2026 Rankings

Least Reliable Water Systems in Louisiana — 2026

Last updated: April 13, 2026

723 ZIP codes ranked by Reliability Score #1: ZIP 70462 (Springfield, LA) - 10/100
Lead Violations Lowest Score Safest Flood Risk Energy Cost Radon PFAS Reliability EJ Index Homebuyer Risk CO & Gas Safest Gas Remediation Burden Unresolved Violations (by Utility) Water Equity (by Utility)

Out of 723 ZIP codes with data in Louisiana, these are the lowest-ranked areas for reliability score. See also: National Least Reliable Water Systems in America | All Louisiana Rankings

Statistic Value
ZIP codes ranked 723
Lowest value 10/100
Median value 67/100
State Louisiana

100 Lowest-Ranked ZIP Codes

Rank ZIP Code City State Reliability Score Safety Score
1 70462 Springfield LA 10/100 61/100
2 71247 Hodge LA 10/100 82/100
3 71432 Georgetown LA 10/100 65/100
4 70037 Belle Chasse LA 15/100 50/100
5 70093 Belle Chasse LA 15/100 66/100
6 70538 Franklin LA 15/100 50/100
7 70630 Bell City LA 15/100 66/100
8 70631 Cameron LA 15/100 42/100
9 70632 Creole LA 15/100 55/100
10 70643 Grand Chenier LA 15/100 55/100
11 71016 Castor LA 15/100 46/100
12 71019 Coushatta LA 15/100 65/100
13 71037 Haughton LA 15/100 63/100
14 71046 Keatchie LA 15/100 66/100
15 71070 Saline LA 15/100 65/100
16 71220 Bastrop LA 15/100 67/100
17 71221 Bastrop LA 15/100 77/100
18 71222 Bernice LA 15/100 65/100
19 71223 Bonita LA 15/100 65/100
20 71229 Collinston LA 15/100 80/100
21 71234 Downsville LA 15/100 65/100
22 71235 Dubach LA 15/100 70/100
23 71238 Eros LA 15/100 70/100
24 71241 Farmerville LA 15/100 55/100
25 71260 Marion LA 15/100 65/100
26 71269 Rayville LA 15/100 55/100
27 71280 Sterlington LA 15/100 65/100
28 71326 Clayton LA 15/100 50/100
29 71334 Ferriday LA 15/100 55/100
30 71336 Gilbert LA 15/100 65/100
31 71340 Harrisonburg LA 15/100 60/100
32 71353 Melville LA 15/100 75/100
33 71357 Newellton LA 15/100 60/100
34 71406 Belmont LA 15/100 66/100
35 71410 Calvin LA 15/100 70/100
36 71414 Clarence LA 15/100 52/100
37 71419 Converse LA 15/100 70/100
38 71435 Grayson LA 15/100 70/100
39 71440 Joyce LA 15/100 66/100
40 71449 Many LA 15/100 65/100
41 71467 Pollock LA 15/100 60/100
42 71468 Provencal LA 15/100 70/100
43 71473 Sikes LA 15/100 66/100
44 71479 Tullos LA 15/100 66/100
45 71483 Winnfield LA 15/100 60/100
46 71486 Zwolle LA 15/100 70/100
47 70576 Pine Prairie LA 18/100 85/100
48 71023 Doyline LA 18/100 72/100
49 71282 Tallulah LA 18/100 47/100
50 71284 Tallulah LA 18/100 62/100
51 70772 Rosedale LA 20/100 80/100
52 71008 Bienville LA 20/100 70/100
53 71033 Greenwood LA 20/100 60/100
54 71101 Shreveport LA 20/100 65/100
55 71102 Shreveport LA 20/100 70/100
56 71103 Shreveport LA 20/100 65/100
57 71104 Shreveport LA 20/100 55/100
58 71105 Shreveport LA 20/100 55/100
59 71106 Shreveport LA 20/100 55/100
60 71107 Shreveport LA 20/100 60/100
61 71108 Shreveport LA 20/100 60/100
62 71109 Shreveport LA 20/100 60/100
63 71115 Shreveport LA 20/100 60/100
64 71118 Shreveport LA 20/100 55/100
65 71119 Shreveport LA 20/100 60/100
66 71120 Shreveport LA 20/100 70/100
67 71129 Shreveport LA 20/100 60/100
68 71130 Shreveport LA 20/100 66/100
69 71133 Shreveport LA 20/100 66/100
70 71134 Shreveport LA 20/100 70/100
71 71135 Shreveport LA 20/100 66/100
72 71136 Shreveport LA 20/100 70/100
73 71137 Shreveport LA 20/100 70/100
74 71138 Shreveport LA 20/100 70/100
75 71148 Shreveport LA 20/100 66/100
76 71149 Shreveport LA 20/100 70/100
77 71150 Shreveport LA 20/100 66/100
78 71151 Shreveport LA 20/100 66/100
79 71152 Shreveport LA 20/100 66/100
80 71153 Shreveport LA 20/100 66/100
81 71154 Shreveport LA 20/100 66/100
82 71156 Shreveport LA 20/100 66/100
83 71161 Shreveport LA 20/100 66/100
84 71162 Shreveport LA 20/100 70/100
85 71163 Shreveport LA 20/100 66/100
86 71164 Shreveport LA 20/100 66/100
87 71165 Shreveport LA 20/100 66/100
88 71166 Shreveport LA 20/100 66/100
89 70560 New Iberia LA 21/100 59/100
90 70562 New Iberia LA 21/100 74/100
91 70563 New Iberia LA 21/100 64/100
92 70788 White Castle LA 21/100 78/100
93 71021 Cullen LA 21/100 84/100
94 71039 Heflin LA 21/100 81/100
95 71245 Grambling LA 21/100 86/100
96 71268 Quitman LA 21/100 86/100
97 71454 Montgomery LA 21/100 86/100
98 70052 Gramercy LA 23/100 69/100
99 70392 Patterson LA 23/100 69/100
100 70523 Charenton LA 23/100 79/100

