Lead pipes by county in Louisiana
Lead, galvanized and unknown service lines reported by the water systems serving each Louisiana county.
| County | Lead | Galv. | Unknown | Systems |
|---|
| Acadia Parish | 0 | 163 | 8,751 | 10 |
| Allen Parish | 0 | 3 | 3,059 | 10 |
| Ascension Parish | 0 | 0 | 478 | 4 |
| Assumption Parish | 0 | 0 | 0 | 1 |
| Avoyelles Parish | 0 | 0 | 1,829 | 15 |
| Beauregard Parish | 0 | 0 | 316 | 5 |
| Bienville Parish | 0 | 0 | 883 | 8 |
| Bossier Parish | 0 | 55 | 20,539 | 12 |
| Caddo Parish | 1,799 | 2 | 89,051 | 14 |
| Calcasieu Parish | 0 | 50 | 6,533 | 22 |
| Caldwell Parish | 0 | 0 | 324 | 9 |
| Cameron Parish | 0 | 0 | 0 | 4 |
| Catahoula Parish | 0 | 0 | 0 | 5 |
| Claiborne Parish | 0 | 0 | 1,624 | 6 |
| Concordia Parish | 0 | 0 | 5 | 6 |
| De Soto Parish | 0 | 391 | 410 | 8 |
| East Baton Rouge Parish | 0 | 1,007 | 34,147 | 3 |
| East Carroll Parish | 0 | 0 | 0 | 3 |
| East Feliciana Parish | 0 | 0 | 0 | 6 |
| Evangeline Parish | 0 | 0 | 8,645 | 10 |
| Franklin Parish | 0 | 0 | 3,869 | 6 |
| Grant Parish | 0 | 0 | 472 | 10 |
| Iberia Parish | 0 | 144 | 7,662 | 4 |
| Iberville Parish | 0 | 0 | 14,930 | 9 |
| Jackson Parish | 0 | 0 | 2,394 | 6 |
| Jefferson Davis Parish | 0 | 0 | 5,760 | 7 |
| Jefferson Parish | 0 | 0 | 163,807 | 4 |
| La Salle Parish | 0 | 0 | 0 | 6 |
| Lafayette Parish | 0 | 0 | 2,782 | 36 |
| Lafourche Parish | 0 | 0 | 0 | 2 |
| Lincoln Parish | 0 | 22 | 1,893 | 13 |
| Livingston Parish | 0 | 16 | 5,557 | 15 |
| Madison Parish | 0 | 0 | 2,266 | 3 |
| Morehouse Parish | 0 | 0 | 151 | 8 |
| Natchitoches Parish | 0 | 464 | 6,504 | 6 |
| Orleans Parish | 14,832 | 49 | 121,909 | 2 |
| Ouachita Parish | 0 | 9 | 18,993 | 19 |
| Plaquemines Parish | 0 | 0 | 7,447 | 4 |
| Pointe Coupee Parish | 0 | 0 | 6,913 | 9 |
| Rapides Parish | 0 | 31 | 17,864 | 19 |
| Red River Parish | 0 | 0 | 1,494 | 4 |
| Richland Parish | 0 | 0 | 1,880 | 7 |
| Sabine Parish | 0 | 0 | 2,282 | 13 |
| St. Bernard Parish | 0 | 0 | 16,942 | 1 |
| St. Charles Parish | 0 | 0 | 0 | 1 |
| St. Helena Parish | 0 | 4 | 335 | 3 |
| St. James Parish | 0 | 0 | 0 | 4 |
| St. John The Baptist Parish | 0 | 0 | 0 | 3 |
| St. Landry Parish | 0 | 238 | 7,503 | 21 |
| St. Martin Parish | 0 | 0 | 7,820 | 11 |
| St. Mary Parish | 2 | 2 | 6,372 | 9 |
| St. Tammany Parish | 0 | 0 | 9,211 | 44 |
| Tangipahoa Parish | 0 | 0 | 10,906 | 14 |
| Tensas Parish | 0 | 14 | 1,199 | 5 |
| Terrebonne Parish | 0 | 0 | 35,755 | 2 |
| Union Parish | 0 | 0 | 1,520 | 14 |
| Vermilion Parish | 6 | 43 | 9,197 | 10 |
| Vernon Parish | 0 | 2 | 81 | 13 |
| Washington Parish | 0 | 0 | 458 | 7 |
| Webster Parish | 1 | 34 | 0 | 16 |
| West Baton Rouge Parish | 0 | 0 | 0 | 4 |
| West Carroll Parish | 0 | 10 | 0 | 6 |
| West Feliciana Parish | 0 | 0 | 0 | 3 |
| Winn Parish | 0 | 0 | 1 | 4 |
Systems serving several counties are counted in each. Source: EPA SDWIS service line inventory, 2026 Q3.