Highest Radon Risk ZIP Codes in Kansas — 2026

Out of 396 ZIP codes with data in Kansas, these are the lowest-ranked areas for radon zone. See also: National ZIP Codes with Highest Radon Risk | All Kansas Rankings

Statistic	Value
ZIP codes ranked	396
Lowest value	Zone 1 (High)
Median value	Zone 1 (High)
State	Kansas

100 Lowest-Ranked ZIP Codes

Rank	ZIP Code	City	State	Radon Zone	Safety Score
1	66040	Lacygne	KS	Zone 1 (High)	50/100
2	66048	Leavenworth	KS	Zone 1 (High)	53/100
3	66025	Eudora	KS	Zone 1 (High)	55/100
4	66018	De Soto	KS	Zone 1 (High)	58/100
5	66012	Bonner Springs	KS	Zone 1 (High)	60/100
6	66086	Tonganoxie	KS	Zone 1 (High)	60/100
7	66020	Easton	KS	Zone 1 (High)	61/100
8	66007	Basehor	KS	Zone 1 (High)	63/100
9	66021	Edgerton	KS	Zone 1 (High)	63/100
10	66044	Lawrence	KS	Zone 1 (High)	63/100
11	66006	Baldwin City	KS	Zone 1 (High)	64/100
12	66047	Lawrence	KS	Zone 1 (High)	64/100
13	66049	Lawrence	KS	Zone 1 (High)	64/100
14	66030	Gardner	KS	Zone 1 (High)	65/100
15	66031	New Century	KS	Zone 1 (High)	65/100
16	66043	Lansing	KS	Zone 1 (High)	65/100
17	66045	Lawrence	KS	Zone 1 (High)	65/100
18	66061	Olathe	KS	Zone 1 (High)	65/100
19	66062	Olathe	KS	Zone 1 (High)	65/100
20	66083	Spring Hill	KS	Zone 1 (High)	65/100
21	66109	Kansas City	KS	Zone 1 (High)	65/100
22	66215	Lenexa	KS	Zone 1 (High)	65/100
23	66219	Lenexa	KS	Zone 1 (High)	65/100
24	66046	Lawrence	KS	Zone 1 (High)	66/100
25	66097	Winchester	KS	Zone 1 (High)	66/100
26	66101	Kansas City	KS	Zone 1 (High)	66/100
27	66102	Kansas City	KS	Zone 1 (High)	66/100
28	66103	Kansas City	KS	Zone 1 (High)	66/100
29	66104	Kansas City	KS	Zone 1 (High)	66/100
30	66105	Kansas City	KS	Zone 1 (High)	66/100
31	66106	Kansas City	KS	Zone 1 (High)	66/100
32	66111	Kansas City	KS	Zone 1 (High)	66/100
33	66112	Kansas City	KS	Zone 1 (High)	66/100
34	66160	Kansas City	KS	Zone 1 (High)	66/100
35	67735	Goodland	KS	Zone 1 (High)	66/100
36	67801	Dodge City	KS	Zone 1 (High)	66/100
37	66027	Fort Leavenworth	KS	Zone 1 (High)	67/100
38	66085	Stilwell	KS	Zone 1 (High)	67/100
39	66202	Mission	KS	Zone 1 (High)	67/100
40	66203	Shawnee	KS	Zone 1 (High)	67/100
41	66204	Overland Park	KS	Zone 1 (High)	67/100
42	66205	Mission	KS	Zone 1 (High)	67/100
43	66206	Leawood	KS	Zone 1 (High)	67/100
44	66207	Overland Park	KS	Zone 1 (High)	67/100
45	66208	Prairie Village	KS	Zone 1 (High)	67/100
46	66209	Leawood	KS	Zone 1 (High)	67/100
47	66210	Overland Park	KS	Zone 1 (High)	67/100
48	66211	Leawood	KS	Zone 1 (High)	67/100
49	66212	Overland Park	KS	Zone 1 (High)	67/100
50	66213	Overland Park	KS	Zone 1 (High)	67/100
51	66214	Overland Park	KS	Zone 1 (High)	67/100
52	66216	Shawnee	KS	Zone 1 (High)	67/100
53	66217	Shawnee	KS	Zone 1 (High)	67/100
54	66218	Shawnee	KS	Zone 1 (High)	67/100
