Louisiana Tap Water Quality Report

335 cities analyzed • 3,683,520 people served

Updated March 2026 • Data from EWG & EPA SDWIS

335

Cities Analyzed

10.2

Avg Above Guidelines

3,683,520

Total Population Served

Best Water Quality

Kentwood (1 above guidelines)

Most Concerns

Rayville (15 above guidelines)

Most Common Contaminants in Louisiana

Contaminant	Found In	% of Cities
Haloacetic acids (HAA5) carcinogen	331 of 335	99%
Total trihalomethanes (TTHMs) carcinogen	329 of 335	98%
Dichloroacetic acid carcinogen	327 of 335	98%
Chloroform carcinogen	325 of 335	97%
Bromodichloromethane carcinogen	322 of 335	96%
Dibromochloromethane carcinogen	317 of 335	95%
Dibromoacetic acid	316 of 335	94%
Trichloroacetic acid carcinogen	313 of 335	93%
Fluoride	279 of 335	83%
Radium, combined (-226 and -228)	274 of 335	82%

City-by-City Water Quality Rankings

Ranked by number of contaminants above EWG health guidelines (most to fewest).

#	City	Detected	Above Guidelines	Above Legal	People Served
1	New Orleans	34	15	0	291,044
2	Napoleonville	31	15	0	21,366
3	Abbeville	23	15	0	14,445
4	Rayville	20	15	0	4,842
5	Lafayette	22	14	0	156,516
6	Houma	29	14	0	105,852
7	Lockport	26	14	0	81,609
8	Monroe	26	14	0	57,000
9	Luling	29	14	0	52,879
10	Belle Chasse	33	14	0	19,644
11	Youngsville	22	14	0	17,319
12	Barksdale AFB	24	14	0	13,000
13	Morgan City	29	14	0	12,703
14	Milton	23	14	0	11,430
15	Donaldsonville	30	14	0	9,732
16	Scott	23	14	0	9,216
17	Westwego	32	14	0	8,534
18	Start	17	14	0	2,514
19	Ridgecrest	20	14	2	855
20	Jefferson	33	13	0	275,163
21	Alexandria	29	13	0	66,798
22	Natchitoches	26	13	0	29,334
23	Longville	26	13	0	23,100
24	Gretna	31	13	0	17,802
25	Thibodaux	33	13	0	15,810
26	Broussard	24	13	0	14,370
27	Duson	22	13	0	13,587
28	Benton	29	13	0	10,890
29	Convent	30	13	0	9,392
30	Stonewall	18	13	0	7,608
31	Winnsboro	17	13	0	7,518
32	Monterey	16	13	1	5,250
33	White Castle	22	13	1	2,550
34	Oil City	23	13	0	2,163
35	Grand Coteau	16	13	0	1,650
36	Clayton	18	13	1	723
37	Clarence	26	13	0	642
38	Crowville	22	13	0	0
39	Cameron	24	13	0	0
40	Shreveport	23	12	0	201,000
41	Lake Charles	28	12	0	85,000
42	Bossier City	23	12	0	76,685
43	Chalmette	29	12	0	44,000
44	Sulphur	20	12	0	20,632
45	Pineville	29	12	0	20,315
46	Opelousas	21	12	0	19,764
47	West Monroe	28	12	0	16,005
48	Blanchard	22	12	0	15,882
49	Plaquemine	30	12	0	14,043
50	Bogalusa	23	12	0	14,000
51	Carencro	20	12	0	10,485
52	Tallulah	22	12	0	8,601
53	Breaux Bridge	19	12	1	8,547
54	Franklin	24	12	0	8,500
55	Mansfield	21	12	0	7,653
56	Centerville	21	12	0	7,500
57	Ferriday	19	12	0	6,921
58	Welsh	17	12	0	5,709
59	Choudrant	20	12	0	3,300
60	Columbia	14	12	0	3,048
61	Haynesville	17	12	0	2,859
62	Iota	16	12	0	1,860
63	Olla	19	12	0	1,660
64	Mooringsport	22	12	0	999
65	Mangham	15	12	0	927
66	Hosston	17	12	0	729
67	Fenton	16	12	0	379
68	Bossier	24	12	1	96
69	Logansport	22	12	0	0
70	Waterproof	22	12	0	0
71	Erath	15	12	0	0
72	Denham Springs	27	11	0	73,506
73	Maurice	22	11	0	23,490
74	Ruston	23	11	0	22,468
75	Tioga	27	11	0	19,983
76	Covington	20	11	0	17,536
77	Minden	24	11	0	16,281
78	Baker	22	11	0	13,855
79	Port Allen	18	11	0	13,437
80	Parks	19	11	0	12,801
81	Deville	20	11	0	12,078
82	Cecilia	24	11	1	11,949
83	Jeanerette	23	11	0	9,709
84	New Iberia	16	11	0	8,448
