Radon Levels in Hermosa, SD
Hermosa is in Custer County. Radon data is tracked at the county level by the EPA and CDC.
EPA predicts average indoor levels between 2–4 pCi/L in this county · Source: EPA, CDC
Tipper's take on radon in Hermosa
Hermosa is in Custer County, EPA Zone 2, a moderate risk classification. The EPA predicts average indoor radon levels between 2 and 4 pCi/L here. CDC data from Custer County puts the average measured radon level at 30.1 pCi/L.
"Moderate" is the zone people underestimate most. Some homes in Hermosa will test at 1 pCi/L, others at 7 pCi/L. The county average doesn't tell you which side your home falls on.
A $15 test kit answers the question for good. If you're below 4 pCi/L, you can stop thinking about it. If you're above, mitigation systems in South Dakota typically cost $800–$2,000 and work well.
Sources: EPA Radon Zone Map, CDC Environmental Public Health Tracking
Test Your Home in Hermosa
A short-term test kit costs about $15, includes the lab fee, and gives you a result in 48 hours. It's the only way to know your home's actual radon level.
Radon Professionals Serving South Dakota
We don't have contractor listings for this area yet.
The EPA maintains a national directory of certified radon professionals.
Full County Data
Radon data is tracked at the county level. For state comparisons, nearby counties, and detailed analysis, see the full county page.
Custer County, SD: Full Radon Data →Radon FAQ: Hermosa, SD
What is the radon risk in Hermosa?
Hermosa is in Custer County, which the EPA classifies as Zone 2 (Moderate risk). The county average is 30.1 pCi/L. The EPA recommends testing every home regardless of zone. Radon levels vary house to house.
How do I test my home in Hermosa for radon?
Place a short-term radon test kit in the lowest livable level of your home for 48 hours under closed-house conditions. Kits cost about $15 and include the lab fee. Keep windows and exterior doors closed during the test (normal entry/exit is fine). Results come back in about a week.
What should I do if radon is high in my Hermosa home?
If your test result is at or above 4 pCi/L, the EPA recommends installing a mitigation system. A certified contractor can install one for $800–$2,000 in most cases. The system runs continuously and typically brings levels well below 2 pCi/L. Retest after installation to confirm.