Louisiana County Water Quality Reports

Acadia County, LA: 21 Health Violations — 68/100 (2026)

2026 report: Acadia County, LA scores 68/100 (Grade C). 12 ZIP codes analyzed. 53 EPA violations found. Free report with contaminant data and filter picks.

Allen County, LA: 12 Health Violations — 75/100 (2026)

2026 report: Allen County, LA scores 75/100 (Grade B). 10 ZIP codes analyzed. 21 EPA violations found. Free report with contaminant data and filter picks.

Ascension County, LA: 2 Health Violations — 63/100 (2026)

2026 report: Ascension County, LA scores 63/100 (Grade C). 11 ZIP codes analyzed. 10 EPA violations found. Free report with contaminant data and filter ...

Assumption County, LA: 3 Health Violations — 62/100 (2026)

2026 report: Assumption County, LA scores 62/100 (Grade C). 6 ZIP codes analyzed. 4 EPA violations found. Free report with contaminant data and filter p...

Avoyelles County, LA: 21 Health Violations — 78/100 (2026)

2026 report: Avoyelles County, LA scores 78/100 (Grade B). 13 ZIP codes analyzed. 36 EPA violations found. Free report with contaminant data and filter ...

Beauregard County, LA: 2 Health Violations — 82/100 (2026)

2026 report: Beauregard County, LA scores 82/100 (Grade B). 6 ZIP codes analyzed. 8 EPA violations found. Free report with contaminant data and filter p...

Bienville County, LA: 64 Health Violations — 62/100 (2026)

2026 report: Bienville County, LA scores 62/100 (Grade C). 8 ZIP codes analyzed. 112 EPA violations found. Free report with contaminant data and filter ...

Bossier County, LA: 465 Health Violations — 68/100 (2026)

2026 report: Bossier County, LA scores 68/100 (Grade C). 25 ZIP codes analyzed. 697 EPA violations found. Free report with contaminant data and filter p...

Caddo County, LA: 538 Health Violations — 68/100 (2026)

2026 report: Caddo County, LA scores 68/100 (Grade C). 32 ZIP codes analyzed. 708 EPA violations found. Free report with contaminant data and filter picks.

Calcasieu County, LA: 13 Health Violations — 84/100 (2026)

2026 report: Calcasieu County, LA scores 84/100 (Grade B). 19 ZIP codes analyzed. 25 EPA violations found. Free report with contaminant data and filter ...

Caldwell County, LA: 29 Health Violations — 78/100 (2026)

2026 report: Caldwell County, LA scores 78/100 (Grade B). 6 ZIP codes analyzed. 38 EPA violations found. Free report with contaminant data and filter pi...

Cameron County, LA: 42 Health Violations — 64/100 (2026)

2026 report: Cameron County, LA scores 64/100 (Grade C). 6 ZIP codes analyzed. 44 EPA violations found. Free report with contaminant data and filter picks.

Catahoula County, LA: Lead Above EPA Limits — 60/100 (2026)

2026 report: Catahoula County, LA scores 60/100 (Grade C). 7 ZIP codes analyzed. 70 EPA violations found. Lead above EPA limits. Free report with contam...

Claiborne County, LA: 10 Health Violations — 91/100 (2026)

2026 report: Claiborne County, LA scores 91/100 (Grade A). 5 ZIP codes analyzed. 21 EPA violations found. Free report with contaminant data and filter p...

Concordia County, LA: 45 Health Violations — 74/100 (2026)

2026 report: Concordia County, LA scores 74/100 (Grade B). 5 ZIP codes analyzed. 84 EPA violations found. Free report with contaminant data and filter p...

De Soto County, LA: 47 Health Violations — 73/100 (2026)

2026 report: De Soto County, LA scores 73/100 (Grade B). 8 ZIP codes analyzed. 71 EPA violations found. Free report with contaminant data and filter picks.

East Baton Rouge County, LA: 2 Health Violations — 88/100

2026 report: East Baton Rouge County, LA scores 88/100 (Grade A). 46 ZIP codes analyzed. 8 EPA violations found. Free report with contaminant data and f...

East Carroll County, LA: 15 Health Violations — 68/100

2026 report: East Carroll County, LA scores 68/100 (Grade C). 3 ZIP codes analyzed. 30 EPA violations found. Free report with contaminant data and filte...

East Feliciana County, LA: 3 Health Violations — 85/100

2026 report: East Feliciana County, LA scores 85/100 (Grade A). 6 ZIP codes analyzed. 10 EPA violations found. Free report with contaminant data and fil...

Evangeline County, LA: 17 Health Violations — 74/100 (2026)

2026 report: Evangeline County, LA scores 74/100 (Grade B). 7 ZIP codes analyzed. 36 EPA violations found. Free report with contaminant data and filter ...

Franklin County, LA: 27 Health Violations — 71/100 (2026)

2026 report: Franklin County, LA scores 71/100 (Grade B). 8 ZIP codes analyzed. 48 EPA violations found. Free report with contaminant data and filter pi...

