Radon Mitigation in Cheyenne, Wyoming
Cheyenne is the capital of one of the highest-radon states in the US. Wyoming's statewide average indoor radon level is approximately 6.7 pCi/L — nearly double the EPA action level of 4 pCi/L. Laramie County, where Cheyenne sits, is designated EPA Radon Zone 1. If you own a home in Cheyenne, testing for radon is essential.
Wyoming & Cheyenne Radon Facts
- •EPA Zone 1: Laramie County is designated Zone 1 — the EPA's highest risk tier — where predicted average indoor radon levels exceed 4 pCi/L.
- •State average 6.7 pCi/L: Wyoming consistently ranks among the top five states for indoor radon concentration. This average is nearly double the EPA action level and more than three times the recommended target of 2 pCi/L.
- •60–65% of homes affected: Surveys of Wyoming homes indicate the majority test above the EPA's 4 pCi/L action threshold.
- •Geology: Cheyenne sits on the high plains east of the Laramie Mountains. The underlying sedimentary layers and proximity to uranium-rich Precambrian basement rock mean radon migrates freely into basement foundations.
- •Elevation factor: At 6,062 feet, Cheyenne experiences long cold winters — homes stay sealed for months, concentrating radon that would otherwise dissipate.
Why Cheyenne Homeowners Should Test
Radon is odorless, colorless, and invisible — the only way to know your exposure level is to test. The EPA and Surgeon General recommend testing every home below the third floor. In Wyoming, that recommendation carries real urgency:
- 1.
The odds are against you. With 60–65% of Wyoming homes testing above the action level, statistically speaking, your home is more likely than not to have elevated radon.
- 2.
Lung cancer risk is real and cumulative. Radon is the second leading cause of lung cancer in the US — roughly 21,000 deaths per year. Risk builds with every year of elevated exposure.
- 3.
Neighbor's results don't predict yours. Radon levels vary dramatically house-to-house based on foundation type, soil permeability, and interior pressure. Only your test counts.
- 4.
Real estate value. Wyoming buyers increasingly request radon test results. A mitigated home with a documented system commands buyer confidence and smoother closings.
Radon Mitigation Costs in Cheyenne, WY
Professional radon mitigation in Cheyenne typically runs $900–$2,200, with most homeowners paying around $1,200–$1,600 for a standard sub-slab depressurization (SSD) system. Factors affecting price include foundation type (basement, slab, or crawl space), home size, number of suction points, and soil conditions beneath the slab.
SSD systems draw radon from beneath the foundation through PVC piping and exhaust it above the roofline using a continuously running fan. Typical reduction: 50–99%. Annual electricity cost for the fan: roughly $30–$50. Systems last 10–20+ years with periodic maintenance.
How Radon Mitigation Works
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Diagnostic assessment
A certified contractor measures your radon level and inspects the foundation to plan the mitigation approach.
- 2
System installation
Sub-slab depressurization or crawl space encapsulation, typically completed in 4–8 hours with no major disruption to the home.
- 3
Post-mitigation test
Conducted 24–48 hours after installation to confirm the system has reduced levels below the action threshold.
- 4
Long-term monitoring
Retest every 1–2 years. Systems are low-maintenance but should be verified periodically to confirm continued effectiveness.
Protect Your Cheyenne Home from Radon
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