Least Reliable Water Systems in Texas — 2026

Out of 2,728 ZIP codes with data in Texas, these are the lowest-ranked areas for reliability score. See also: National Least Reliable Water Systems in America | All Texas Rankings

Statistic	Value
ZIP codes ranked	2,728
Lowest value	10/100
Median value	65/100
State	Texas

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Reliability Score	Safety Score
1	76937	Eola	TX	10/100	55/100
2	78369	Mirando City	TX	10/100	70/100
3	78828	Barksdale	TX	10/100	66/100
4	79227	Crowell	TX	10/100	66/100
5	79255	Quitaque	TX	10/100	55/100
6	79261	Turkey	TX	10/100	55/100
7	79367	Smyer	TX	10/100	39/100
8	79377	Welch	TX	10/100	66/100
9	79380	Whitharral	TX	10/100	39/100
10	79505	Benjamin	TX	10/100	55/100
11	79713	Ackerly	TX	10/100	72/100
12	79738	Gail	TX	10/100	55/100
13	79785	Toyah	TX	10/100	57/100
14	77413	Barker	TX	13/100	90/100
15	79021	Cotton Center	TX	13/100	54/100
16	75440	Emory	TX	15/100	33/100
17	75479	Savoy	TX	15/100	55/100
18	75750	Arp	TX	15/100	55/100
19	75792	Winona	TX	15/100	66/100
20	75865	Woodlake	TX	15/100	66/100
21	75973	Shelbyville	TX	15/100	66/100
22	75975	Timpson	TX	15/100	70/100
23	75976	Wells	TX	15/100	55/100
24	76043	Glen Rose	TX	15/100	65/100
25	76384	Vernon	TX	15/100	64/100
26	76385	Vernon	TX	15/100	58/100
27	76454	Gorman	TX	15/100	62/100
28	76528	Gatesville	TX	15/100	65/100
29	76596	Gatesville	TX	15/100	66/100
30	76597	Gatesville	TX	15/100	66/100
31	76598	Gatesville	TX	15/100	66/100
32	76599	Gatesville	TX	15/100	66/100
33	76624	Axtell	TX	15/100	62/100
34	76654	Leroy	TX	15/100	55/100
35	76661	Marlin	TX	15/100	70/100
36	76678	Prairie Hill	TX	15/100	55/100
37	76682	Riesel	TX	15/100	62/100
38	76825	Brady	TX	15/100	66/100
39	76862	Millersview	TX	15/100	66/100
40	77404	Bay City	TX	15/100	76/100
41	77410	Cypress	TX	15/100	66/100
42	77414	Bay City	TX	15/100	61/100
43	77429	Cypress	TX	15/100	50/100
44	77457	Matagorda	TX	15/100	55/100
45	77977	Placedo	TX	15/100	55/100
46	77979	Port Lavaca	TX	15/100	55/100
47	77982	Port O Connor	TX	15/100	60/100
48	78341	Benavides	TX	15/100	70/100
49	78357	Freer	TX	15/100	62/100
50	78361	Hebbronville	TX	15/100	65/100
51	78393	Woodsboro	TX	15/100	65/100
52	78580	Raymondville	TX	15/100	66/100
53	78606	Blanco	TX	15/100	67/100
54	78624	Fredericksburg	TX	15/100	65/100
55	78656	Maxwell	TX	15/100	70/100
56	79043	Hart	TX	15/100	46/100
57	79225	Chillicothe	TX	15/100	55/100
58	79257	Silverton	TX	15/100	66/100
59	79329	Idalou	TX	15/100	58/100
60	79336	Levelland	TX	15/100	53/100
61	79338	Levelland	TX	15/100	50/100
62	79345	Meadow	TX	15/100	70/100
63	79355	Plains	TX	15/100	70/100
64	79358	Ropesville	TX	15/100	50/100
65	79359	Seagraves	TX	15/100	70/100
66	79363	Shallowater	TX	15/100	58/100
67	79373	Tahoka	TX	15/100	70/100
68	79383	New Home	TX	15/100	44/100
69	79502	Aspermont	TX	15/100	70/100
70	79749	Lenorah	TX	15/100	66/100
71	79821	Anthony	TX	15/100	78/100
72	79843	Marfa	TX	15/100	50/100
73	79846	Redford	TX	15/100	39/100
74	75759	Cuney	TX	16/100	81/100
75	78118	Karnes City	TX	18/100	79/100
76	76945	Robert Lee	TX	20/100	66/100
77	79087	Texline	TX	20/100	17/100
78	79239	Lakeview	TX	20/100	66/100
79	79378	Wellman	TX	20/100	58/100
80	79381	Wilson	TX	20/100	53/100
81	75974	Tenaha	TX	21/100	70/100
82	77656	Silsbee	TX	21/100	68/100
83	78155	Seguin	TX	21/100	72/100
84	78156	Seguin	TX	21/100	92/100
85	78593	Santa Rosa	TX	21/100	73/100
86	79045	Hereford	TX	21/100	74/100
87	76267	Slidell	TX	22/100	94/100
88	77442	Garwood	TX	22/100	83/100
89	79001	Adrian	TX	22/100	78/100
90	79052	Kress	TX	22/100	67/100
91	79733	Forsan	TX	22/100	83/100
92	79854	Valentine	TX	22/100	67/100
93	75630	Avinger	TX	23/100	80/100
94	79032	Edmonson	TX	23/100	63/100
95	79527	Ira	TX	23/100	90/100
96	76234	Decatur	TX	24/100	88/100
97	76245	Gordonville	TX	24/100	77/100
98	78014	Cotulla	TX	24/100	82/100
99	78370	Odem	TX	24/100	80/100
100	79346	Morton	TX	24/100	93/100

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: 2026-06-04.

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.