Louisiana
Water quality data from the EPA Safe Drinking Water Information System
Water Systems
5,089
Active public water systems
Population Served
5.25M
Residents with piped water
Lead Violations
40
Systems exceeding 15 ppb
Copper Violations
200
Lead & Copper Rule
Average Lead Level
EPA Action Level: 15 ppb
MCLG (health goal): 0 ppb
Average across 1421 systems with reported lead data.
Violations Detected
240 water systems in Louisiana have reported violations under the Lead and Copper Rule. These utilities are required to notify customers and take corrective action.
Water Systems: Highest Lead Levels
| System Name | City | Population | Lead Level | Status | Sample Date |
|---|---|---|---|---|---|
| NEW ORLEANS | 52,785 | 6.00 ppb | OK | 2022-12-31 | |
| NEW ORLEANS | 334,903 | 5.00 ppb | OK | 2022-12-31 | |
| BELLE CHASSE | 10,308 | 5.00 ppb | OK | 2023-12-31 | |
| HAMMOND | 72,504 | 4.00 ppb | OK | 2022-12-31 | |
| BASTROP | 18,105 | 4.00 ppb | OK | 2024-12-31 | |
| JEFFERSON | 140,264 | 3.00 ppb | OK | 2022-12-31 | |
| BATON ROUGE | 17,733 | 3.00 ppb | OK | 2023-12-31 | |
| WEST MONROE | 14,649 | 3.00 ppb | OK | 2023-12-31 | |
| ABBEVILLE | 14,445 | 3.00 ppb | OK | 2023-12-31 | |
| CECILIA | 12,249 | 3.00 ppb | OK | 2023-12-31 | |
| WEST MONROE | 10,725 | 3.00 ppb | OK | 2025-12-31 | |
| LOREAUVILLE | 10,137 | 3.00 ppb | OK | 2025-12-31 | |
| MAURICE | 24,132 | 2.30 ppb | OK | 2025-12-31 | |
| JEFFERSON | 275,163 | 2.00 ppb | OK | 2022-12-31 | |
| LULING | 52,879 | 2.00 ppb | OK | 2023-12-31 |
Showing top 15 of 1409 systems with lead data. Action level: 15 ppb.
Systems With Active Violations
These water systems have exceeded EPA limits and must take corrective action.
LONGVILLE · Pop. 24,000
Lead: 2.00 ppb (2023-12-31)
BASTROP · Pop. 18,105
Lead: 4.00 ppb (2024-12-31)
DERIDDER · Pop. 14,400
Lead: 2.00 ppb (2025-12-31)
CECILIA · Pop. 12,249
Lead: 3.00 ppb (2023-12-31)
Water Source Types
Air Quality
GoodAvg AQI
48.5
PM2.5
8.8 µg/m³
Unhealthy Days
13
Primary Pollutant
PM2.5, Ozone
Source: EPA AirNow & American Lung Association 2024 State of the Air. AQI scale: 0–50 Good · 51–100 Moderate · 101–150 Sensitive Groups · 151+ Unhealthy.
PFAS Contamination
Moderate DetectionPFAS (per- and polyfluoroalkyl substances), known as “forever chemicals,” are a group of synthetic chemicals that persist indefinitely in the environment and human body. The EPA set a maximum contaminant level (MCL) of 4 parts per trillion (ppt) for PFOA and PFOS in April 2024. View national PFAS tracker →
Systems Tested
198
PFAS Detected
78
Detection Rate
39.4%
Exceeding MCL (4 ppt)
16(8.1%)
Highest recorded level: 58 ppt (EPA MCL: 4 ppt). Listed among states with worst contamination; heavy industrial chemical corridor