Safest Drinking Water in Louisiana 2026
Louisiana has 5 public water systems serving 1,568,677 people. The safest system is E Jefferson Ww District 1 in Jefferson with a score of 100/100.
Top 5 Water Systems in Louisiana
| # | Water System | City | Pop. Served | Source | Violations | Score |
|---|---|---|---|---|---|---|
| 1 | E Jefferson Ww District 1 | Jefferson | 275,163 | Surface water | 0 | A (100) |
| 2 | Lafayette Utilities Water System | Lafayette | 169,389 | Ground water | 0 | A (100) |
| 3 | Baton Rouge Water Company | Baton Rouge | 596,844 | Ground water | 0 | A (97) |
| 4 | New Orleans Carrollton Water Works | New Orleans | 334,903 | Surface water | 2 | F (57) |
| 5 | Shreveport Water System | Shreveport | 192,378 | Surface water | 76 | F (10) |
Water quality data for Louisiana is sourced from the EPA Safe Drinking Water Information System (SDWIS), which tracks compliance for all public water systems.
Frequently Asked Questions
E Jefferson Ww District 1 in Jefferson has the highest Water Safety Score in Louisiana at 100/100 (Grade A), serving 275,163 people.
Louisiana has 5 public water systems serving 1,568,677 people. The average Water Safety Score is 73/100.
The Water Safety Score (0-100) is based on health violations (40%), contaminant exceedances (30%), enforcement history (20%), and monitoring violations (10%). Higher scores mean cleaner, safer water.
Water Safety Score: health violations (40%), contaminant exceedances (30%), enforcement history (20%), monitoring violations (10%).
The this entity category groups every U.S. public drinking-water safety entity sharing this attribute. The list above is the data; the paragraphs below explain what the grouping means against the broader the EPA Safe Drinking Water Information System (SDWIS) distribution and how to read the relative rankings within the category.
For readers using this category as a starting point, the per-entity detail pages linked from the table above carry the underlying the EPA Safe Drinking Water Information System (SDWIS) data in full. The category-level view is the filter; the per-entity pages are the actual answer.
Source: EPA Ground Water and Drinking Water, 2026.