Least Reliable Water Systems in Texas — 2026

Out of 2,649 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	2,649
Lowest value	10/100
Median value	72/100
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	79255	Quitaque	TX	10/100	55/100
4	79261	Turkey	TX	10/100	55/100
5	79358	Ropesville	TX	10/100	50/100
6	79367	Smyer	TX	10/100	39/100
7	79377	Welch	TX	10/100	66/100
8	79380	Whitharral	TX	10/100	39/100
9	79505	Benjamin	TX	10/100	55/100
10	79713	Ackerly	TX	10/100	72/100
11	79738	Gail	TX	10/100	55/100
12	79749	Lenorah	TX	10/100	66/100
13	79846	Redford	TX	10/100	39/100
14	79021	Cotton Center	TX	13/100	54/100
15	75440	Emory	TX	15/100	33/100
16	75479	Savoy	TX	15/100	55/100
17	75750	Arp	TX	15/100	55/100
18	75792	Winona	TX	15/100	66/100
19	75973	Shelbyville	TX	15/100	66/100
20	75975	Timpson	TX	15/100	70/100
21	75976	Wells	TX	15/100	55/100
22	76043	Glen Rose	TX	15/100	65/100
23	76384	Vernon	TX	15/100	64/100
24	76454	Gorman	TX	15/100	62/100
25	76528	Gatesville	TX	15/100	65/100
26	76596	Gatesville	TX	15/100	66/100
27	76597	Gatesville	TX	15/100	66/100
28	76598	Gatesville	TX	15/100	66/100
29	76599	Gatesville	TX	15/100	66/100
30	76624	Axtell	TX	15/100	62/100
31	76654	Leroy	TX	15/100	55/100
32	76661	Marlin	TX	15/100	70/100
33	76678	Prairie Hill	TX	15/100	55/100
34	76682	Riesel	TX	15/100	62/100
35	76825	Brady	TX	15/100	66/100
36	76862	Millersview	TX	15/100	66/100
37	77414	Bay City	TX	15/100	61/100
38	77429	Cypress	TX	15/100	50/100
39	77433	Cypress	TX	15/100	55/100
40	77457	Matagorda	TX	15/100	55/100
41	77977	Placedo	TX	15/100	55/100
42	77979	Port Lavaca	TX	15/100	55/100
43	77982	Port O Connor	TX	15/100	60/100
44	78332	Alice	TX	15/100	60/100
45	78341	Benavides	TX	15/100	70/100
46	78357	Freer	TX	15/100	62/100
47	78361	Hebbronville	TX	15/100	65/100
48	78393	Woodsboro	TX	15/100	65/100
49	78580	Raymondville	TX	15/100	66/100
50	78606	Blanco	TX	15/100	67/100
51	78624	Fredericksburg	TX	15/100	65/100
52	78656	Maxwell	TX	15/100	70/100
53	79043	Hart	TX	15/100	46/100
54	79225	Chillicothe	TX	15/100	55/100
55	79227	Crowell	TX	15/100	66/100
56	79257	Silverton	TX	15/100	66/100
57	79329	Idalou	TX	15/100	58/100
58	79336	Levelland	TX	15/100	53/100
59	79345	Meadow	TX	15/100	70/100
60	79355	Plains	TX	15/100	70/100
61	79359	Seagraves	TX	15/100	70/100
62	79363	Shallowater	TX	15/100	58/100
63	79373	Tahoka	TX	15/100	70/100
64	79502	Aspermont	TX	15/100	70/100
65	79821	Anthony	TX	15/100	78/100
66	79843	Marfa	TX	15/100	50/100
67	75759	Cuney	TX	16/100	81/100
68	78010	Center Point	TX	16/100	81/100
69	78118	Karnes City	TX	18/100	79/100
70	76357	Byers	TX	20/100	68/100
71	76852	Lohn	TX	20/100	67/100
72	78344	Bruni	TX	20/100	55/100
73	78623	Fischer	TX	20/100	74/100
74	79087	Texline	TX	20/100	17/100
75	79239	Lakeview	TX	20/100	66/100
76	79378	Wellman	TX	20/100	58/100
77	79381	Wilson	TX	20/100	53/100
78	79533	Lueders	TX	20/100	55/100
79	75974	Tenaha	TX	21/100	70/100
80	77656	Silsbee	TX	21/100	68/100
81	78155	Seguin	TX	21/100	72/100
82	78593	Santa Rosa	TX	21/100	73/100
83	79045	Hereford	TX	21/100	74/100
84	75560	Douglassville	TX	22/100	83/100
85	76267	Slidell	TX	22/100	94/100
86	79001	Adrian	TX	22/100	78/100
87	79052	Kress	TX	22/100	67/100
88	79733	Forsan	TX	22/100	83/100
89	79854	Valentine	TX	22/100	67/100

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.