San Luis, CO Radon Mitigation and Testing

Q: What EPA Radon Zone is San Luis in?

San Luis is in Costilla County, EPA Zone 2.

Q: How much does radon mitigation cost in San Luis?

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

Costilla County

EPA Zone 2

San Luis, CO resides in Costilla County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. Testing is recommended for all homes in the 81134 zip code area.

San Luis, CO Radon Mitigation

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

San Luis, CO Radon Testing

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

San Luis Radon Facts

Key details about the radon risk profile for San Luis and the 81134 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Costilla County, CO

Zip Code

81134

Predicted Screening Level

2–4 pCi/L (Zone 2)

San Luis and the 81134 zip code are located in Costilla County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for San Luis, CO

What EPA Radon Zone is San Luis in?

San Luis and the 81134 zip code are in Costilla County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

How much does radon mitigation cost in San Luis?

Radon mitigation in San Luis 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 San Luis?

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 Colorado

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

City	Avg User Radon Level	Submissions
Fairplay	12.00 pCi/L	9
Crested Butte	8.56 pCi/L	9
Denver	6.22 pCi/L	9
Montrose	9.25 pCi/L	8
Gunnison	7.38 pCi/L	8
Buena Vista	12.57 pCi/L	7
Pueblo	10.67 pCi/L	6
Grand Junction	8.17 pCi/L	6
Bayfield	6.00 pCi/L	6
Canon City	10.80 pCi/L	5
Aurora	7.40 pCi/L	5
Windsor	7.00 pCi/L	5
Telluride	6.80 pCi/L	5
Parker	5.40 pCi/L	5
Salida	15.50 pCi/L	4
Johnstown	9.50 pCi/L	4
Granby	9.00 pCi/L	4
Longmont	8.00 pCi/L	4
Edwards	6.75 pCi/L	4
Mancos	6.00 pCi/L	4