Free tap water grades for 1,100+ water systems & 10,000+ ZIP codesFree tap water grades for 10,000+ ZIP codes Official EPA compliance records · Independent ratings

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 C.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
C
71/100
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
C 66,798
BOSSIER CITY
C 78,960
Baton Rouge
C 656,772
DENHAM SPRINGS
B 73,506
HOUMA
C 116,460
JEFFERSON
C 415,427
LAFAYETTE
C 169,389
LAKE CHARLES
B 79,500
LOCKPORT
C 81,609
MONROE
F 57,000
NATALBANY
B 72,504
New Orleans
F 334,903
SHREVEPORT
F 192,378

Grade distribution

A
1 (6%)
B
9 (53%)
C
3 (18%)
D
2 (12%)
F
2 (12%)

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 88 A
#2 TANGIPAHOA PARISH WATER DISTRICT NATALBANY 72,504 83 B
#3 CITY OF LAKE CHARLES WATER SYSTEM LAKE CHARLES 79,500 80 B
#4 WARD II WATER DISTRICT DENHAM SPRINGS 73,506 80 B
#5 CITY OF BOSSIER CITY WATER SYSTEM BOSSIER CITY 78,960 77 B
#6 LAFOURCHE WATER DISTRICT 1 LOCKPORT 81,609 77 B
#7 LAFAYETTE UTILITIES WATER SYSTEM LAFAYETTE 169,389 76 B
#8 CITY OF ALEXANDRIA WATER SYSTEM ALEXANDRIA 66,798 76 B
#9 SCHRIEVER WATER TREATMENT SERVICE AREA HOUMA 116,460 75 B
#10 Baton Rouge Municipal Water System Baton Rouge 220,000 75 B
#11 E JEFFERSON WW DISTRICT 1 JEFFERSON 275,163 70 C
#12 W JEFFERSON WW DISTRICT 2 JEFFERSON 140,264 69 C
#13 NEW IBERIA WATER SYSTEM (LAWCO) BATON ROUGE 59,928 65 C
#14 New Orleans Department of Public Works New Orleans 391,000 60 D
#15 NEW ORLEANS CARROLLTON WATER WORKS NEW ORLEANS 334,903 57 D
#16 MONROE WATER SYSTEM MONROE 57,000 52 F
#17 SHREVEPORT WATER SYSTEM SHREVEPORT 192,378 45 F