10,908	None found	0
Fort Polk South Water System	Fort Polk	10,902	None found	0
Village Water System	Benton	10,890	PFBS	19
Bayou Liberty Water Association	Slidell	10,791	None found	0
Southwest Ouachita Waterworks, Inc	West Monroe	10,725	None found	30
Pointe Coupee Water Works District 1	New Roads	10,629	None found	2
City of Youngsville Water System	Youngsville	10,614	Not sampled	4
City of Leesville Water System	Leesville	10,545	None found	4
St John Water District 1	Laplace	10,484	None found	1
Port Sulphur Water District	Belle Chasse	10,308	PFOS	26
City of Broussard Purchase Water System	Broussard	10,242	Not sampled	1
Milton Water System	Milton	10,200	Not sampled	0
Magnolia - Eden Isles	Des Peres	10,155	None found	0
Bayou Teche Water Works	Loreauville	10,137	None found	5
City of Breaux Bridge Water System	Breaux Bridge	10,098	None found	2
City of Jennings Water System	Jennings	9,837	None found	3
Jeff Davis Water and Sewer Commission 1	Lake Arthur	9,780	None found	0
Parish Utilities of Ascension	Donaldsonville	9,732	PFOS, PFBS	8
Water & Sewer Commission 4 of St Mary	Charenton	9,709	None found	5
City of Scott Water System	Scott	9,696	None found	1
Brownville Water System	West Monroe	9,696	None found	12
Town of Leonville Water System	Leonville	9,552	None found	8
Mire Branch Water Corporation	Church Point	9,480	None found	0
Fort Polk North Water System	Fort Polk	9,420	None found	0
Kiroli Darbonne WS	West Monroe	9,210	None found	1
Town of New Roads Water System	New Roads	9,024	None found	2
Town of Livingston Water System	Livingston	8,946	None found	0
Iberia Water Works District 3 - Coteau	New Iberia	8,775	None found	5
Wwks District 2 of St Helena	Greensburg	8,772	None found	0
Magnolia Plantation Water System Inc	Abbeville	8,769	None found	0
Tallulah Water System	Tallulah	8,601	None found	28
Westwego Waterworks	Westwego	8,534	None found	1
City of Patterson Water System	Patterson	8,456	None found	6
Natchitoches Parish Wwks District 2	Natchez	8,415	None found	0
City of Franklin Water Supply	Franklin	8,325	None found	49
Lewisburg Bellevue Water System	Opelousas	8,226	None found	0
Southwest Allen Ww District No 2	Kinder	8,106	None found	29
Town of Benton Water System	Benton	8,037	None found	0
St Tam Parish - Cross Gates SD	Covington	8,037	None found	1
Magnolia - Greenleaves	Des Peres	8,031	None found	0
North Franklin Water Works	Crowville	7,989	None found	2
St Mary Water & Sewer Comm #3	Centerville	7,828	None found	3
Springhill Water System	Springhill	7,800	None found	2
Lee Road Water Corporation	Covington	7,665	None found	0
City of Youngsville Purchase WS	Youngsville	7,623	None found	1
North Desoto Water System	Stonewall	7,608	None found	0
City of Marksville Water System	Marksville	7,593	None found	0
Winnsboro Water System	Winnsboro	7,518	None found	11
St James Water District 2	Convent	7,513	None found	1
City of Mansfield Water System	Mansfield	7,512	None found	23
South Monroe WS Gowc	West Monroe	7,335	None found	12
Savoy Swords Water System Inc	Eunice	7,326	None found	2
Town of Albany Water System	Albany	7,305	None found	0
City of St Martinville Water System	St. Martinville	7,263	None found	8
St James Water District 1	Convent	7,200	None found	0
City of Winnfield Water System	Winnfield	7,194	None found	11
Desoto Parish Water Works District 1	Mansfield	7,173	None found	8
Sabine Parish Water District 1	Many	6,924	None found	15
Concordia Waterworks District 1	Ferriday	6,921	None found	2
Houston River Waterworks District 11	Sulphur	6,915	None found	1
Magnolia - Resolve Whisperwood	Des Peres	6,867	None found	0
Calcasieu Parish Ww District 8	Lake Charles	6,834	None found	0
Southeast Waterworks District 2	Abbeville	6,810	None found	0
City of Port Allen Water System	Port Allen	6,759	None found	1
Ebarb Wwks Dist # 1 - Aimwell Area	Zwolle	6,738	None found	29
East Iberville Water System	Plaquemine	6,657	None found	0
City of Pontchatoula Water System	Ponchatoula	6,657	None found	0
Beauregard District No 2 Ward No 5	Singer	6,613	None found	0
City of Ville Platte Water System	Ville Platte	6,590	None found	5
