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General Inquiry:

Corporate Office

1006 Western Avenue

Mosinee, WI 54455


Fox Cities Branch

1907 American Drive, Suite A3

Neenah, WI 54956


Madison Branch

1320 Mendota St. Suite 120

Madison, WI 53714


Sheboygan Branch

2109 Erie Ave, Suite 103

Sheboygan, WI 

NorthStar Environmental Testing, LLC (NorthStar) was established in 2009 to provide a cost effective environmental consulting option for the Central Wisconsin area. We have had the pleasure to assist commercial, industrial, and residential customers throughout Wisconsin and neighboring states with their environmental testing and inspection needs.


As our reputation has grown, so has our company. In order to continue to meet the needs of our clients, NorthStar continues to grow  with the addition of offices in the Fox Cities (Appleton), Madison, and Sheboygan. We feel it is extremely important to provide a local contact and immediate response capability should the need arise. 


NorthStar’s staff brings a combined 80 years of experience in the environmental consulting, health & safety, and industrial hygiene fields. We appreciate all the relationships we have built, and we are excited to continue to build these relationships well into the future. We at NorthStar will strive to meet and exceed all customer expectations while keeping customer costs as reasonable as possible.

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