Louisiana tap water quality
898 community water systems serving 5.2 million people.
Data: U.S. EPA · How we read the data · How we check it
PFAS: EPA's 2023–2025 testing. Lead: results from the last five years. 6 more systems have no recent lead results in EPA's database.
Water systems with PFAS above the federal limit
Based on EPA's UCMR 5 results (2023–2025) compared to the April 2024 limits, the way EPA compares them. Systems have until 2029 to comply. Largest first.
Louisiana PFAS report: chart, rankings and data to download →
Largest water systems in Louisiana
- Baton Rouge Water Company596,844 people · Groundwater · LouisianaLithium above screening level
- New Orleans Carrollton Water Works334,903 people · Surface water · LouisianaPFOA detectedAlso: PFOS detected · HFPO-DA detected · 1 health-based violation since 2016
- East Jefferson Water Works District 1275,163 people · Surface water · LouisianaNo PFAS above limits
- City of Shreveport Water System192,378 people · Surface water · LouisianaTotal trihalomethanes (TTHM) violations
- Lafayette Utilities Water System169,389 people · Groundwater · LouisianaLithium above screening level
- W Jefferson Water Works District 2140,264 people · Surface water · LouisianaHaloacetic acids (HAA5) violation
- Schriever Water Treatment Service Area116,460 people · Surface water · LouisianaNo PFAS above limits
- Lafourche Water District 181,609 people · Surface water · LouisianaNo PFAS above limits
- City of Bossier City Water System79,506 people · Surface water · LouisianaNo PFAS above limits
- City of Lake Charles Water System79,500 people · Groundwater · LouisianaLithium above screening level
- Ward II Water District78,147 people · Groundwater · LouisianaLithium above screening level
- Tangipahoa Parish Water District75,873 people · Groundwater · LouisianaLithium above screening levelAlso: 5 health-based violations since 2016
- City of Alexandria Water System66,798 people · Groundwater · LouisianaColiform bacteria violationAlso: Lithium above screening level
- Lawco – New Iberia Water System59,928 people · Groundwater · LouisianaNo PFAS above limits
- City of Monroe Water System57,000 people · Surface water · LouisianaHaloacetic acids (HAA5) violations
Louisiana cities and towns
- Alexandria
- Baton Rouge
- Bossier City
- Central
- Kenner
- Lafayette
- Lake Charles
- Monroe
- New Orleans
- Shreveport
- Slidell
Most health-based violations since 2016
- Vixen Water System750 people · Groundwater · LouisianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations · Coliform bacteria violation
- Fairview Union Water System2,346 people · Surface water · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- Village of Tullos Water System792 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- Alberta Water System1,860 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations · Coliform bacteria violation
- Town of Ferriday Water System3,816 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations · Lead near 2027 level · Lithium above screening level
- Pendleton Water Association2,634 people · Surface water · LouisianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
- Village of Sikes Water System639 people · Groundwater · LouisianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
- Bellwood Water System1,032 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- West Winn Water System, Inc1,965 people · Groundwater · LouisianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
- Ebarb Wwks District #1 – North Ebarb1,761 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- Town of Newellton Water System1,100 people · Surface water · LouisianaHaloacetic acids (HAA5) violations
- Pleasant Hills-Crossroads Water Systems840 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- Litroe Water System369 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- Village of Calvin Water System591 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations · Coliform bacteria violation
- Jones McGinty Water System660 people · Groundwater · LouisianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
All Louisiana utilities on this site
Every Louisiana system serving 50,000+ people or with PFAS above a federal limit, A to Z. Download all 898 systems as CSV.
- Baton Rouge Water Company
- City of Alexandria Water System
- City of Bossier City Water System
- City of Lake Charles Water System
- City of Monroe Water System
- City of Shreveport Water System
- East Jefferson Water Works District 1
- Lafayette Utilities Water System
- Lafourche Water District 1
- Lawco – New Iberia Water System
- New Orleans Algiers Water Works
- New Orleans Carrollton Water Works
- Schriever Water Treatment Service Area
- St Charles Parish Dept of Waterworks
- Tangipahoa Parish Water District
- Town of Vidalia Water System
- W Jefferson Water Works District 2
- Ward II Water District
Questions
Does Louisiana tap water have PFAS?
EPA tested 263 community water systems in Louisiana for 29 PFAS between 2023 and 2025. 9 had at least one regulated PFAS detected, and 1 had an entry-point average above a 2024 federal limit. Those 1 systems serve about 6,354 people. Systems have until 2029 to meet the limits.
How many Louisiana water systems have violations?
561 systems in Louisiana had at least one health-based violation since 2016 (6,102 violations in total). 1,261 violations are currently listed as unaddressed.
Which Louisiana water systems are over the lead action level?
4 systems had a lead 90th percentile above the 15 ppb action level in their most recent results from the last five years. Another 6 systems have no lead results in EPA's database from the last five years. Lead depends on each home's pipes, so a test of your own tap is the only way to know your level.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.