Intracoastal Water System West	Plaquemine	6,489	None found	15
Plaisance Water System	Opelousas	6,465	None found	2
East Central Vernon Water System	Slagle	6,363	None found	0
Louisiana State Penitentiary	Angola	6,362	None found	0
Town of Vidalia Water System	Vidalia	6,354	PFOA, PFOS, PFNA, PFBS	1
Utilities Inc - Kingspoint Subdivision	Mandeville	6,351	None found	0
Town of Jonesboro Water System	Jonesboro	6,231	None found	35
Cadeville Water District	West Monroe	6,219	None found	33
City of Jeanerette Water System	Jeanerette	6,189	None found	1
City of Oakdale Water System	Oakdale	6,114	None found	6
Prairie Ronde Water System Inc	Lawtell	6,090	None found	2
Grambling State University WS	Grambling	6,000	None found	6
South Toledo Bend Water District	Many	5,943	None found	26
City of Lake Providence Water System	Lake Providence	5,850	None found	25
Waterworks District 7	Keithville	5,817	None found	0
Magnolia - Town & Country Service	Des Peres	5,715	None found	0
Jeff Davis Central Waterworks District	Welsh	5,709	None found	0
Fifth Ward Water System	Marksville	5,676	None found	1
Rapides Island Water Association Inc	Boyce	5,658	None found	0
East Side Water System	Ville Platte	5,640	None found	4
Wbr District 4 - Section Road Winterville	Port Allen	5,571	None found	0
Henderson Nina Water System Inc	Breaux Bridge	5,535	None found	1
Cypress Black Bayou Water System	Benton	5,520	None found	0
St Mary Parish W&S #2 Bayou Vista	Patterson	5,379	None found	0
Lawco - Dequincy Water System	Baton Rouge	5,370	None found	0
Town of Haughton Water System	Haughton	5,355	None found	8
Town of Farmerville Water System	Farmerville	5,352	None found	42
Calcasieu Parish Ww District No 4	Westlake	5,340	None found	7
Egan Water Corporation	Egan	5,337	None found	17
Vernon Parish Water and Sewer Commission	New Llano	5,295	None found	1
Village of Turkey Creek Water System	Turkey Creek	5,289	None found	0
South Grant Water Corporation	Bentley	5,289	None found	0
Monterey Rural Water System Inc	Monterey	5,250	None found	2
Town of Greenwood Water System	Greenwood	5,205	None found	8
St Tammany Water District #2	Covington	5,200	None found	0
Town of Bunkie Water System	Bunkie	5,169	None found	0
City of Broussard Water System	Broussard	5,151	None found	2
Calcasieu Parish Ww District No 5	Lake Charles	5,088	None found	0
City of Berwick	Berwick	5,024	None found	1
Kolin Ruby Wise Waterwork District 11 A	Pineville	4,992	None found	0
Town of Grambling Water System	Grambling	4,949	None found	12
Pinehill Waterworks District	Shreveport	4,926	None found	7
Westlake City of Water System	Westlake	4,858	None found	4
Town of Rayville Water System	Rayville	4,842	PFHxS	32
Fourth Ward Water Works	Albany	4,839	Not sampled	6
Town of Woodworth Water System	Woodworth	4,818	None found	0
Calcasieu Parish Ww District 7	Dequincy	4,791	None found	0
Town of Lutcher Waterworks	Lutcher	4,781	None found	5
St Landry Water Works District 2 Rural	Sunset	4,761	None found	2
Magnolia - the Meadows	Des Peres	4,701	None found	0
Beau Chene Water System	Mandeville	4,650	None found	0
Bayou Des Cannes Water System	Basile	4,578	None found	0
Gardner Community Water System	Boyce	4,566	None found	0
Town of Mamou Water System	Mamou	4,559	None found	24
Colyell Community Water	Livingston	4,544	Not sampled	0
Town of Homer Water System	Denham Springs	4,524	None found	14
United Water System	Arnaudville	4,446	None found	17
Keatchie Water System	Grand Cane	4,446	None found	21
Town of Many Water System	Many	4,428	None found	8
West Vernon Parish Waterworks District	Anacoco	4,365	None found	1
Town of Sunset Water System	Sunset	4,356	None found	5
City of Kaplan Water System	Kaplan	4,340	None found	1
Wbr Public Utilities	Port Allen	4,329	None found	0
Town of Welsh Water System	Welsh	4,311	None found	1
Town of Amite Water System	Amite	4,300	None found	1
Utilities Inc - Hammond Heights	Mandeville	4,281	None found	1
South Rayne Water Corporation	Rayne	4,254	None found	3
Village of Plaucheville Water System	Plaucheville	4,233	None found	0
Varnado Water Works	Angie	4,230	None found	0
Archibald Water System	Archibald	4,200	None found	0
