Louisiana Tap Water Quality
Explore tap water quality data for counties across Louisiana. View water system reports, track violations, monitor drinking water safety, and check fluoridation status in your community.
Total Counties
64
Communities with public water systems
Total Population
5,210,756
Residents served by public water systems
Water Systems
939
Public water systems statewide
Serious Violators
77
Systems with serious violations
Counties
64
With water systems
Population
5,210,756
Served by water systems
Water Systems
939
Total water systems
Violators
77
Systems with serious violations
Searching by your address yields the most accurate results. Searching by town or water system may not show all systems due to how the EPA categorizes data. Some towns may be listed under counties, and water system boundaries don't always align with town boundaries.
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Louisiana Counties
Acadia Parish
Population: 59,282
Water Systems: 12
Allen Parish
Population: 32,355
Water Systems: 10
Ascension Parish
Population: 31,627
Water Systems: 19
Assumption Parish
Population: 21,366
Water Systems: 1
Avoyelles Parish
Population: 51,223
Water Systems: 17
Beauregard Parish
Population: 48,460
Water Systems: 7
Bienville Parish
Population: 15,941
Water Systems: 22
Bossier Parish
Population: 137,713
Water Systems: 23
Caddo Parish
Population: 254,014
Water Systems: 43
Calcasieu Parish
Population: 206,015
Water Systems: 43
Caldwell Parish
Population: 16,224
Water Systems: 11
Cameron Parish
Population: 10,927
Water Systems: 7
Catahoula Parish
Population: 12,741
Water Systems: 8
Claiborne Parish
Population: 19,091
Water Systems: 12
Concordia Parish
Population: 26,363
Water Systems: 7
De Soto Parish
Population: 33,237
Water Systems: 11
East Baton Rouge Parish
Population: 619,906
Water Systems: 5
East Carroll Parish
Population: 8,070
Water Systems: 4
East Feliciana Parish
Population: 27,720
Water Systems: 10
Evangeline Parish
Population: 42,829
Water Systems: 14
Franklin Parish
Population: 25,752
Water Systems: 7
Grant Parish
Population: 25,342
Water Systems: 13
Iberia Parish
Population: 74,823
Water Systems: 8
Iberville Parish
Population: 40,745
Water Systems: 12
Jackson Parish
Population: 17,924
Water Systems: 20
Jefferson Davis Parish
Population: 37,966
Water Systems: 8
Jefferson Parish
Population: 490,269
Water Systems: 4
La Salle Parish
Population: 19,328
Water Systems: 13
Lafayette Parish
Population: 288,094
Water Systems: 59
Lafourche Parish
Population: 97,419
Water Systems: 2
Lincoln Parish
Population: 60,267
Water Systems: 20
Livingston Parish
Population: 155,595
Water Systems: 29
Madison Parish
Population: 13,542
Water Systems: 4
Morehouse Parish
Population: 31,992
Water Systems: 15
Natchitoches Parish
Population: 44,868
Water Systems: 13
Orleans Parish
Population: 387,688
Water Systems: 2
Ouachita Parish
Population: 186,518
Water Systems: 27
Plaquemines Parish
Population: 30,957
Water Systems: 4
Pointe Coupee Parish
Population: 30,568
Water Systems: 12
Rapides Parish
Population: 163,050
Water Systems: 22
Red River Parish
Population: 12,339
Water Systems: 11
Richland Parish
Population: 23,124
Water Systems: 10
Sabine Parish
Population: 39,346
Water Systems: 18
Saint Bernard Parish
Population: 44,000
Water Systems: 1
Saint Charles Parish
Population: 52,879
Water Systems: 1
Saint Helena Parish
Population: 10,402
Water Systems: 3
Saint James Parish
Population: 22,354
Water Systems: 4
Saint John The Baptist Parish
Population: 46,679
Water Systems: 4
Saint Landry Parish
Population: 110,748
Water Systems: 28
Saint Martin Parish
Population: 73,537
Water Systems: 16
Saint Mary Parish
Population: 62,798
Water Systems: 12
Saint Tammany Parish
Population: 243,025
Water Systems: 99
Tangipahoa Parish
Population: 114,849
Water Systems: 24
Tensas Parish
Population: 8,336
Water Systems: 5
Terrebonne Parish
Population: 117,000
Water Systems: 2
Union Parish
Population: 32,337
Water Systems: 21
Vermilion Parish
Population: 69,695
Water Systems: 11
Vernon Parish
Population: 62,422
Water Systems: 16
Washington Parish
Population: 32,885
Water Systems: 14
Webster Parish
Population: 50,239
Water Systems: 31
West Baton Rouge Parish
Population: 30,651
Water Systems: 5
West Carroll Parish
Population: 14,967
Water Systems: 7
West Feliciana Parish
Population: 19,886
Water Systems: 4
Winn Parish
Population: 18,447
Water Systems: 12