Radon testing
Professional short-term tests from about $150 (typical estimate).
Book a testRadon Mitigation in Mauldin, SC
Mauldin's population has jumped by about a quarter since 2020, and every one of those homes sits in Greenville County, EPA Zone 1. We test, fix and service radon systems throughout the city.
Get a Free Quote Call (727) 300-6656Mauldin's radon backdrop
Mauldin is about 8 miles southeast of downtown Greenville along US 276, firmly inside Greenville County. The EPA rates Greenville as South Carolina's only Zone 1 county, its highest radon-potential tier. The other 45 counties are Zone 2 or 3.
South Carolina's radon program logged 5,220 initial home tests in Greenville County through June 2022. They averaged 3.4 pCi/L, and the highest hit 126.6. The EPA advises fixing homes at 4 pCi/L or above and considering it between 2 and 4.
Radon levels vary house to house, even next door. The EPA estimates radon is the leading cause of lung cancer among people who have never smoked, which is why testing is worth the small effort. You can request a free state kit (one per home, while supplies last) or book a professional test.
Mauldin homes and how we approach them
Mauldin grew from about 24,700 residents in 2020 to an estimated 31,500 and has around 10,800 housing units. Growth has brought new development such as BridgeWay Station, which opened in 2024, alongside established neighborhoods.
That mix shapes the work. A slab home typically gets sub-slab depressurization, with a sealed pipe and fan drawing gas from under the floor and venting it above the roofline. A crawl space home typically gets a heavy plastic membrane sealed over the soil with suction beneath it. Newer Greenville County homes may already have a passive radon pipe from the county's code.
We also hear from Mauldin homeowners who already have a system that has gone quiet. Radon fans usually last five to ten years. If your fan has stopped, the U-tube gauge reads level, or the system was installed by a previous owner and never checked, a repair visit and fresh test can sort it out.
Radon services in Mauldin
Choose the service that matches your situation. Each one comes with a clear written quote.
Radon system repair
Fan replacement and system repair, quoted on site.
Fix a systemSub-slab depressurization
For slab and basement homes. Typical range $900–$2,500.
Sub-slab detailsCrawl space radon mitigation
For crawl space homes. Typical range $1,500–$3,500.
Crawl space detailsAsk for a Mauldin radon quote
Share your address, foundation type and any test numbers. We usually reply the same day. Want numbers first? See our radon mitigation cost guide.
Mauldin radon FAQ
How do I know if my existing radon fan in Mauldin still works?
Check the U-tube manometer on the vent pipe. If both sides of the liquid are level, the fan likely isn't pulling suction. You may also notice the fan is silent or not vibrating. Fans typically last five to ten years. We can diagnose it, replace the fan if needed, and retest the home.
Is Mauldin in a high radon area?
Mauldin is in Greenville County, which is South Carolina's only EPA Zone 1 county. State program data from initial home tests shows a county average of 3.4 pCi/L. Many homes test lower and some much higher, so the zone is a reason to test, not a verdict on any particular house.
How soon after installation can I retest?
The system needs time to run and let conditions under the home settle before a test means much. We schedule a follow-up radon test after installation to confirm levels have dropped. After that, retesting every couple of years, or after major renovations, is a good habit.
Other areas near Mauldin
We serve these neighboring communities as well.
Know your number. Fix it if it's high.
Free radon mitigation quotes across the Upstate — usually a same-day reply.