2026 Rankings

Least Reliable Water Systems in Mississippi — 2026

Last updated: April 13, 2026

532 ZIP codes ranked by Reliability Score #1: ZIP 39073 (Florence, MS) - 15/100
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 532 ZIP codes with data in Mississippi, these are the lowest-ranked areas for reliability score. See also: National Least Reliable Water Systems in America | All Mississippi Rankings

Statistic Value
ZIP codes ranked 532
Lowest value 15/100
Median value 47/100
State Mississippi

100 Lowest-Ranked ZIP Codes

Rank ZIP Code City State Reliability Score Safety Score
1 39073 Florence MS 15/100 65/100
2 38740 Duncan MS 16/100 83/100
3 39201 Jackson MS 20/100 55/100
4 39202 Jackson MS 20/100 60/100
5 39203 Jackson MS 20/100 65/100
6 39204 Jackson MS 20/100 60/100
7 39205 Jackson MS 20/100 65/100
8 39206 Jackson MS 20/100 55/100
9 39207 Jackson MS 20/100 65/100
10 39209 Jackson MS 20/100 55/100
11 39210 Jackson MS 20/100 66/100
12 39211 Jackson MS 20/100 50/100
13 39212 Jackson MS 20/100 55/100
14 39213 Jackson MS 20/100 55/100
15 39215 Jackson MS 20/100 65/100
16 39216 Jackson MS 20/100 60/100
17 39217 Jackson MS 20/100 66/100
18 39225 Jackson MS 20/100 70/100
19 39235 Jackson MS 20/100 66/100
20 39236 Jackson MS 20/100 65/100
21 39250 Jackson MS 20/100 70/100
22 39269 Jackson MS 20/100 70/100
23 39271 Jackson MS 20/100 66/100
24 39282 Jackson MS 20/100 70/100
25 39283 Jackson MS 20/100 66/100
26 39284 Jackson MS 20/100 65/100
27 39286 Jackson MS 20/100 65/100
28 39289 Jackson MS 20/100 70/100
29 39296 Jackson MS 20/100 65/100
30 39298 Jackson MS 20/100 66/100
31 38916 Calhoun City MS 21/100 81/100
32 39041 Bolton MS 21/100 89/100
33 39175 Utica MS 24/100 88/100
34 38614 Clarksdale MS 25/100 68/100
35 38670 Sledge MS 25/100 69/100
36 38721 Anguilla MS 25/100 69/100
37 38963 Tutwiler MS 25/100 68/100
38 39153 Raleigh MS 25/100 75/100
39 39477 Sandersville MS 25/100 85/100
40 38606 Batesville MS 27/100 89/100
41 38658 Pope MS 27/100 98/100
42 38668 Senatobia MS 27/100 94/100
43 39208 Pearl MS 27/100 79/100
44 39288 Pearl MS 27/100 89/100
45 39327 Decatur MS 27/100 98/100
46 39429 Columbia MS 27/100 79/100
47 39474 Prentiss MS 27/100 94/100
48 39666 Summit MS 27/100 89/100
49 38760 Metcalfe MS 28/100 94/100
50 38736 Doddsville MS 29/100 93/100
51 38620 Courtland MS 30/100 83/100
52 38663 Ripley MS 30/100 83/100
53 38683 Walnut MS 30/100 89/100
54 38730 Boyle MS 30/100 80/100
55 38821 Amory MS 30/100 72/100
56 38824 Baldwyn MS 30/100 84/100
57 38851 Houston MS 30/100 71/100
58 38852 Iuka MS 30/100 80/100
59 38857 Mooreville MS 30/100 73/100
60 38860 Okolona MS 30/100 71/100
61 38868 Shannon MS 30/100 69/100
62 38878 Vardaman MS 30/100 53/100
63 38915 Bruce MS 30/100 80/100
64 38921 Charleston MS 30/100 76/100
65 39051 Carthage MS 30/100 79/100
66 39111 Magee MS 30/100 63/100
67 39192 West MS 30/100 85/100
68 39345 Newton MS 30/100 83/100
69 39350 Philadelphia MS 30/100 83/100
70 39354 Preston MS 30/100 89/100
71 39355 Quitman MS 30/100 80/100
72 39437 Ellisville MS 30/100 72/100
73 39440 Laurel MS 30/100 73/100
74 39441 Laurel MS 30/100 83/100
75 39442 Laurel MS 30/100 83/100
76 39443 Laurel MS 30/100 78/100
77 39452 Lucedale MS 30/100 71/100
78 39465 Petal MS 30/100 70/100
79 39466 Picayune MS 30/100 68/100
80 39638 Gloster MS 30/100 79/100
81 39654 Monticello MS 30/100 77/100
82 39669 Woodville MS 30/100 68/100
83 39759 Starkville MS 30/100 76/100
84 39760 Starkville MS 30/100 81/100
85 39773 West Point MS 30/100 62/100
86 38611 Byhalia MS 32/100 94/100
87 38732 Cleveland MS 32/100 84/100
88 38733 Cleveland MS 32/100 94/100
89 38753 Inverness MS 32/100 94/100
90 38858 Nettleton MS 32/100 94/100
91 39046 Canton MS 32/100 79/100
92 39059 Crystal Springs MS 32/100 89/100
93 39069 Fayette MS 32/100 89/100
94 39168 Taylorsville MS 32/100 94/100
95 39601 Brookhaven MS 32/100 84/100
96 39602 Brookhaven MS 32/100 94/100
97 39603 Brookhaven MS 32/100 98/100
98 38619 Como MS 34/100 97/100
99 38631 Friars Point MS 34/100 90/100
100 38651 Nesbit MS 34/100 88/100

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 →

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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.

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