Radon Mitigation in Hallsville, Missouri

About Hallsville

Hallsville is a small community in northern Boone County, located about 12 miles north of Columbia along Route B. The town has a quiet, rural character, with homes surrounded by open farmland and wooded areas. Many homes in the Hallsville area were built with full or partial basements, and crawl-space foundations are also common.

Like the rest of Boone County, Hallsville sits on geology that produces radon. Missouri DHSS reports that radon is present in every Missouri county, and that one in three homes tested through its residential testing program had results above the recommended action level. The only way to know whether your Hallsville home has elevated radon is to test.

Testing your Hallsville home

Every home in Hallsville should be tested for radon at least once. Basement homes are particularly important to test, because radon enters through the basement floor and walls, and basements are often the lowest lived-in level of the home where test kits should be placed.

Short-term tests (2–7 days) give a quick snapshot, while long-term tests (90+ days) provide a better picture of your year-round average. Missouri residents may request one free short-term radon test kit per household while supplies last through the Missouri DHSS. For real-estate transactions, Missouri recommends professional testing with a continuous radon monitor.

If your result is at or above 4.0 pCi/L, the EPA and Missouri DHSS recommend taking action to reduce radon in your home.

Mitigation for Hallsville homes

Many Hallsville homes have basements or crawl spaces, and the mitigation approach depends on your foundation type:

• Basement homes: Sub-slab depressurization is the most common approach. A pipe is installed through the basement floor slab, connected to a fan, and routed to the exterior where radon is vented above the roofline. The sump pit may also be sealed and incorporated into the system.
• Crawl-space homes: A vapor barrier is sealed over the crawl-space soil, and a fan draws radon from beneath the barrier. Crawl-space vents may be sealed depending on the system design.
• Slab-on-grade homes: Less common in the Hallsville area, but if present, a suction point is drilled through the slab and routed to the exterior.

A qualified radon professional can evaluate your home and recommend the right system. Missouri recommends checking NRPP or NRSB certification.

Cost of mitigation in Hallsville

Missouri DHSS reports that radon mitigation commonly ranges from approximately $500 to $2,500, depending on the home's size and construction. Basement homes with straightforward pipe routing may fall on the lower end of the range, while crawl-space homes requiring a vapor barrier may cost more. The only way to know the cost for your specific home is to request a quote.

Radon and home sales in Hallsville

Radon testing is commonly part of the inspection contingency during real-estate transactions in the Hallsville area. Missouri recommends professional testing for legal-transaction testing. If the result is at or above 4.0 pCi/L, mitigation can be negotiated between buyer and seller. A pre-listing test can help sellers understand their home's level and address it proactively.