Códigos ZIP con más infracciones de la EPA en Wyoming

Out of 36 ZIP codes with data in Wyoming, these are the highest-ranked areas for recorded epa violations. See also: National ZIP Codes with Most EPA Water Violations | All Wyoming Rankings

Statistic	Value
ZIP codes ranked	36
Highest value	196
Median value	3
State	Wyoming

Top 36 Worst ZIP Codes

Rank	ZIP Code	City	State	Recorded EPA Violations	Safety Score
1	83001	Jackson	WY	196	63/100
2	83014	Wilson	WY	188	—
3	82701	Newcastle	WY	162	—
4	82501	Riverton	WY	88	36/100
5	82301	Rawlins	WY	38	53/100
6	83101	Kemmerer	WY	10	60/100
7	83116	Diamondville	WY	10	60/100
8	83121	Frontier	WY	10	—
9	82001	Cheyenne	WY	8	63/100
10	82716	Gillette	WY	7	64/100
11	82834	Buffalo	WY	7	62/100
12	82005	Fe Warren Afb	WY	6	65/100
13	82604	Casper	WY	6	63/100
14	83118	Etna	WY	6	—
15	83127	Thayne	WY	6	—
16	83128	Alpine	WY	6	—
17	82601	Casper	WY	5	64/100
18	82007	Cheyenne	WY	4	66/100
19	82414	Cody	WY	3	66/100
20	82644	Mills	WY	3	65/100
21	82901	Rock Springs	WY	3	66/100
22	82930	Evanston	WY	3	66/100
23	82937	Lyman	WY	3	—
24	82009	Cheyenne	WY	2	65/100
25	82443	Thermopolis	WY	2	—
26	82609	Casper	WY	2	66/100
27	82636	Evansville	WY	2	—
28	82718	Gillette	WY	2	66/100
29	82727	Rozet	WY	2	66/100
30	82935	Green River	WY	2	66/100
31	83112	Bedford	WY	2	—
32	83120	Freedom	WY	2	—
33	82070	Laramie	WY	1	66/100
34	82072	Laramie	WY	1	66/100
35	82520	Lander	WY	1	49/100
36	82637	Glenrock	WY	1	—

Methodology

Violation counts include all types recorded in the EPA SDWIS database: Maximum Contaminant Level (MCL) violations, treatment technique violations, and monitoring/reporting violations. Both resolved and unresolved violations are counted. Higher counts may reflect longer system histories or larger service areas.

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: 2026-08-31.

Frequently Asked Questions

What counts as an EPA water violation?

EPA violations include exceeding Maximum Contaminant Levels (MCLs), failing to treat water properly (treatment technique violations), and not testing or reporting on schedule (monitoring violations). Health-based violations are the most serious.

Does a high violation count mean the water is unsafe now?

Not necessarily. Many violations are historical or monitoring-related. However, a pattern of repeated violations indicates systemic issues with water system management or infrastructure.

Códigos ZIP con más infracciones de la EPA en Wyoming — 2026