Louisiana
976 Utilities
Serving: 4,972,000
Data available: 2014-2019
Contaminants Found: 91
EWG's drinking water quality report for Louisiana shows results of tests conducted by the water utilities in Louisiana and provided to EWG by the Louisiana Department of Health and Hospitals.
Below are utilities in Louisiana serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.
Large utilities in Louisiana
Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Louisiana
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 in Louisiana
The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.
Utility | Location | People Served | Violation Points |
---|---|---|---|
Southwest Ouachita Waterworks Inc. | West Monroe, LA | 10,092 | 75 |
Brownville Water System | West Monroe, LA | 10,872 | 55 |
North Monroe Et Al Water System | West Monroe, LA | 10,866 | 50 |
Lakeshore Swartz Water System | West Monroe, LA | 11,330 | 40 |
West Hwy 80 Ark Road WS | West Monroe, LA | 13,386 | 20 |
City of Opelousas Water System | Opelousas, LA | 20,229 | 6 |
Houma Water Treatment Service Area | Houma, LA | 31,560 | 6 |
Cecilia Water Corporation | Cecilia, LA | 11,529 | 5 |
Village of Parks Water System | Parks, LA | 12,360 | 5 |
West Monroe Water System | West Monroe, LA | 15,930 | 5 |
Water Works District #1 of Vermilion | Maurice, LA | 21,600 | 5 |
New Orleans Algiers Water Works | New Orleans, LA | 52,785 | 5 |
City of Youngsville Purchase Ws | Youngsville, LA | 14,259 | 2 |
Beauregard Water Works District #3 | Dry Creek, LA | 21,600 | 2 |
Covington Water Supply | Covington, LA | 14,700 | 1 |
Sulphur Water System | Sulphur, LA | 20,632 | 1 |
Contaminants found in Louisiana above health guidelines
Found above health guidelines | Found | ||||||
---|---|---|---|---|---|---|---|
Contaminant | # of Utilities | People Served | # of Utilities | People Served | |||
Haloacetic acids (HAA5) | 957 | 4,964,990 | 960 | 4,967,441 | |||
Total trihalomethanes (TTHMs) | 917 | 4,914,916 | 931 | 4,954,595 | |||
Dichloroacetic acid | 907 | 4,882,699 | 939 | 4,938,966 | |||
Trichloroacetic acid | 879 | 4,817,048 | 899 | 4,845,061 | |||
Dibromoacetic acid | 901 | 4,785,943 | 903 | 4,786,972 | |||
Chloroform | 840 | 4,757,184 | 922 | 4,921,865 | |||
Bromodichloromethane | 854 | 4,213,842 | 861 | 4,217,996 | |||
Radium, combined (-226 & -228) | 715 | 4,024,564 | 709 | 4,030,434 | |||
Dibromochloromethane | 813 | 3,985,442 | 833 | 4,140,735 | |||
Arsenic | 391 | 3,503,229 | 380 | 3,498,137 | |||
Haloacetic acids (HAA9) | 135 | 2,660,395 | 145 | 3,434,645 | |||
Chromium (hexavalent) | 106 | 2,388,122 | 125 | 3,249,627 | |||
Bromoform | 433 | 1,834,986 | 585 | 2,922,285 | |||
Nitrate and nitrite | 155 | 1,635,244 | 666 | 4,356,497 | |||
Chlorate | 27 | 926,543 | 84 | 2,113,309 | |||
Atrazine | 29 | 917,501 | 41 | 1,263,513 | |||
Manganese | 191 | 866,956 | 863 | 4,739,174 | |||
Uranium | 16 | 620,427 | 65 | 1,346,538 | |||
Nitrate | 21 | 293,796 | 25 | 313,227 | |||
Aluminum | 17 | 257,951 | 465 | 4,011,761 | |||
Benzo[a]pyrene | 8 | 31,362 | 12 | 585,741 | |||
Cadmium | 7 | 28,692 | 7 | 28,692 | |||
Tetrachloroethylene (perchloroethylene) | 3 | 23,754 | 3 | 23,754 | |||
Barium | 11 | 19,420 | 566 | 3,341,485 | |||
Thallium | 4 | 18,378 | 5 | 18,768 | |||
Antimony | 1 | 10,872 | 18 | 132,546 | |||
Carbon tetrachloride | 2 | 8,739 | 2 | 8,739 | |||
1,2-Dichloroethane | 2 | 3,789 | 13 | 33,770 | |||
Benzene | 1 | 957 | 3 | 11,497 | |||
Di(2-ethylhexyl) phthalate | 1 | 196 | 77 | 894,792 | |||
Vinyl chloride | 1 | 171 | 1 | 171 |
Contaminants found in Louisiana above legal limits
Contaminant | # of Utilities | People Served | |
---|---|---|---|
Total trihalomethanes (TTHMs) | 77 | 117,357 | |
Arsenic | 11 | 33,191 | |
Haloacetic acids (HAA5) | 21 | 25,377 | |
Radium, combined (-226 & -228) | 1 | 5,250 |