1st Defense Radon
✓ MDH licensedRadon measurementRadon mitigation
Cottage Grove, MN · Washington County
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Contact
Phone
(651) 503-3131Website
firstdefenseradon.comAddress
9120 Hillside Tr S, Cottage Grove, MN 55016
Licence / certification
- MDH radon: Single Family Measurement, Single Family Mitigation
- Service area (per MDH): 50 miles
People on the record
- Steve Larsen (RMITS-00063)
Source: MDH list, retrieved 2026-10-12.