Louisiana
980 Utilities
Serving: 4,964,000
Data available: 2012-2017
Contaminants Found: 88
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 2016 to March 2019 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 2016 to March 2019 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.
Contaminants found in Louisiana above health guidelines
Found above health guidelines | Found | ||||||
---|---|---|---|---|---|---|---|
Contaminant | # of Utilities | People Served | # of Utilities | People Served | |||
Haloacetic acids (HAA5) | 915 | 4,895,931 | 918 | 4,913,165 | |||
Total trihalomethanes (TTHMs) | 906 | 4,895,353 | 919 | 4,936,714 | |||
Chloroform | 828 | 4,739,291 | 899 | 4,909,235 | |||
Dichloroacetic acid | 799 | 4,708,712 | 864 | 4,835,168 | |||
Trichloroacetic acid | 742 | 4,601,865 | 760 | 4,628,219 | |||
Bromodichloromethane | 861 | 4,244,602 | 862 | 4,244,762 | |||
Dibromochloromethane | 831 | 4,136,516 | 842 | 4,237,088 | |||
Dibromoacetic acid | 758 | 3,947,923 | 767 | 4,058,558 | |||
Arsenic | 421 | 3,341,352 | 411 | 3,337,748 | |||
Radium, combined (-226 & -228) | 535 | 3,231,669 | 533 | 3,488,742 | |||
Chromium (hexavalent) | 99 | 2,406,824 | 117 | 3,261,420 | |||
Bromoform | 455 | 1,867,612 | 624 | 3,407,453 | |||
Nitrate and nitrite | 151 | 1,614,496 | 683 | 4,402,610 | |||
Uranium | 23 | 943,196 | 73 | 1,369,847 | |||
Chlorate | 28 | 930,575 | 76 | 2,130,706 | |||
Manganese | 192 | 926,232 | 831 | 3,852,889 | |||
Aluminum | 18 | 310,512 | 281 | 3,330,877 | |||
Nitrate | 5 | 221,316 | 10 | 229,719 | |||
Atrazine | 6 | 92,685 | 11 | 658,905 | |||
Carbon tetrachloride | 9 | 90,359 | 9 | 90,359 | |||
Cadmium | 16 | 53,418 | 16 | 53,418 | |||
Thallium | 6 | 36,594 | 6 | 36,594 | |||
Barium | 14 | 34,326 | 753 | 4,489,360 | |||
Benzo[a]pyrene | 10 | 31,678 | 16 | 762,028 | |||
Tetrachloroethylene (perchloroethylene) | 3 | 22,060 | 3 | 22,060 | |||
Di(2-ethylhexyl) phthalate | 4 | 15,925 | 204 | 2,274,134 | |||
1,2-Dichloroethane | 4 | 11,734 | 6 | 258,966 | |||
Antimony | 1 | 10,872 | 15 | 113,351 | |||
Glyphosate | 2 | 6,228 | 3 | 6,339 | |||
Chloromethane | 2 | 4,603 | 18 | 158,862 | |||
Hexachlorobenzene (HCB) | 3 | 4,139 | 3 | 4,139 | |||
1,2-Dibromo-3-chloropropane (DBCP) | 3 | 2,946 | 3 | 2,946 | |||
Beryllium | 1 | 1,294 | 17 | 86,295 | |||
Carbofuran | 1 | 306 | 5 | 533,655 | |||
Vinyl chloride | 1 | 160 | 1 | 160 |
Contaminants found in Louisiana above legal limits
Contaminant | # of Utilities | People Served | |
---|---|---|---|
Total trihalomethanes (TTHMs) | 78 | 109,053 | |
Arsenic | 10 | 42,912 | |
Radium, combined (-226 & -228) | 3 | 22,419 | |
Haloacetic acids (HAA5) | 17 | 19,886 |