All water systems in Louisiana
1,216 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Baton Rouge Water Company East Baton Rouge County |
596,844 | 0 | 0 | |
|
New Orleans Carrollton Water Works Orleans County |
334,903 | 1 | 0 | |
|
E Jefferson WW District 1 Jefferson County |
275,163 | 0 | 0 | |
|
City of Shreveport Water System Caddo County |
192,378 | 3 | 0 | |
|
Lafayette Utilities Water System Lafayette County |
169,389 | 0 | 0 | |
|
W Jefferson WW District 2 Jefferson County |
140,264 | 0 | 0 | |
|
Schriever Water Treatment Service Area Terrebonne County |
116,460 | 0 | 0 | |
|
Lafourche Water District 1 Lafourche County |
81,609 | 0 | 0 | |
|
City of Bossier City Water System Bossier County |
79,506 | 1 | 0 | |
|
City of Lake Charles Water System Calcasieu County |
79,500 | 0 | 0 | |
|
Ward II Water District Livingston County |
78,147 | 0 | 0 | |
|
Tangipahoa Parish Water District Tangipahoa County |
75,873 | 2 | 1 | |
|
City of Alexandria Water System Rapides County |
66,798 | 0 | 0 | |
|
Lawco New Iberia Water System Iberia County |
59,928 | 0 | 0 | |
|
City of Monroe Water System Ouachita County |
57,000 | 3 | 0 | |
|
ST Charles Parish Dept of Waterworks St. Charles County |
52,879 | 0 | 0 | |
|
New Orleans Algiers Water Works Orleans County |
52,785 | 1 | 0 | |
|
ST Bernard Parish Waterworks St. Bernard County |
44,783 | 0 | 0 | |
|
City of Slidell Water Supply St. Tammany County |
35,547 | 0 | 0 | |
|
ST John Water District 3 St. John the Baptist County |
31,965 | 0 | 0 | |
|
City of Zachary Water System East Baton Rouge County |
31,569 | 0 | 0 | |
|
City of Natchitoches Water System Natchitoches County |
26,910 | 0 | 0 | |
|
City of Denham Springs Water System Livingston County |
25,725 | 0 | 0 | |
|
Village Water System Bossier County |
24,813 | 2 | 1 | |
|
City of Sulphur Water System Calcasieu County |
24,489 | 0 | 0 | |
|
Vermilion Waterworks District 1 Vermilion County |
24,132 | 1 | 0 | |
|
Beauregard Water Works Dist #3 Beauregard County |
24,000 | 0 | 0 | |
|
City of Ruston Water System Lincoln County |
22,468 | 1 | 1 | |
|
Assumption Parish WW District 1 Assumption County |
21,366 | 0 | 0 | |
|
City of Hammond Water System Tangipahoa County |
21,135 | 0 | 0 | |
|
Calcasieu Parish WW District NO 1 Calcasieu County |
20,837 | 0 | 0 | |
|
City of Opelousas Water System St. Landry County |
20,388 | 3 | 0 | |
|
City of Pineville Water System Rapides County |
20,358 | 1 | 1 | |
|
Rapides Parish Waterworks District 3 Rapides County |
19,983 | 0 | 0 | |
|
Belle Chasse Water District Plaquemines County |
19,644 | 0 | 0 | |
|
ST Tam Parish Bedico -Faubourg-Coquille St. Tammany County |
18,372 | 0 | 0 | |
|
Bastrop Water System Morehouse County |
18,105 | 1 | 0 | |
|
Lawco Crowley Water System Acadia County |
17,634 | 0 | 0 | |
|
ST Tam Parish Briarwood Terrace St. Tammany County |
17,536 | 1 | 1 | |
|
Gretna Waterworks Jefferson County |
17,026 | 0 | 0 | |
|
Lpwdn North Region Lafayette County |
16,833 | 0 | 0 | |
|
City of Gonzales Water System Ascension County |
16,806 | 1 | 0 | |
|
Town of Blanchard Water System Caddo County |
16,488 | 2 | 0 | |
|
City of Minden Water System Webster County |
16,281 | 0 | 0 | |
|
City of Covington Water Supply St. Tammany County |
16,185 | 3 | 0 | |
|
City of West Monroe Water System Ouachita County |
16,005 | 1 | 0 | |
|
Town of Walker Water System Livingston County |
15,813 | 1 | 0 | |
|
Lawco Eunice Water System St. Landry County |
15,471 | 0 | 0 | |
|
Lpwd South Lafayette County |
15,132 | 0 | 0 | |
|
Thibodaux Waterworks Lafourche County |
14,862 | 0 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules still in violation at EPA's latest data refresh.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Louisiana records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.