Hollis, OK Radon Mitigation and Testing

Q: What EPA Radon Zone is Hollis in?

Hollis is in Harmon County, EPA Zone 3.

Q: How much does radon mitigation cost in Hollis?

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

Harmon County

EPA Zone 3

Remote Harmon County encompasses Hollis in Oklahoma's southwestern plains, where Permian redbeds and gypsum formations characterize the local geology. Although radon testing data for zip code 73550 is currently limited, residents should establish baseline readings through professional testing. The area's typical single-story homes with slab-on-grade or crawl space foundations reflect construction practices adapted to the region's expansive soils and extreme weather patterns.

Hollis, OK Radon Mitigation

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

Hollis, OK Radon Testing

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

Hollis Radon Facts

Key details about the radon risk profile for Hollis and the 73550 zip code area.

EPA Radon Zone

Zone 3 — Low Risk

County

Harmon County, OK

Zip Code

73550

Predicted Screening Level

< 2.0 pCi/L (Zone 3)

Hollis and the 73550 zip code are located in Harmon County, which has an EPA assigned Radon Zone of 3. A radon zone of 3 predicts an average indoor radon screening level less than 2 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Hollis, OK

What EPA Radon Zone is Hollis in?

Hollis and the 73550 zip code are in Harmon County, which has an EPA assigned Radon Zone of 3. A zone of 3 predicts an average indoor radon screening level less than 2 pCi/L.

How much does radon mitigation cost in Hollis?

Radon mitigation in Hollis 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 Hollis?

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 Oklahoma

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

City	Avg User Radon Level	Submissions
Tulsa	8.14 pCi/L	7
Oklahoma City	7.00 pCi/L	1
Edmond	5.00 pCi/L	1