Answers to the questions Huntsville homeowners ask most, based on EPA and Alabama Department of Public Health guidance. Each answer is short; follow the links for detail.
What is radon?
Radon is a colorless, odorless radioactive gas that forms naturally when uranium in soil and rock breaks down. It moves up through the ground and can collect in homes. The EPA estimates radon causes about 21,000 lung cancer deaths a year in the U.S.
Is Madison County a high-radon area?
Yes. Madison County is EPA Zone 1, the highest-potential category, and ADPH lists it among Alabama's 15 highest-potential counties. CDC data compiled by the American Lung Association shows a mean of 4.0 pCi/L across 5,178 Madison County tests.
What radon level needs fixing?
The EPA recommends fixing a home at 4 pCi/L or higher and suggests considering a fix between 2 and 4 pCi/L.
How long does a radon test take?
Short-term tests run 2 to 90 days; most last 2 to 7 days. Real estate tests usually use a continuous monitor for at least 48 hours. Long-term tests run more than 90 days and give a better yearly average.
Is a store-bought kit good enough?
For a first screen in a home you own, yes, if you follow the instructions closely. For real estate deals, confirming a high result, or checking a new system, a certified professional test is a better choice.
How much does radon mitigation cost?
Prices vary by house. As a typical national range, Angi's 2026 data puts active radon mitigation systems at about $805 to $1,326, averaging about $1,043. Larger or more complex homes cost more. Local professionals quote each home individually.
How long does installation take?
Most single-suction-point systems are installed in a single day. Crawl space membranes, multiple suction points, or interior pipe routes can take longer.
Will a system lower my radon below 4 pCi/L?
In most homes a properly designed active system brings levels well below 4 pCi/L. A post-mitigation test, at least 24 hours after start-up and within 30 days, confirms it. Ask the installer for a written reduction guarantee.
Are radon fans loud? What do they cost to run?
A properly mounted fan in the attic or outdoors usually makes a low hum. It runs continuously, and electricity cost depends on the fan's wattage; ask the installer for the model's rating.
Can radon get into well water?
Yes. Radon dissolved in well water can be released into the air during showers and laundry. Most Huntsville homes are on public water, but if your home has a private well, ask about a water test.
Who pays for radon mitigation in a home sale?
It's negotiated. Sellers often install a system or give a credit when a buyer's test is high. Check your contract and talk with your agent.
Do crawl space homes need a different system?
Usually. The common crawl space fix is sub-membrane depressurization: a sealed plastic barrier over the soil with a fan drawing from beneath it.
Does homeowners insurance cover radon?
Standard homeowners policies generally don't cover radon testing or mitigation, since it's treated as a maintenance and environmental issue. Check your own policy.
Does Alabama require a radon license?
No. Alabama has no state radon licensing law. Ask for NRPP or NRSB certification, the national programs ADPH points residents to.
Is this a radon company?
No. Huntsville Radon Mitigation is a free referral service. We connect you with independent, certified local professionals who quote and perform the work.