Radon Mitigation in Western Minnesota
Western Minnesota's radon story is written by a lake that vanished ten thousand years ago. The Red River Valley around Moorhead is the bed of Glacial Lake Agassiz, a nearly flat plain of silty, clay-rich soils, and Clay County carries the EPA's Zone 1 rating, the highest radon potential category on its map.
Statewide, the Minnesota Department of Health reports 2 in 5 tested homes at levels posing a significant health risk, and the valley's deep basements and long heating season keep it squarely in that picture. We connect homeowners in Moorhead and the surrounding Red River Valley towns with independent, MDH-licensed mitigation contractors for free quotes.
Radon on the Lake Agassiz Plain
The DNR describes the Red River Valley as the deep-water basin of Glacial Lake Agassiz, a nearly featureless plain of poorly drained silty and clayey soils. Those fine-grained sediments are exactly the kind of material MDH points to when it attributes Minnesota radon to uranium decaying in rocks and soil. Clay County's Zone 1 rating on the EPA map reflects it, and Clay County maintains its own radon program page for residents.
Source: Minnesota DNR, Red River Valley SectionClay Soils and Valley Basements
Valley homes are built with full, deep basements, and the flood history of the Red River means sump baskets and drain tile are standard equipment. For radon work that cuts both ways: sump pits are a known soil-gas entry route MDH lists, and they are also a ready-made suction point a licensed contractor can seal and draw from. Clay soils that shrink and crack in dry seasons open additional gas pathways along foundations.
Source: MDH radon programA Two-State Metro with One-State Licensing
Fargo-Moorhead is one housing market split by a state line, and the licensing law changes at the river. Work on the Minnesota side falls under the Minnesota Radon Licensing Act, Minnesota Statutes 144.4961: anyone mitigating for compensation in Moorhead or Dilworth needs an MDH license and tags the system accordingly, whichever side of the river their office sits on. Verify any firm, Fargo-based or not, in the MDH lookup before work starts on a Minnesota home.
Source: Minn. Stat. 144.4961Western Minnesota Cities We Cover
Start with the service you need, Radon Mitigation or New Construction Radon , or go deeper with the guide: Radon Mitigation Cost in Minnesota .
Verify Your Contractor's Minnesota Radon License
Before you hire anyone for radon work in Western Minnesota, check their license. The Minnesota Radon Licensing Act, Minnesota Statutes section 144.4961, requires anyone who performs radon testing, mitigation, or laboratory analysis for compensation to be licensed by the Minnesota Department of Health, and every mitigation system installed under the law must carry an MDH system tag. A licensed professional expects the question. Three things to ask before you sign:
- Can I see your current MDH radon license, and is the company licensed too?
- Will the installed system carry the MDH system tag required under the licensing law?
- Will I get a written, itemized estimate and a follow-up radon test that confirms the system works?
Western Minnesota Radon Questions
Does the Red River Valley's clay soil cause high radon?
The valley floor is the old bed of Glacial Lake Agassiz, silty and clay-rich per the DNR, and Clay County is rated Zone 1, the EPA's highest radon potential category. Fine-grained glacial sediments carry the uranium decay chain MDH identifies as Minnesota's radon source, so elevated indoor readings are common valley-wide.
Can a Fargo contractor legally mitigate my Moorhead home?
Only with a Minnesota license. The Minnesota Radon Licensing Act applies to radon work performed for compensation in Minnesota regardless of where the company is based, so a Fargo firm working in Moorhead needs an MDH license and applies the MDH system tag. The MDH lookup verifies any company in seconds.
My sump pit runs constantly in the spring. Does that affect radon?
Open sump baskets are one of the soil-gas entry routes MDH lists, and valley homes rely on them heavily. Mitigation contractors routinely seal the sump with an airtight lid and use the basket or drain tile as the system's suction point, which addresses radon without touching the pump's flood duty.
Get a Free Radon Mitigation Quote
Tell us about your home and get a free, no-obligation quote from an independent radon mitigation contractor licensed by the Minnesota Department of Health.
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