State
Louisiana: drinking water records
EPA lists 815 community water systems serving homes in Louisiana. 257 took part in EPA's national PFAS survey (UCMR 5), and 47 found at least one PFAS above the level laboratories can measure.
In focus815community water systems
Public records. Clearer context.
0
ZIP reports published
815
community water systems
513
systems with a health-based violation since 2016
28
systems that reached the lead action level since 2016
Counties
- Acadia Parish 12 systems
- Allen Parish 10 systems
- Ascension Parish 17 systems
- Assumption Parish 1 systems
- Avoyelles Parish 17 systems
- Beauregard Parish 6 systems
- Bienville Parish 20 systems
- Bossier Parish 21 systems
- Caddo Parish 28 systems
- Calcasieu Parish 37 systems
- Caldwell Parish 11 systems
- Cameron Parish 7 systems
- Catahoula Parish 7 systems
- Claiborne Parish 11 systems
- Concordia Parish 7 systems
- De Soto Parish 9 systems
- East Baton Rouge Parish 4 systems
- East Carroll Parish 4 systems
- East Feliciana Parish 10 systems
- Evangeline Parish 13 systems
- Franklin Parish 7 systems
- Grant Parish 13 systems
- Iberia Parish 6 systems
- Iberville Parish 12 systems
- Jackson Parish 18 systems
- Jefferson Davis Parish 8 systems
- Jefferson Parish 4 systems
- LaSalle Parish 12 systems
- Lafayette Parish 35 systems
- Lafourche Parish 2 systems
- Lincoln Parish 20 systems
- Livingston Parish 23 systems
- Madison Parish 4 systems
- Morehouse Parish 15 systems
- Natchitoches Parish 13 systems
- Orleans Parish 2 systems
- Ouachita Parish 23 systems
- Plaquemines Parish 4 systems
- Pointe Coupee Parish 10 systems
- Rapides Parish 22 systems
- Red River Parish 11 systems
- Richland Parish 10 systems
- Sabine Parish 17 systems
- St. Bernard Parish 1 systems
- St. Charles Parish 1 systems
- St. Helena Parish 4 systems
- St. James Parish 4 systems
- St. John the Baptist Parish 4 systems
- St. Landry Parish 27 systems
- St. Martin Parish 14 systems
- St. Mary Parish 12 systems
- St. Tammany Parish 66 systems
- Tangipahoa Parish 21 systems
- Tensas Parish 5 systems
- Terrebonne Parish 2 systems
- Union Parish 18 systems
- Vermilion Parish 10 systems
- Vernon Parish 16 systems
- Washington Parish 12 systems
- Webster Parish 27 systems
- West Baton Rouge Parish 5 systems
- West Carroll Parish 7 systems
- West Feliciana Parish 3 systems
- Winn Parish 12 systems
ZIP reports
Sources
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.