Least Reliable Water Systems in Arkansas — 2026

Out of 711 ZIP codes with data in Arkansas, these are the lowest-ranked areas for reliability score. See also: National Least Reliable Water Systems in America | All Arkansas Rankings

Statistic	Value
ZIP codes ranked	711
Lowest value	15/100
Median value	75/100
State	Arkansas

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Reliability Score	Safety Score
1	71662	Pickens	AR	15/100	33/100
2	71825	Blevins	AR	15/100	62/100
3	71922	Antoine	AR	15/100	55/100
4	71957	Mount Ida	AR	15/100	50/100
5	72181	Wooster	AR	15/100	75/100
6	72833	Danville	AR	15/100	62/100
7	72853	Ola	AR	15/100	67/100
8	72824	Belleville	AR	21/100	77/100
9	71770	Waldo	AR	25/100	55/100
10	71837	Fouke	AR	25/100	67/100
11	71940	Delight	AR	25/100	55/100
12	72029	Clarendon	AR	25/100	57/100
13	72327	Crawfordsville	AR	25/100	81/100
14	72360	Marianna	AR	25/100	65/100
15	72368	Moro	AR	25/100	57/100
16	72554	Mammoth Spring	AR	25/100	45/100
17	72801	Russellville	AR	25/100	65/100
18	72802	Russellville	AR	25/100	65/100
19	72811	Russellville	AR	25/100	70/100
20	72812	Russellville	AR	25/100	66/100
21	71630	Arkansas City	AR	28/100	71/100
22	71765	Strong	AR	30/100	72/100
23	72928	Branch	AR	30/100	66/100
24	71852	Nashville	AR	31/100	78/100
25	72944	Mansfield	AR	33/100	71/100
26	71653	Lake Village	AR	35/100	52/100
27	71801	Hope	AR	35/100	78/100
28	71802	Hope	AR	35/100	78/100
29	71858	Rosston	AR	35/100	62/100
30	72624	Compton	AR	35/100	55/100
31	72644	Lead Hill	AR	35/100	55/100
32	72672	Pyatt	AR	35/100	66/100
33	72761	Siloam Springs	AR	35/100	48/100
34	72936	Greenwood	AR	35/100	71/100
35	72937	Hackett	AR	35/100	49/100
36	71961	Oden	AR	36/100	46/100
37	71966	Oden	AR	36/100	35/100
38	71826	Bradley	AR	38/100	74/100
39	72007	Austin	AR	40/100	93/100
40	72036	Cotton Plant	AR	40/100	73/100
41	72073	Humphrey	AR	40/100	71/100
42	72342	Helena	AR	40/100	55/100
43	72628	Deer	AR	40/100	80/100
44	71960	Norman	AR	41/100	63/100
45	72176	Ward	AR	41/100	83/100
46	72851	New Blaine	AR	41/100	73/100
47	72384	Turrell	AR	42/100	87/100
48	71701	Camden	AR	45/100	74/100
49	71711	Camden	AR	45/100	85/100
50	72439	Walnut Ridge	AR	45/100	95/100
51	72476	Walnut Ridge	AR	45/100	86/100
52	71937	Cove	AR	46/100	78/100
53	72753	Prairie Grove	AR	46/100	86/100
54	71676	Wilmot	AR	47/100	83/100
55	72951	Ratcliff	AR	47/100	83/100
56	72650	Marshall	AR	48/100	67/100
57	72533	Fifty Six	AR	49/100	70/100
58	72834	Dardanelle	AR	49/100	87/100
59	71671	Warren	AR	50/100	88/100
60	71827	Buckner	AR	50/100	86/100
61	71842	Horatio	AR	50/100	85/100
62	72075	Jacksonport	AR	50/100	76/100
63	72175	Wabbaseka	AR	50/100	73/100
64	72365	Marked Tree	AR	50/100	85/100
65	72682	Valley Springs	AR	50/100	77/100
66	72855	Paris	AR	51/100	89/100
67	72021	Brinkley	AR	52/100	89/100
68	72683	Vendor	AR	53/100	84/100
69	72020	Bradford	AR	54/100	80/100
70	72025	Casa	AR	54/100	87/100
71	72701	Fayetteville	AR	54/100	83/100
72	72702	Fayetteville	AR	54/100	97/100
73	72703	Fayetteville	AR	54/100	83/100
74	72704	Fayetteville	AR	54/100	83/100
75	71640	Eudora	AR	55/100	77/100
76	71861	Taylor	AR	55/100	78/100
77	72086	Lonoke	AR	55/100	85/100
78	72330	Dyess	AR	55/100	80/100
79	72350	Joiner	AR	55/100	63/100
80	72544	Henderson	AR	56/100	61/100
81	71857	Prescott	AR	57/100	94/100
82	72032	Conway	AR	57/100	77/100
83	72033	Conway	AR	57/100	89/100
84	72034	Conway	AR	57/100	82/100
85	72035	Conway	AR	57/100	89/100
86	72616	Berryville	AR	57/100	78/100
87	72074	Hunter	AR	60/100	66/100
88	72076	Jacksonville	AR	60/100	83/100
89	72108	Monroe	AR	60/100	73/100
90	72313	Bassett	AR	60/100	66/100
91	72338	Frenchmans Bayou	AR	60/100	73/100
92	72424	Datto	AR	60/100	53/100
93	72449	O Kean	AR	60/100	53/100
94	72462	Reyno	AR	60/100	75/100
95	72473	Tuckerman	AR	60/100	74/100
96	72564	Oil Trough	AR	60/100	68/100
97	72617	Big Flat	AR	60/100	70/100
98	72633	Everton	AR	60/100	70/100
99	72685	Western Grove	AR	60/100	86/100
100	72821	Altus	AR	60/100	86/100

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.