Marshfield, Wisconsin

If you need high-quality food, water, environmental, or milk testing services in Wisconsin, it’s only natural that you want the absolute best. With over 50 years of experience under our belt, we are your go-to testing service for edible, perishable, and time-sensitive products. We understand how to process these delicate materials and deliver accurate results. Developing personal relationships with our customers is important to us.


Choose our Marshfield, laboratory for food, water, environmental or milk testing services.


At our Marshfield laboratory, you’ll benefit from our:

  • Superior customer service
  • Timely turnaround
  • Convenient sample pick-up routes 
  • Multiple report options available – including Excel, PDF, and other electronic formats


To ensure reliable results, we routinely evaluate our performance with internal controls, including check samples, client duplicate samples and re-analysis of archived samples. AgSource Laboratories in Lincoln maintains certifications from:

  • Soil Science Society of America (NAPT-PAP)

  • Agricultural Laboratory Proficiency Program (ALP)

  • Manure Analysis Proficiency (MAP)

Contact Information

If you’re looking for quality food, water, environmental, or milk testing services, contact our Marshfield professionals today!

Order Testing Supplies

Do you need supplies for testing? Just let us know what you are looking to test and we will send you what you need.

Contact Us

Eric Helms-Ags-web

Eric Helms

Director, Milk Laboratory Operations
Becky Newmann-Ags-web

Becky Newmann

Office Services Manager