Dilworth grew up around the railroad east of Moorhead, and today it mixes older homes near the center of town with newer subdivisions. Because it's in Clay County, Minnesota, Minnesota's radon rules apply: mitigation must be done by an MDH-licensed professional, and home sellers have disclosure duties.
Newer Dilworth homes: you may already have a passive system
Minnesota's residential building code has required passive radon control features in new homes since 2009: a gas-permeable layer under the slab, a sealed membrane, and a vent pipe from below the slab up through the roof. So if your Dilworth home was built after that, look in the basement for the labeled radon pipe.
A passive system isn't a guarantee. A Minnesota Department of Health study of new homes with passive systems found roughly one in five still tested above the EPA action level of 4 pCi/L. Test, and if your result is high, ask an MDH-licensed professional about adding a fan. The work turns a passive system into an active one, which under Minnesota code has its own requirements and inspection, so make sure the installer handles the permit.
Older Dilworth homes
Older houses may have block basements, partial basements or crawl spaces, and often weren't built with any radon features. Here, a full system is usually needed: a suction point through the slab (or a membrane over crawl space soil), sealing, a fan and an exhaust above the roof. Older basements with lots of openings may need more sealing work, which affects the price.
Winter matters on the prairie
Dilworth's open setting means wind and deep cold. A good installer will slope the pipe so condensation drains back under the slab, insulate or route the pipe to avoid freezing, and place the exhaust where ice won't build up over doors or walkways. See radon systems in winter.
Selling a Dilworth home
Under Minnesota's Radon Awareness Act, sellers disclose what they know about radon testing, results and any system, and provide MDH radon information to the buyer. Keep the system's paperwork and MDH tag information handy.
Get a quote
Send your ZIP code, test result and house age. One MDH-licensed professional who covers Dilworth will contact you. For prices, see the cost guide.
Common questions
My Dilworth home was built after 2009. Does it need a test?
Yes. Minnesota requires passive radon features in new homes, but they do not guarantee low levels. A test is the only way to know.
Who can add a fan to my passive system?
In Minnesota, an MDH-licensed radon mitigation professional. Activating a passive system also has code and permit requirements the installer should handle.
Do Dilworth and Moorhead follow the same radon rules?
Yes. Both are in Minnesota, so the same MDH licensing and Radon Awareness Act rules apply.