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Blacktrail Environmental

Name: Blacktrail Environmental
Address: Bismarck, ND

Radon professional based in Bismarck, Burleigh County, ND

Contact on the state list	John Spilman
Listed as	Radon Measurement Contractor
Status	On the North Dakota DEQ contractor list; the list is not an endorsement
Based in	Bismarck, Burleigh County, North Dakota
Cities and travel, per the state list	Will Travel 150 miles

"Based in" is the city and county of the address on the business's license record. That can be a mailing address; it doesn't tell you where the business works.

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We publish these details as they appear on the state list. Being on it is not a state license, and we do not vouch for the business. Before hiring, ask to see a current radon certification and a current certificate of insurance.

Checked against North Dakota DEQ radon contractor list, last checked 2026-11-02. See the issuing agency.

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