85	Natchez	15	11	0	8,400
86	Kinder	21	11	0	8,106
87	Leesville	14	11	0	7,923
88	Zwolle	24	11	0	6,738
89	Many	23	11	0	6,717
90	Slagle	16	11	0	6,282
91	Lawtell	17	11	0	5,961
92	Boyce	14	11	0	5,814
93	Farmerville	20	11	1	5,400
94	Haughton	23	11	0	5,355
95	Greenwood	20	11	0	5,205
96	Turkey Creek	16	11	0	5,169
97	Lutcher	22	11	0	4,781
98	Mamou	23	11	0	4,559
99	Kaplan	16	11	0	4,522
100	Basile	14	11	0	4,500
101	Archibald	14	11	0	4,200
102	Jennings	16	11	0	4,161
103	Vinto	17	11	0	4,101
104	Iowa	16	11	0	3,575
105	Plaucheville	16	11	0	3,420
106	Atlanta	17	11	0	3,324
107	Coushatta	18	11	0	3,300
108	Hessmer	18	11	0	3,246
109	Elmer	14	11	0	3,135
110	Oak Grove	15	11	0	3,102
111	Downsville	16	11	0	2,406
112	Calhoun	15	11	0	2,082
113	Washington	15	11	0	1,713
114	Marion	18	11	1	1,635
115	Grayson	16	11	0	1,461
116	Cullen	17	11	0	1,440
117	St Joseph	17	11	0	1,332
118	Converse	19	11	1	1,305
119	Wisner	14	11	0	1,221
120	Simpson	13	11	0	1,116
121	Lake Providence	17	11	0	1,104
122	Sterlington	14	11	1	1,095
123	Hineston	14	11	0	1,089
124	Morse	14	11	0	806
125	Saline	16	11	1	783
126	Wilson	17	11	0	780
127	Jones	16	11	1	696
128	Oak Ridge	15	11	0	345
129	Elburn	15	11	0	222
130	St. Amant	13	11	0	96
131	Lake Arthur	14	11	0	0
132	Angola	17	11	0	0
133	Bonita	14	11	0	0
134	Belmont	21	11	1	0
135	Creole	18	11	1	0
136	Dequincy	17	11	0	0
137	Elizabeth	14	11	0	0
138	Keatchie	24	11	0	0
139	Zachary	23	10	0	25,503
140	Gonzales	17	10	0	16,806
141	Fort Polk	16	10	0	10,902
142	Loreauville	18	10	0	9,933
143	Leonville	17	10	0	9,552
144	Church Point	15	10	0	9,147
145	Livingston	14	10	0	8,658
146	Springhill	16	10	0	7,800
147	Rayne	16	10	0	7,722
148	Marksville	16	10	0	7,593
149	St. Martinville	13	10	0	7,575
150	Albany	18	10	0	7,305
151	Eunice	15	10	0	7,284
152	Singer	14	10	0	6,613
153	Ville Platte	16	10	0	6,590
154	Vidalia	19	10	0	6,354
155	Keithville	17	10	0	5,724
156	Woodworth	16	10	0	4,818
157	Sunset	17	10	0	4,761
158	Arnaudville	13	10	1	4,350
159	Anacoco	16	10	0	4,182
160	Delhi	15	10	0	4,071
161	Vivian	19	10	0	4,050
162	Bordelonville	16	10	0	3,900
163	Port Barre	15	10	0	3,867
164	Bell City	16	10	0	3,759
165	Pollock	15	10	0	3,474
166	Cottonport	16	10	0	3,120
167	Bernice	14	10	0	3,054
168	Amelia	21	10	0	2,823
169	Egan	18	10	0	2,817
170	Mansura	16	10	0	2,619
171	Cankton	14	10	0	2,598
172	Glenmora	15	10	0	2,472
173	Innis	15	10	0	2,400
174	Pioneer	13	10	0	2,265
175	Dry Prong	10	10	0	2,250
176	Evergreen	15	10	0	2,205
177	Simmesport	14	10	0	2,142
178	Palmetto	17	10	0	2,136
179	Georgetown	16	10	1	1,872
180	Campti	19	10	0	1,800
181	Independance	13	10	0	1,782
182	Moureauville	16	10	0	1,725
183	Quitman	16	10	0	1,710
184	Cheneyville	17	10	0	1,531
185	Dubach	14	10	1	1,530
186	Sarepta	14	10	0	1,500
187	Shongaloo	13	10	0	1,485
188	Colfax	16	10	0	1,344
189	Summerfield	14	10	0	1,329
190	Doyline	13	10	0	1,275
191	Pelican	14	10	0	1,200
192	Sicily Island	12	10	0	1,173
193	Newellton	19	10	0	1,100
194	Mer Rouge	18	10	0	1,098
195	Transylvania	17	10	0	1,071
196	Clarks	15	10	0	996
197	Merryville	14	10	0	993
198	Pleasant Hill	22	10	0	990
199	Hackberry	15	10	0	926
200	Madisonville	24	10	0	894
201	Estherwood	17	10	0	855
202	Joyce	18	10	1	840
203	Arcadia	13	10	0	825
204	Tullos	16	10	2	792
205	Urania	14	10	0	784
206	Mermentau	14	10	0	771