Bogue - Lusa Water Works District	Angie	4,200	None found	0
Jeff Davis Water District 4	Jennings	4,194	None found	0
City of Broussard Hwy 90 Water System	Broussard	4,182	Not sampled	2
Town of Church Point Water System	Church Point	4,176	None found	5
Town of Franklinton Water System	Franklinton	4,150	None found	6
Magnolia - Lakeshore Estates	Des Peres	4,146	Not sampled	2
Town of Arcadia Water System	Arcadia	4,146	None found	9
Lpwd North Production Facility	Lafayette	4,122	None found	0
Tangipahoa (Second Ward) Water District	Natalbany	4,112	None found	0
Town of Vinton Water System	Vinton	4,101	None found	0
South Vernon Parish Waterworks District	Rosepine	4,083	None found	1
Wesley Chapel Water System	Ruston	4,080	None found	0
Town of Delhi Water Supply	Delhi	4,071	None found	0
Town of Vivian Water System	Vivian	4,050	None found	3
Lpwdn South Region	Lafayette	4,032	Not sampled	0
North of Crowley Water Corporation	Rayne	4,020	None found	5
Town of Arnaudville Water System	Arnaudville	3,957	None found	0
Avoyelles Parish Waterworks District 1	Bordelonville	3,900	None found	1
Pollock Area Water System Inc	Pollock	3,900	None found	0
Tensas Water District Association	St Joseph	3,843	None found	14
South Claiborne Water System	Athens	3,843	None found	0
Town of Port Barre Water System	Port Barre	3,828	None found	0
Town of Ferriday Water System	Ferriday	3,816	None found	77
Brouillette Water System Inc	Marksville	3,732	None found	0
Avoyelles Ward One Water System Inc	Effie	3,726	None found	1
Lawtell Water Works District No 1	Lawtell	3,717	None found	1
St John Water District 2	Laplace	3,702	PFBS	1
Town of Abita Springs Water System	Abita Springs	3,693	None found	1
Town of Iowa Water System	Iowa	3,636	None found	0
Town of Jena Water System	Jena	3,614	None found	4
Town of Haynesville Water System	Haynesville	3,600	Not sampled	3
Village of Forest Hill	Forest Hill	3,600	None found	0
West Allen Parish Water System	Reeves	3,582	Not sampled	3
Lena Water System Inc	Lena	3,540	None found	3
Walnut Bayou Water Association	Tallulah	3,531	Not sampled	10
River Road Water System	Rayville	3,510	Not sampled	18
New Carroll Water System	Kilbourne	3,507	None found	11
Cameron Parish Ww District 11 - Sweet Lake	Bell City	3,507	None found	4
Consolidated Waterworks District 2	Bastrop	3,498	None found	1
Point Blue/Chataiginer Water System	Ville Platte	3,471	Not sampled	5
Rural Franklinton Water	Franklinton	3,450	None found	0
Town of Maurice Water System	Maurice	3,450	Not sampled	0
Turkey Creek Water System	Gilbert	3,429	Not sampled	15
Town of Pearl River	Pearl River	3,333	None found	0
Greater Ward 1 Waterworks District	Ruston	3,333	None found	4
West Grant Water Association	Alanta	3,324	None found	7
Town of Coushatta Water System	Coushatta	3,300	None found	7
Town of Maringouin	Maringouin	3,300	None found	1
Culbertson Water System	Choudrant	3,300	None found	18
Town of New Llano Water System	New Llano	3,300	None found	8
Milton Purchase Water System	Milton	3,300	None found	0
Town of Erath Water System	Erath	2,985	None found	0
Town of Gramercy Waterworks	Gramercy	2,860	None found	5
Town of Lake Arthur Water System	Lake Arthur	2,706	None found	0
Fairview Union Water System	Coushatta	2,346	None found	84
Folsom Water Supply	Folsom	1,992	None found	1
Pleasant Valley Water System	Minden	1,683	None found	1
North Iberville Water System	Plaquemine	1,524	None found	0
Summerville Water System	Jena	1,425	None found	0
Village of Greensburg Water System	Greensburg	1,340	None found	9
Village of Dubach Water System	Dubach	1,218	None found	28
Westview Water Works	Amite	1,134	None found	5
East Carroll WS South	Transylvania	1,071	None found	10
Doyline Waterworks District 1	Doyline	969	None found	6
Cameron Parish Ww District 9	Grand Chenier	871	None found	29
Varnado Water Works - Pine	Angie	840	None found	0
Gillis Long Center	Carville	600	None found	1
Magnolia - Ossun Heights	Des Peres	393	None found	0
Utilities EPA sampled under UCMR 5, plus any other community system serving 3,300 people or more. Smaller systems appear in ZIP code results. Data: EPA SDWIS 2026 Q2 and UCMR 5.