Grant County, LA: 34 Health Violations — 68/100 (2026)

2026 report: Grant County, LA scores 68/100 (Grade C). 8 ZIP codes analyzed. 48 EPA violations found. Free report with contaminant data and filter picks.

Iberia County, LA: 15 Health Violations — 70/100 (2026)

2026 report: Iberia County, LA scores 70/100 (Grade B). 8 ZIP codes analyzed. 54 EPA violations found. Free report with contaminant data and filter picks.

Iberville County, LA: Lead Above EPA Limits — 59/100 (2026)

2026 report: Iberville County, LA scores 59/100 (Grade C). 15 ZIP codes analyzed. 46 EPA violations found. Lead above EPA limits. Free report with conta...

Jackson County, LA: 28 Health Violations — 83/100 (2026)

2026 report: Jackson County, LA scores 83/100 (Grade B). 5 ZIP codes analyzed. 69 EPA violations found. Free report with contaminant data and filter picks.

Jefferson County, LA: 61 Health Violations — 72/100 (2026)

2026 report: Jefferson County, LA scores 72/100 (Grade B). 13 ZIP codes analyzed. 125 EPA violations found. Free report with contaminant data and filter...

Jefferson Davis County, LA: Lead Above EPA Limits — 74/100

2026 report: Jefferson Davis County, LA scores 74/100 (Grade B). 7 ZIP codes analyzed. 5 EPA violations found. Lead above EPA limits. Free report with c...

La Salle County, LA: High Radon Risk — 60/100 (2026)

2026 report: La Salle County, LA scores 60/100 (Grade C). 1 ZIP code analyzed. No EPA violations. Free report with contaminant data and filter picks.

Lafayette County, LA: 5 Health Violations — 61/100 (2026)

2026 report: Lafayette County, LA scores 61/100 (Grade C). 49 ZIP codes analyzed. 25 EPA violations found. Free report with contaminant data and filter ...

Lafourche County, LA Water Safety: 57/100 (2026)

2026 report: Lafourche County, LA scores 57/100 (Grade C). 11 ZIP codes analyzed. No EPA violations. Free report with contaminant data and filter picks.

LaSalle County, LA: 2 Health Violations — 80/100 (2026)

2026 report: LaSalle County, LA scores 80/100 (Grade B). 3 ZIP codes analyzed. 2 EPA violations found. Free report with contaminant data and filter picks.

Lincoln County, LA: 51 Health Violations — 84/100 (2026)

2026 report: Lincoln County, LA scores 84/100 (Grade B). 8 ZIP codes analyzed. 77 EPA violations found. Free report with contaminant data and filter picks.

Livingston County, LA: 8 Health Violations — 70/100 (2026)

2026 report: Livingston County, LA scores 70/100 (Grade B). 9 ZIP codes analyzed. 34 EPA violations found. Free report with contaminant data and filter ...

Madison County, LA: 8 Health Violations — 68/100 (2026)

2026 report: Madison County, LA scores 68/100 (Grade C). 3 ZIP codes analyzed. 20 EPA violations found. Free report with contaminant data and filter picks.

Morehouse County, LA: 68 Health Violations — 75/100 (2026)

2026 report: Morehouse County, LA scores 75/100 (Grade B). 8 ZIP codes analyzed. 122 EPA violations found. Free report with contaminant data and filter ...

Natchitoches County, LA: 26 Health Violations — 69/100

2026 report: Natchitoches County, LA scores 69/100 (Grade C). 10 ZIP codes analyzed. 35 EPA violations found. Free report with contaminant data and filt...

Orleans County, LA: 460 Health Violations — 77/100 (2026)

2026 report: Orleans County, LA scores 77/100 (Grade B). 58 ZIP codes analyzed. 1039 EPA violations found. Free report with contaminant data and filter ...

Ouachita County, LA: 105 Health Violations — 67/100 (2026)

2026 report: Ouachita County, LA scores 67/100 (Grade C). 15 ZIP codes analyzed. 127 EPA violations found. Free report with contaminant data and filter ...

Plaquemines County, LA: 38 Health Violations — 56/100 (2026)

2026 report: Plaquemines County, LA scores 56/100 (Grade C). 5 ZIP codes analyzed. 52 EPA violations found. Free report with contaminant data and filter...

Pointe Coupee County, LA: 5 Health Violations — 66/100

2026 report: Pointe Coupee County, LA scores 66/100 (Grade C). 18 ZIP codes analyzed. 12 EPA violations found. Free report with contaminant data and fil...

Rapides County, LA: 155 Health Violations — 69/100 (2026)

2026 report: Rapides County, LA scores 69/100 (Grade C). 30 ZIP codes analyzed. 275 EPA violations found. Free report with contaminant data and filter p...

Red River County, LA: 24 Health Violations — 82/100 (2026)

2026 report: Red River County, LA scores 82/100 (Grade B). 2 ZIP codes analyzed. 48 EPA violations found. Free report with contaminant data and filter p...

Richland County, LA: 13 Health Violations — 76/100 (2026)

2026 report: Richland County, LA scores 76/100 (Grade B). 5 ZIP codes analyzed. 29 EPA violations found. Free report with contaminant data and filter pi...