207	Hall Summit	15	10	0	756
208	Ringgold	11	10	0	744
209	Grand Cane	14	10	0	675
210	Calvin	16	10	1	591
211	Dubberly	14	10	0	495
212	Ida	16	10	0	489
213	Brooklyn	18	10	0	444
214	Lisbon	14	10	0	441
215	Rodessa	11	10	0	414
216	Delta	16	10	0	369
217	Plain Dealing	14	10	0	294
218	Frierson	14	10	0	96
219	Moreauville	15	10	0	0
220	Epps	19	10	0	0
221	Johnson Bayou	14	10	0	0
222	Cotton Valley	13	10	0	0
223	Grand Chenier	17	10	1	0
224	Baton Rouge	27	9	0	579,714
225	Bastrop	20	9	0	18,105
226	Ethel	14	9	0	14,829
227	Des Peres	16	9	0	10,155
228	New Roads	14	9	0	9,024
229	Winnfield	16	9	0	8,469
230	Patterson	22	9	0	8,456
231	Ponchatoula	16	9	0	6,657
232	Oakdale	14	9	0	6,297
233	Jonesboro	19	9	0	6,132
234	Grambling	14	9	0	6,000
235	Bently	14	9	0	5,289
236	Bunkie	12	9	0	4,393
237	Angie	13	9	0	4,200
238	Athens	14	9	0	3,843
239	Effie	13	9	0	3,726
240	Kilbourne	14	9	0	3,618
241	Gilbert	13	9	0	3,429
242	Homer	12	9	0	3,427
243	Pearl River	14	9	0	3,333
244	Maringouin	14	9	0	3,300
245	Trout	13	9	0	3,189
246	Starks	13	9	0	3,150
247	Oberlin	14	9	0	3,042
248	Jackson	14	9	0	2,736
249	Pine Prairie	13	9	0	2,598
250	Delcambre	14	9	0	2,457
251	Krotz Springs	11	9	0	2,130
252	Gueydan	12	9	0	1,980
253	Sibley	14	9	0	1,950
254	Slaughter	14	9	0	1,920
255	Hornbeck	12	9	0	1,743
256	Simsboro	13	9	0	1,635
257	Forest	14	9	0	1,560
258	Amite	12	9	0	1,400
259	Montgomery	14	9	0	1,317
260	Kelly	12	9	0	1,140
261	Echo	10	9	0	1,044
262	Vinton	13	9	0	942
263	985-542-5239	12	9	0	764
264	Florien	16	9	0	700
265	St. Landry	11	9	0	678
266	Robert	16	9	0	635
267	Carville	15	9	0	600
268	Junction City	13	9	0	489
269	Eros	16	9	0	345
270	Bienville	11	9	0	315
271	Sringfield	14	9	0	300
272	Montpelier	14	9	0	290
273	Norwood	10	9	0	279
274	Lillie	13	9	0	249
275	Gibsland	14	9	0	225
276	St. Benedict	9	9	0	127
277	Lakeland	14	9	0	111
278	Grant	12	9	0	0
279	Gramercy	20	9	0	0
280	Fordoche	13	9	0	0
281	Elton	19	9	0	0
282	Morganza	15	9	0	0
283	Abita Springs	14	9	0	0
284	Hammond	20	8	0	59,529
285	Slidell	18	8	0	35,544
286	Laplace	14	8	0	31,965
287	Walker	21	8	0	15,813
288	Westlake	13	8	0	5,340
289	Rosepine	15	8	0	4,083
290	Lena	15	8	0	3,540
291	Jonesville	9	8	0	3,141
292	Independence	14	8	0	3,052
293	Folsom	12	8	0	1,845
294	Morrow	13	8	0	1,650
295	Melville	12	8	0	1,590
296	Heflin	12	8	0	1,350
297	Greensburg	12	8	0	1,340
298	Livonia	10	8	0	1,234
299	Provencal	13	8	2	1,032
300	Springfield	9	8	0	999
301	Chatham	11	8	0	780
302	Tangipahoa	10	8	0	748
303	Dodson	14	8	0	714
304	Rosedale	12	8	0	664
305	Sikes	14	8	2	639
306	Lacombe	13	8	0	630
307	Noble	14	8	0	549
308	Goldonna	12	8	0	540
309	Hodge	11	8	0	479
310	Fisher	12	8	0	348
311	Austin	12	8	0	192
312	Sanford	11	8	0	87
313	Saint Amant	11	8	0	25
314	Grosse Tete	13	8	0	0
315	Pitkin	12	8	0	0
316	Clinton	14	8	0	0
317	Deridder	12	7	0	14,400
318	New Llano	14	7	0	4,824
319	Harrisonburg	12	7	0	2,256
320	Castor	12	7	0	435
321	Irving	12	7	0	162
322	Franklinton	11	6	0	4,150
323	Collinston	12	6	0	780
324	Ventress	9	6	0	160
325	Maurepas	10	6	0	132
326	Jena	7	5	0	3,614
327	Prairieville	10	5	0	1,548
328	Mandeville	13	4	0	13,000
329	Forest Hill	8	4	0	3,399
330	Sun	5	4	0	726
331	Pinehurst	12	4	0	420
332	St Amant	8	4	0	69
333	St. Francisville	8	3	0	10,956
334	Berwick	11	3	0	0
335	Kentwood	3	1	0	2,205