Methodology

Water system reliability scores (0-100) combine violation frequency, violation recency, resolution rate, and system size. Systems with repeated health-based violations and unresolved issues score lowest. The reliability score focuses specifically on the water utility performance, distinct from the broader Home Safety Score.

Data sources: EPA Safe Drinking Water Information System (SDWIS), FEMA National Flood Insurance Program, EPA radon zone maps, EIA electricity rates, and Consumer Confidence Reports. Last updated: 2026-04-13.

Frequently Asked Questions

What does a low water reliability score mean?

A low reliability score (below 50) indicates a water system with frequent violations, poor resolution rates, or recurring compliance issues. These systems may have aging infrastructure, inadequate treatment, or management challenges.

How is reliability different from safety score?

The reliability score focuses specifically on the water utility performance (violations, resolution, compliance). The Home Safety Score is broader, also including lead risk, radon, and flood data. A ZIP code can have a reliable water system but still have high radon or flood risk.

Explore More Rankings

How this ranking is calculated, data sources, and limitations: Rankings Methodology →

Related Rankings

Home Safety 2026 Water compliance, PFAS, radon, and annual AQI score inputs PFAS 2026 Forever chemicals detected in drinking water Lead Risk 2026 Lead pipe infrastructure and EPA exceedances
Disclaimer: Rankings are based on EPA, FEMA, and federal agency data. They reflect historical patterns and risk indicators, not necessarily current conditions. For the most current information, contact your local water utility or request a Consumer Confidence Report.

Get safety alerts for Louisiana

Free updates when EPA data changes for this area. No spam.

Unsubscribe anytime. Privacy Policy.

Share This Page

X Facebook
Check your water filter options Free tool - no phone call required.