Ranchester, WY Radon Mitigation and Testing

Q: What is the average radon level in Ranchester, WY?

Based on 2 user-submitted tests, the average radon level is 11.50 pCi/L.

Q: What EPA Radon Zone is Ranchester in?

Ranchester is in Sheridan County, EPA Zone 1.

Q: How much does radon mitigation cost in Ranchester?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Avg: 11.50 pCi/L

Sheridan County

EPA Zone 1

2 user tests

Situated in Sheridan County near the Montana border, Ranchester sits in Wyoming's high plains region where uranium-rich geological formations contribute to elevated radon potential. Testing data from this 82839 zip code area shows an average radon level of 11.5 pCi/L, significantly exceeding the EPA action level of 4.0 pCi/L. Given these elevated readings and the area's geological characteristics, radon testing and mitigation are strongly recommended for all homes.

11.50

pCi/L average

Above EPA Action Level

Based on 2 user-submitted radon tests for homes in Ranchester, WY. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Ranchester, WY Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Ranchester, WY Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Ranchester, Wyoming Radon Levels

User-submitted radon test readings from homes in the Ranchester area.

Radon Level	City	Home Age	Foundation	Submitted
8 pCi/L	Ranchester, WY	0-20 Years	No Basement/All Crawl Space	Feb 2025
15 pCi/L	Ranchester, WY	0-20 Years	No Basement/All Slab	Dec 2024

Have a radon test result for Ranchester? Submit your reading to help other homeowners.

Ranchester Radon Facts

Key details about the radon risk profile for Ranchester and the 82839 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Sheridan County, WY

Zip Code

82839

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

11.50 pCi/L

User Tests Submitted

Ranchester and the 82839 zip code are located in Sheridan County, which has an EPA assigned Radon Zone of 1. A radon zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Ranchester, WY

What is the average radon level in Ranchester, WY?

Based on 2 user-submitted tests, the average radon level in Ranchester is 11.50 pCi/L. This exceeds the EPA's recommended action level of 4.0 pCi/L, and radon testing is recommended for all homes in the area.

What EPA Radon Zone is Ranchester in?

Ranchester and the 82839 zip code are in Sheridan County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

How much does radon mitigation cost in Ranchester?

Radon mitigation in Ranchester typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Ranchester?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.

Most Active Radon Markets in Wyoming

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Lander	8.18 pCi/L	11
Rock Springs	5.22 pCi/L	9
Laramie	5.83 pCi/L	6
Green River	12.60 pCi/L	5
Riverton	8.40 pCi/L	5
Casper	5.60 pCi/L	5
Sheridan	10.75 pCi/L	4
Thayne	9.25 pCi/L	4
Cody	5.75 pCi/L	4
Cheyenne	5.00 pCi/L	4
Thermopolis	5.00 pCi/L	3
Gillette	20.00 pCi/L	1
Jackson	No submissions	0