Radon Mitigation in Anderson, SC
Anderson County has one of the lower radon averages in the Upstate. It also had a home test at 38.0 pCi/L. In the Electric City, the only number that matters is the one in your house.
Get a Free Quote Call (727) 300-6656A low average can hide a high reading
Anderson County is Zone 2 on the EPA radon map, and its state test average is the lowest of the five Upstate counties we serve: 1.7 pCi/L across 711 initial tests. That sounds reassuring until you see the maximum. One Anderson County home measured 38.0 pCi/L, nearly ten times the EPA action level of 4 pCi/L.
That gap is the whole point. Radon depends on the soil, rock and construction under each house. A neighbor's result, or a county average, can't predict yours. The EPA recommends testing every home regardless of zone.
The EPA estimates radon is the second leading cause of lung cancer overall and the leading cause among non-smokers. A test costs little and takes a few days.
Homes in the Electric City
Anderson earned its nickname in 1895 when it became one of the first cities in the South with hydroelectric power. The city has grown from 28,106 residents in 2020 to an estimated 31,323 in 2025, and the county added 1,493 new-home permits in 2025.
That mix means older in-town homes alongside newer subdivisions, with a median home value around $218,200. Many Upstate homes sit on crawl spaces or slabs, and older homes may have basements. Some Anderson houses already have a radon system from a previous owner, and a fan that has gone quiet is a common call. Fans typically last 5 to 10 years.
For permits and code questions inside city limits, the City of Anderson Building & Codes office is at 601 S. Main St.
Our Anderson radon services
- Radon testing: professional short-term tests from about $150.
- Sub-slab depressurization: slab and basement systems, typically $900–$2,500.
- Crawl space radon mitigation: membrane plus fan, typically $1,500–$3,500.
- Radon system repair: fan replacement and fixes for existing systems, quoted on site.
We finish every new install with a follow-up test. If you're weighing a result between 2 and 4 pCi/L, our guide on what to do between 2 and 4 walks through the choice.
Free radon quotes in Anderson
Send your test result or tell us you need one. We usually respond the same day.
Anderson radon FAQ
Anderson County's radon average is 1.7. Should I still test?
Yes. The 1.7 pCi/L average comes from 711 initial tests, and the highest Anderson County result was 38.0 pCi/L. Averages blend high and low homes together. The EPA recommends testing every home, fixing at 4 pCi/L or above, and considering a fix between 2 and 4.
My Anderson home already has a radon pipe. How do I know it's working?
Check the U-tube gauge on the pipe; if the liquid levels are even, the fan may not be pulling. Listen for the fan running too. Fans typically last 5 to 10 years. We can inspect the system, replace the fan if needed, and retest the home.
Who handles building permits for radon work in Anderson?
Inside city limits, the City of Anderson Building & Codes office at 601 S. Main St. handles permits and code questions. Homes outside the city fall under Anderson County. We can explain what applies to your address when we visit for your free estimate.
Nearby service areas
We also work in these towns around Anderson.
Know your number. Fix it if it's high.
Free radon mitigation quotes across the Upstate — usually a same-day reply.