55	66220	Lenexa	KS	Zone 1 (High)	67/100
56	66221	Overland Park	KS	Zone 1 (High)	67/100
57	66223	Overland Park	KS	Zone 1 (High)	67/100
58	66224	Overland Park	KS	Zone 1 (High)	67/100
59	66226	Shawnee	KS	Zone 1 (High)	67/100
60	66227	Lenexa	KS	Zone 1 (High)	67/100
61	66002	Atchison	KS	Zone 1 (High)	—
62	66013	Bucyrus	KS	Zone 1 (High)	—
63	66019	Clearview City	KS	Zone 1 (High)	—
64	66023	Effingham	KS	Zone 1 (High)	—
65	66041	Lancaster	KS	Zone 1 (High)	—
66	66051	Olathe	KS	Zone 1 (High)	—
67	66052	Linwood	KS	Zone 1 (High)	—
68	66058	Muscotah	KS	Zone 1 (High)	—
69	66063	Olathe	KS	Zone 1 (High)	—
70	66110	Kansas City	KS	Zone 1 (High)	—
71	66113	Edwardsville	KS	Zone 1 (High)	—
72	66115	Kansas City	KS	Zone 1 (High)	—
73	66117	Kansas City	KS	Zone 1 (High)	—
74	66118	Kansas City	KS	Zone 1 (High)	—
75	66119	Kansas City	KS	Zone 1 (High)	—
76	66201	Mission	KS	Zone 1 (High)	—
77	66222	Mission	KS	Zone 1 (High)	—
78	66225	Overland Park	KS	Zone 1 (High)	—
79	66250	Shawnee Mission	KS	Zone 1 (High)	—
80	66251	Overland Park	KS	Zone 1 (High)	—
81	66276	Shawnee Mission	KS	Zone 1 (High)	—
82	66282	Overland Park	KS	Zone 1 (High)	—
83	66283	Overland Park	KS	Zone 1 (High)	—
84	66285	Lenexa	KS	Zone 1 (High)	—
85	66286	Shawnee	KS	Zone 1 (High)	—
86	66403	Axtell	KS	Zone 1 (High)	—
87	66404	Baileyville	KS	Zone 1 (High)	—
88	66406	Beattie	KS	Zone 1 (High)	—
89	66407	Belvue	KS	Zone 1 (High)	—
90	66408	Bern	KS	Zone 1 (High)	—
91	66411	Blue Rapids	KS	Zone 1 (High)	—
92	66412	Bremen	KS	Zone 1 (High)	—
93	66415	Centralia	KS	Zone 1 (High)	—
94	66416	Circleville	KS	Zone 1 (High)	—
95	66417	Corning	KS	Zone 1 (High)	—
96	66418	Delia	KS	Zone 1 (High)	—
97	66419	Denison	KS	Zone 1 (High)	—
98	66422	Emmett	KS	Zone 1 (High)	—
99	66424	Everest	KS	Zone 1 (High)	—
100	66425	Fairview	KS	Zone 1 (High)	—

Methodology

Radon rankings are based on EPA county-level radon zone classifications. Zone 1 (highest risk) has predicted average indoor radon levels above 4 pCi/L — the EPA action level. Zone 2 is moderate (2-4 pCi/L) and Zone 3 is low (below 2 pCi/L). Within Zone 1, ZIP codes are sub-ranked by Home Safety Score to prioritize areas with compounding risk factors.

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: 2026-08-14.

Frequently Asked Questions

What is EPA Radon Zone 1?

Zone 1 is the EPA highest-risk classification, meaning the county has predicted average indoor radon levels above 4 pCi/L — the level at which the EPA recommends mitigation. Radon causes about 21,000 lung cancer deaths per year in the U.S.

Should I test for radon?

The EPA recommends testing all homes regardless of radon zone. A DIY test kit costs $15-40. Professional testing costs $150-250. If levels exceed 4 pCi/L, mitigation systems ($800-2,500) can reduce radon by up to 99%.