Kansas Cities Ranked by Indoor Radon Levels
Measured averages from Airthings devices across Kansas, USA. Action level: 4 pCi/L — the threshold at which remediation is recommended.
Louisburg has the highest measured indoor radon in Kansas at 5.8 pCi/L, based on Airthings measurements across 47 cities.
Updated August 16, 2026
Highest city
5.8pCi/L
Louisburg
Kansas city average
3.3pCi/L
across 47 cities
Above action level
11/ 47
cities
| # | Location | Avg level | Monitors | vs action level |
|---|---|---|---|---|
| 1 | Louisburg | 5.8 pCi/L | 8 | 1.5× over |
| 2 | Gardner | 5.3 pCi/L | 25 | 1.3× over |
| 3 | Wellsville | 5.3 pCi/L | 6 | 1.3× over |
| 4 | Roeland Park | 5.1 pCi/L | 8 | 1.3× over |
| 5 | Westwood | 4.8 pCi/L | 30 | 1.2× over |
| 6 | Olathe | 4.8 pCi/L | 160 | 1.2× over |
| 7 | Mission | 4.4 pCi/L | 14 | 1.1× over |
| 8 | Spring Hill | 4.3 pCi/L | 26 | 1.1× over |
| 9 | Tonganoxie | 4.3 pCi/L | 10 | 1.1× over |
| 10 | Shawnee | 4.2 pCi/L | 19 | 1.1× over |
| 11 | Valley Center | 4.2 pCi/L | 8 | 1.1× over |
| ✓ Below EPA action level (4 pCi/L) | ||||
| 12 | Merriam | 3.9 pCi/L | 8 | 1.0× under |
| 13 | Pittsburg | 3.8 pCi/L | 12 | 0.9× under |
| 14 | Prairie Village | 3.7 pCi/L | 21 | 0.9× under |
| 15 | Mission Hills | 3.7 pCi/L | 31 | 0.9× under |
| 16 | McPherson | 3.6 pCi/L | 9 | 0.9× under |
| 17 | Haysville | 3.5 pCi/L | 11 | 0.9× under |
| 18 | Dodge City | 3.5 pCi/L | 8 | 0.9× under |
| 19 | Hays | 3.4 pCi/L | 14 | 0.8× under |
| 20 | Leawood | 3.4 pCi/L | 105 | 0.8× under |
| 21 | Topeka | 3.3 pCi/L | 47 | 0.8× under |
| 22 | Junction City | 3.3 pCi/L | 8 | 0.8× under |
| 23 | Salina | 3.2 pCi/L | 9 | 0.8× under |
| 24 | Lenexa | 3.2 pCi/L | 150 | 0.8× under |
| 25 | Hutchinson | 3.1 pCi/L | 9 | 0.8× under |
| 26 | Basehor | 3.0 pCi/L | 9 | 0.7× under |
| 27 | Leavenworth | 3.0 pCi/L | 20 | 0.7× under |
| 28 | Overland Park | 2.9 pCi/L | 74 | 0.7× under |
| 29 | Park City | 2.9 pCi/L | 7 | 0.7× under |
| 30 | Manhattan | 2.7 pCi/L | 26 | 0.7× under |
| 31 | Lawrence | 2.7 pCi/L | 96 | 0.7× under |
| 32 | Edwardsville | 2.6 pCi/L | 24 | 0.7× under |
| 33 | Kansas City | 2.6 pCi/L | 7 | 0.6× under |
| 34 | Maize | 2.6 pCi/L | 35 | 0.6× under |
| 35 | Wichita | 2.5 pCi/L | 41 | 0.6× under |
| 36 | Silver Lake | 2.4 pCi/L | 6 | 0.6× under |
| 37 | Oskaloosa | 2.4 pCi/L | 8 | 0.6× under |
| 38 | Clay Center | 2.4 pCi/L | 7 | 0.6× under |
| 39 | Goddard | 2.4 pCi/L | 18 | 0.6× under |
| 40 | Fairway | 2.2 pCi/L | 9 | 0.6× under |
| 41 | Andover | 2.2 pCi/L | 35 | 0.6× under |
| 42 | Lansing | 2.1 pCi/L | 9 | 0.5× under |
| 43 | Bellaire | 2.1 pCi/L | 29 | 0.5× under |
| 44 | Bonner Springs | 2.1 pCi/L | 24 | 0.5× under |
| 45 | Derby | 2.0 pCi/L | 9 | 0.5× under |
| 46 | Emporia | 1.9 pCi/L | 14 | 0.5× under |
| 47 | Coffeyville | 0.5 pCi/L | 13 | 0.1× under |