Louisiana Water Quality Ratings

TapWaterSafety has rated 17 public water systems in Louisiana, serving a combined 3,006,206 residents. The statewide average grade is D.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
D
65/100
Total utilities rated 17
Population served 3,006,206
Most recent test 2024
🇪🇺 Would fail EU standards 10 of 17

Top water quality concerns in Louisiana

  • Haloacetic acids (HAA9) significantly above health guideline
  • Total trihalomethanes (TTHMs) significantly above health guideline
  • Haloacetic acids (HAA5) significantly above health guideline
  • Arsenic detected
  • Arsenic significantly above health guideline

Cities in Louisiana

Browse tap water quality reports by city. Click any city to see its grade, what's in the water, and recommended filters.

ALEXANDRIA
D 66,798
BATON ROUGE
C 656,772
BOSSIER CITY
D 78,960
Baton Rouge
D 220,000
DENHAM SPRINGS
D 73,506
HOUMA
D 116,460
JEFFERSON
D 415,427
LAFAYETTE
D 169,389
LAKE CHARLES
D 79,500
LOCKPORT
D 81,609
MONROE
D 57,000
NATALBANY
C 72,504
NEW ORLEANS
F 334,903
New Orleans
F 391,000
SHREVEPORT
D 192,378

Grade distribution

A
0 (0%)
B
2 (12%)
C
9 (53%)
D
5 (29%)
F
1 (6%)

All rated utilities in Louisiana

Sorted by score, highest first. Click any utility to see the full grade card.

Rank Utility City Population Score Grade
#1 BATON ROUGE WATER COMPANY BATON ROUGE 596,844 79 B
#2 TANGIPAHOA PARISH WATER DISTRICT NATALBANY 72,504 77 B
#3 CITY OF LAKE CHARLES WATER SYSTEM LAKE CHARLES 79,500 68 C
#4 LAFAYETTE UTILITIES WATER SYSTEM LAFAYETTE 169,389 68 C
#5 WARD II WATER DISTRICT DENHAM SPRINGS 73,506 68 C
#6 CITY OF ALEXANDRIA WATER SYSTEM ALEXANDRIA 66,798 68 C
#7 CITY OF BOSSIER CITY WATER SYSTEM BOSSIER CITY 78,960 67 C
#8 LAFOURCHE WATER DISTRICT 1 LOCKPORT 81,609 67 C
#9 SCHRIEVER WATER TREATMENT SERVICE AREA HOUMA 116,460 67 C
#10 W JEFFERSON WW DISTRICT 2 JEFFERSON 140,264 65 C
#11 MONROE WATER SYSTEM MONROE 57,000 65 C
#12 NEW IBERIA WATER SYSTEM (LAWCO) BATON ROUGE 59,928 64 D
#13 SHREVEPORT WATER SYSTEM SHREVEPORT 192,378 63 D
#14 E JEFFERSON WW DISTRICT 1 JEFFERSON 275,163 63 D
#15 Baton Rouge Municipal Water System Baton Rouge 220,000 63 D
#16 NEW ORLEANS CARROLLTON WATER WORKS NEW ORLEANS 334,903 55 D
#17 New Orleans Department of Public Works New Orleans 391,000 46 F