Recommended Filtration for Louisiana

Based on the most common contaminants found across Louisiana (Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Dichloroacetic acid), we recommend a reverse osmosis system or high-quality carbon block filter to remove disinfection byproducts and their precursors.

Echo RO System

Removes up to 99.9% of contaminants. The gold standard for drinking water in Louisiana homes.

View RO Systems

Echo Whole-Home Filter

Protect every tap in your home from chlorine, VOCs, and disinfection byproducts.

View Whole-Home Filters

Echo Hydrogen Water Flask

Once your water is clean, supercharge it with molecular hydrogen for antioxidant and anti-inflammatory benefits.

Shop Hydrogen Flask

Frequently Asked Questions

Is Louisiana tap water safe to drink?

Water quality varies significantly across Louisiana. Of the 335 cities analyzed, the average city has 10.2 contaminants above EWG health guidelines. The best water quality was found in Kentwood. We recommend checking your specific city's report for detailed information.

What city has the best water in Louisiana?

Based on our analysis, Kentwood has the fewest contaminants above EWG health guidelines in Louisiana, with 1 above guideline levels.

What city has the worst water in Louisiana?

Based on our analysis, Rayville has the most contaminants above EWG health guidelines in Louisiana, with 15 above guideline levels.

What's the best water filter for Louisiana residents?

For most Louisiana households, we recommend a reverse osmosis (RO) system for drinking water and a whole-home filter for showers and baths. The specific recommendation depends on your city's contaminant profile — check your city's report for personalized guidance.

National Water Quality Reports

Data sources: Environmental Working Group (EWG) Tap Water Database, U.S. EPA Safe Drinking Water Information System (SDWIS)

Last updated: March 2026

Methodology: Contaminant levels are compared against both EPA legal limits (Maximum Contaminant Levels) and EWG health guidelines, which are often stricter and based on the latest scientific research.

Louisiana Water Quality Report (2026)