Sabine County, LA: 127 Health Violations — 70/100 (2026)

2026 report: Sabine County, LA scores 70/100 (Grade B). 11 ZIP codes analyzed. 177 EPA violations found. Free report with contaminant data and filter pi...

St. Bernard County, LA Water Safety: 60/100 (2026)

2026 report: St. Bernard County, LA scores 60/100 (Grade C). 4 ZIP codes analyzed. No EPA violations. Free report with contaminant data and filter picks.

St. Charles County, LA: 1 Violation — 47/100 (2026)

2026 report: St. Charles County, LA scores 47/100 (Grade D). 10 ZIP codes analyzed. 1 EPA violation found. Free report with contaminant data and filter ...

St. Helena County, LA: 3 Health Violations — 83/100 (2026)

2026 report: St. Helena County, LA scores 83/100 (Grade B). 2 ZIP codes analyzed. 10 EPA violations found. Free report with contaminant data and filter ...

St. James County, LA: 7 Health Violations — 56/100 (2026)

2026 report: St. James County, LA scores 56/100 (Grade C). 14 ZIP codes analyzed. 9 EPA violations found. Free report with contaminant data and filter p...

St. Landry County, LA: 35 Health Violations — 80/100 (2026)

2026 report: St. Landry County, LA scores 80/100 (Grade B). 15 ZIP codes analyzed. 85 EPA violations found. Free report with contaminant data and filter...

St. Martin County, LA: 4 Health Violations — 69/100 (2026)

2026 report: St. Martin County, LA scores 69/100 (Grade C). 3 ZIP codes analyzed. 9 EPA violations found. Free report with contaminant data and filter p...

St. Mary County, LA: 48 Health Violations — 67/100 (2026)

2026 report: St. Mary County, LA scores 67/100 (Grade C). 12 ZIP codes analyzed. 74 EPA violations found. Free report with contaminant data and filter p...

St. Tammany County, LA: 9 Health Violations — 72/100 (2026)

2026 report: St. Tammany County, LA scores 72/100 (Grade B). 21 ZIP codes analyzed. 38 EPA violations found. Free report with contaminant data and filte...

Tangipahoa County, LA: 17 Health Violations — 75/100 (2026)

2026 report: Tangipahoa County, LA scores 75/100 (Grade B). 14 ZIP codes analyzed. 57 EPA violations found. Free report with contaminant data and filter...

Tensas County, LA: 67 Health Violations — 63/100 (2026)

2026 report: Tensas County, LA scores 63/100 (Grade C). 4 ZIP codes analyzed. 136 EPA violations found. Free report with contaminant data and filter picks.

Terrebonne County, LA: 4 Violations — 55/100 (2026)

2026 report: Terrebonne County, LA scores 55/100 (Grade C). 11 ZIP codes analyzed. 4 EPA violations found. Free report with contaminant data and filter ...

Union County, LA: 172 Health Violations — 66/100 (2026)

2026 report: Union County, LA scores 66/100 (Grade C). 8 ZIP codes analyzed. 204 EPA violations found. Free report with contaminant data and filter picks.

Vermilion County, LA: 14 Health Violations — 72/100 (2026)

2026 report: Vermilion County, LA scores 72/100 (Grade B). 8 ZIP codes analyzed. 26 EPA violations found. Free report with contaminant data and filter p...

Vernon County, LA: 9 Health Violations — 83/100 (2026)

2026 report: Vernon County, LA scores 83/100 (Grade B). 13 ZIP codes analyzed. 20 EPA violations found. Free report with contaminant data and filter picks.

Washington County, LA: 7 Health Violations — 78/100 (2026)

2026 report: Washington County, LA scores 78/100 (Grade B). 6 ZIP codes analyzed. 13 EPA violations found. Free report with contaminant data and filter ...

Webster County, LA: 21 Health Violations — 88/100 (2026)

2026 report: Webster County, LA scores 88/100 (Grade A). 11 ZIP codes analyzed. 63 EPA violations found. Free report with contaminant data and filter pi...

West Baton Rouge County, LA: 1 Health Violation — 84/100

2026 report: West Baton Rouge County, LA scores 84/100 (Grade B). 1 ZIP code analyzed. 4 EPA violations found. Free report with contaminant data and fil...

West Carroll County, LA: 8 Health Violations — 90/100 (2026)

2026 report: West Carroll County, LA scores 90/100 (Grade A). 5 ZIP codes analyzed. 14 EPA violations found. Free report with contaminant data and filte...

West Feliciana County, LA: 1 Violation — 62/100 (2026)

2026 report: West Feliciana County, LA scores 62/100 (Grade C). 3 ZIP codes analyzed. 1 EPA violation found. Free report with contaminant data and filte...

Winn County, LA: 119 Health Violations — 72/100 (2026)

2026 report: Winn County, LA scores 72/100 (Grade B). 7 ZIP codes analyzed. 154 EPA violations found. Free report with contaminant data and filter picks.