Landmark Environmental

Licensed professional: Allison Mastenbrook

Landmark Environmental holds Minnesota Department of Health radon mitigation license RMIT-00138 and is registered in Bloomington. MDH lists the services offered as: single family mitigation, multi family mitigation, schools & large buildings mitigation, single family measurement, multi family measurement, schools & large buildings measurement. Published service area: Statewide. This license appeared on the MDH service provider list at our last weekly check.

On the current MDH listRadon mitigation license

License number	RMIT-00138
License type	Radon mitigation
Licensed professional	Allison Mastenbrook
Company	Landmark Environmental
Location on file	9555 James Avenue South, suite 262, Bloomington, MN, 55431
Phone on file	(651) 295-9400
Services listed	Single Family Mitigation, Multi Family Mitigation, Schools & Large Buildings Mitigation, Single Family Measurement, Multi Family Measurement, Schools & Large Buildings Measurement
Service area	Statewide
First seen on the MDH list	July 29, 2026
Last seen on the MDH list	July 29, 2026

Website listed with MDH: landmarkenv.com

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This profile is compiled automatically from the Minnesota Department of Health's public radon licensing list. It is public information, not a review, rating, or endorsement, and absence of a flag is not a guarantee. Verify current licensure with MDH before signing anything.Checked against the MDH list: July 29, 2026.