Least Reliable Water Systems in Arkansas — 2026

Out of 706 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	706
Lowest value	10/100
Median value	80/100
State	Arkansas

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Reliability Score	Safety Score
1	71662	Pickens	AR	10/100	33/100
2	72368	Moro	AR	10/100	57/100
3	71770	Waldo	AR	15/100	55/100
4	71825	Blevins	AR	15/100	62/100
5	71837	Fouke	AR	15/100	67/100
6	71922	Antoine	AR	15/100	55/100
7	71940	Delight	AR	15/100	55/100
8	71957	Mount Ida	AR	15/100	50/100
9	72029	Clarendon	AR	15/100	57/100
10	72181	Wooster	AR	15/100	75/100
11	72327	Crawfordsville	AR	15/100	81/100
12	72360	Marianna	AR	15/100	65/100
13	72554	Mammoth Spring	AR	15/100	45/100
14	72801	Russellville	AR	15/100	65/100
15	72802	Russellville	AR	15/100	65/100
16	72811	Russellville	AR	15/100	70/100
17	72812	Russellville	AR	15/100	66/100
18	72833	Danville	AR	15/100	62/100
19	72853	Ola	AR	15/100	67/100
20	71630	Arkansas City	AR	18/100	71/100
21	72928	Branch	AR	20/100	66/100
22	72824	Belleville	AR	21/100	77/100
23	71653	Lake Village	AR	25/100	52/100
24	71801	Hope	AR	25/100	78/100
25	71802	Hope	AR	25/100	78/100
26	71858	Rosston	AR	25/100	62/100
27	72036	Cotton Plant	AR	25/100	73/100
28	72624	Compton	AR	25/100	55/100
29	72644	Lead Hill	AR	25/100	55/100
30	72761	Siloam Springs	AR	25/100	48/100
31	72936	Greenwood	AR	25/100	71/100
32	72937	Hackett	AR	25/100	49/100
33	71961	Oden	AR	26/100	46/100
34	71966	Oden	AR	26/100	35/100
35	71826	Bradley	AR	28/100	74/100
36	71765	Strong	AR	30/100	72/100
37	72073	Humphrey	AR	30/100	71/100
38	72628	Deer	AR	30/100	80/100
39	71852	Nashville	AR	31/100	78/100
40	71960	Norman	AR	31/100	63/100
41	72176	Ward	AR	31/100	83/100
42	72851	New Blaine	AR	31/100	73/100
43	72944	Mansfield	AR	31/100	71/100
44	71701	Camden	AR	35/100	74/100
45	71711	Camden	AR	35/100	85/100
46	72175	Wabbaseka	AR	35/100	73/100
47	72672	Pyatt	AR	35/100	66/100
48	71937	Cove	AR	36/100	78/100
49	72650	Marshall	AR	38/100	67/100
50	72007	Austin	AR	40/100	93/100
51	72342	Helena	AR	40/100	55/100
52	72350	Joiner	AR	40/100	63/100
53	72682	Valley Springs	AR	40/100	77/100
54	72544	Henderson	AR	41/100	61/100
55	72021	Brinkley	AR	42/100	89/100
56	72384	Turrell	AR	42/100	87/100
57	72020	Bradford	AR	44/100	80/100
58	72025	Casa	AR	44/100	87/100
59	72701	Fayetteville	AR	44/100	83/100
60	72702	Fayetteville	AR	44/100	97/100
61	72703	Fayetteville	AR	44/100	83/100
62	72704	Fayetteville	AR	44/100	83/100
63	72753	Prairie Grove	AR	44/100	86/100
64	71861	Taylor	AR	45/100	78/100
65	71676	Wilmot	AR	47/100	83/100
66	71857	Prescott	AR	47/100	94/100
67	72032	Conway	AR	47/100	77/100
68	72033	Conway	AR	47/100	89/100
69	72034	Conway	AR	47/100	82/100
70	72035	Conway	AR	47/100	89/100
71	72834	Dardanelle	AR	47/100	87/100
72	72951	Ratcliff	AR	47/100	83/100
73	72072	Humnoke	AR	49/100	85/100
74	72533	Fifty Six	AR	49/100	70/100
75	71842	Horatio	AR	50/100	85/100
76	72075	Jacksonport	AR	50/100	76/100
77	72365	Marked Tree	AR	50/100	85/100
78	72473	Tuckerman	AR	50/100	74/100
79	72617	Big Flat	AR	50/100	70/100
80	72855	Paris	AR	51/100	89/100
81	71663	Portland	AR	52/100	78/100
82	72083	Keo	AR	53/100	86/100
83	72439	Walnut Ridge	AR	53/100	95/100
84	72476	Walnut Ridge	AR	53/100	86/100
85	72661	Oakland	AR	53/100	70/100
86	72683	Vendor	AR	53/100	84/100
87	71640	Eudora	AR	55/100	77/100
88	71652	Kingsland	AR	55/100	86/100
89	72003	Almyra	AR	55/100	84/100
90	72004	Altheimer	AR	55/100	76/100
91	72086	Lonoke	AR	55/100	85/100
92	72123	Patterson	AR	55/100	84/100
93	72330	Dyess	AR	55/100	80/100
94	71958	Murfreesboro	AR	57/100	69/100
95	72364	Marion	AR	57/100	86/100
96	72396	Wynne	AR	57/100	84/100
97	72616	Berryville	AR	57/100	78/100
98	72631	Eureka Springs	AR	57/100	75/100
99	72632	Eureka Springs	AR	57/100	77/100
100	72947	Mulberry	AR	57/100	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.