Least Reliable Water Systems in Alabama — 2026

Out of 819 ZIP codes with data in Alabama, these are the lowest-ranked areas for reliability score. See also: National Least Reliable Water Systems in America | All Alabama Rankings

Statistic	Value
ZIP codes ranked	819
Lowest value	15/100
Median value	78/100
State	Alabama

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Reliability Score	Safety Score
1	35981	Ider	AL	15/100	56/100
2	36908	Gilbertown	AL	15/100	70/100
3	35768	Scottsboro	AL	25/100	45/100
4	35769	Scottsboro	AL	25/100	50/100
5	36323	Elba	AL	25/100	69/100
6	36436	Dickinson	AL	25/100	73/100
7	35563	Guin	AL	28/100	67/100
8	35570	Hamilton	AL	28/100	70/100
9	35160	Talladega	AL	32/100	64/100
10	35161	Talladega	AL	32/100	65/100
11	35987	Steele	AL	32/100	78/100
12	36601	Mobile	AL	37/100	81/100
13	36602	Mobile	AL	37/100	81/100
14	36603	Mobile	AL	37/100	76/100
15	36604	Mobile	AL	37/100	81/100
16	36605	Mobile	AL	37/100	71/100
17	36606	Mobile	AL	37/100	76/100
18	36607	Mobile	AL	37/100	76/100
19	36608	Mobile	AL	37/100	76/100
20	36609	Mobile	AL	37/100	76/100
21	36610	Mobile	AL	37/100	76/100
22	36611	Mobile	AL	37/100	76/100
23	36612	Mobile	AL	37/100	86/100
24	36615	Mobile	AL	37/100	91/100
25	36616	Mobile	AL	37/100	86/100
26	36617	Mobile	AL	37/100	76/100
27	36618	Mobile	AL	37/100	81/100
28	36619	Mobile	AL	37/100	76/100
29	36625	Mobile	AL	37/100	94/100
30	36628	Mobile	AL	37/100	94/100
31	36630	Mobile	AL	37/100	94/100
32	36633	Mobile	AL	37/100	81/100
33	36640	Mobile	AL	37/100	94/100
34	36641	Mobile	AL	37/100	94/100
35	36644	Mobile	AL	37/100	94/100
36	36652	Mobile	AL	37/100	86/100
37	36660	Mobile	AL	37/100	86/100
38	36663	Mobile	AL	37/100	94/100
39	36670	Mobile	AL	37/100	91/100
40	36671	Mobile	AL	37/100	94/100
41	36675	Mobile	AL	37/100	94/100
42	36685	Mobile	AL	37/100	94/100
43	36688	Mobile	AL	37/100	94/100
44	36689	Mobile	AL	37/100	91/100
45	36691	Mobile	AL	37/100	91/100
46	36693	Mobile	AL	37/100	76/100
47	36695	Mobile	AL	37/100	81/100
48	35660	Sheffield	AL	39/100	57/100
49	35115	Montevallo	AL	40/100	79/100
50	35552	Detroit	AL	40/100	79/100
51	36401	Evergreen	AL	40/100	89/100
52	36522	Citronelle	AL	40/100	88/100
53	36782	Sweet Water	AL	40/100	87/100
54	36912	Lisman	AL	40/100	88/100
55	36010	Brundidge	AL	42/100	91/100
56	36203	Oxford	AL	42/100	61/100
57	35646	Leighton	AL	44/100	65/100
58	36446	Fulton	AL	44/100	86/100
59	35546	Berry	AL	45/100	79/100
60	35990	Walnut Grove	AL	45/100	79/100
61	36028	Dozier	AL	45/100	87/100
62	36458	Mexia	AL	45/100	95/100
63	35573	Kansas	AL	47/100	78/100
64	36726	Camden	AL	49/100	88/100
65	36784	Thomasville	AL	49/100	83/100
66	35031	Blountsville	AL	50/100	81/100
67	35074	Green Pond	AL	50/100	81/100
68	35130	Quinton	AL	50/100	76/100
69	35135	Riverside	AL	50/100	81/100
70	35146	Springville	AL	50/100	81/100
71	35630	Florence	AL	50/100	63/100
72	35631	Florence	AL	50/100	64/100
73	35632	Florence	AL	50/100	64/100
74	35633	Florence	AL	50/100	68/100
75	35634	Florence	AL	50/100	58/100
76	35671	Tanner	AL	50/100	60/100
77	36003	Autaugaville	AL	50/100	76/100
78	36034	Glenwood	AL	50/100	92/100
79	36048	Louisville	AL	50/100	73/100
80	36344	Hartford	AL	50/100	83/100
81	36426	Brewton	AL	50/100	72/100
82	36427	Brewton	AL	50/100	87/100
83	36432	Castleberry	AL	50/100	96/100
84	36580	Summerdale	AL	50/100	72/100
85	36701	Selma	AL	50/100	64/100
86	36702	Selma	AL	50/100	74/100
87	36703	Selma	AL	50/100	64/100
88	35072	Goodwater	AL	52/100	61/100
89	35772	Stevenson	AL	52/100	61/100
90	36022	Deatsville	AL	52/100	79/100
91	36033	Georgiana	AL	52/100	94/100
92	36320	Cottonwood	AL	52/100	91/100
93	35964	Douglas	AL	53/100	79/100
94	35020	Bessemer	AL	54/100	66/100
95	35021	Bessemer	AL	54/100	81/100
96	35022	Bessemer	AL	54/100	76/100
97	35023	Bessemer	AL	54/100	71/100
98	36904	Butler	AL	54/100	88/100
99	35014	Alpine	AL	55/100	63/100
100	35133	Remlap	AL	55/100	66/100

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.