Lander, WY Radon Mitigation and Testing

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

Based on 11 user-submitted tests, the average radon level is 8.20 pCi/L.

Q: What EPA Radon Zone is Lander in?

Lander is in Fremont County, EPA Zone 1.

Q: How much does radon mitigation cost in Lander?

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

Avg: 8.20 pCi/L

Fremont County

EPA Zone 1

11 user tests

Situated in Fremont County at the foot of the Wind River Range, Lander demonstrates concerning radon levels with an average of 8.18 pCi/L from 11 tested properties — well above the EPA action threshold. The area's uranium-bearing granite formations and intermountain valley location contribute to consistently elevated readings across the 82520 zip code area.

8.20

pCi/L average

Above EPA Action Level

Based on 11 user-submitted radon tests for homes in Lander, WY. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Lander, WY Radon Mitigation

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

Lander, WY Radon Testing

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

Lander, Wyoming Radon Levels

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

Radon Level	City	Home Age	Foundation	Submitted
5 pCi/L	Lander, WY	51-99 Years	Full Basement	Aug 2025
7 pCi/L	Lander, WY	100+ Years	No Basement/All Crawl Space	Mar 2025
3 pCi/L	Lander, WY	51-99 Years	No Basement/All Crawl Space	Jan 2025
13 pCi/L	Lander, WY	100+ Years	Partial Basement	Apr 2023
10 pCi/L	Lander, WY	21-50 Years	No Basement/All Crawl Space	Jul 2021

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

Lander Radon Facts

Key details about the radon risk profile for Lander and the 82520 zip code area.

EPA Radon Zone

Zone 1 — High Risk

County

Fremont County, WY

Zip Code

82520

Predicted Screening Level

> 4.0 pCi/L (Zone 1)

Avg. User Submitted Level

8.20 pCi/L

User Tests Submitted

Lander and the 82520 zip code are located in Fremont 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 Lander, WY

What is the average radon level in Lander, WY?

Based on 11 user-submitted tests, the average radon level in Lander is 8.20 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 Lander in?

Lander and the 82520 zip code are in Fremont 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 Lander?

Radon mitigation in Lander 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 Lander?

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