DHI Agronomy Turf Food & MilkWater & EnvironmentalAbout AgSourceLocations News Contact
Food & Milk
Milk Standards
Milk & Dairy Product Testing
Nutritional Labeling Testing
Vitamin Testing
Yeast and Mold Testing
Pasteurized Waste Milk Analysis
Finished Product and Pathogen Testing
Miscellaneous Services
Milk Payment Testing
Bacterial Culturing
Bulk Tank Cultures
Individual Cow Cultures
Bedding Cultures
Forms & Information
Milk Quality and Mastitis Control
What Is a Mastitis Problem
Contagious Mastitis Pathogens
Streptococcus Agalactiae
Staphylococcus Aureus
Mycoplasma species
Environmental Mastitis Pathogens
Environmental Streptococci
Coagulase-Negative Staphylococcus (CNS)
Food & Product Analysis
For Questions About Food & Milk?

Food & Milk


Testing Services

In operation since 1959, AgSource Laboratories has more than 45 years of experience in the business of analyzing milk and milk products for payment and herd management purposes. AgSource is recognized for providing fast, accurate and reliable service at a fair price, a reputation we have achieved through our constant commitment to the highest level of customer service.

The AgSource Food and Environmental Division is the largest independent milk payment testing service in Wisconsin operating from Menomonie and Marshfield, Wis. Marshfield laboratories provide comprehensive milk culturing and sensitivity testing to aid in milk quality and mastitis control. AgSource provides milk standard calibration sets to milk labs nationwide from its Menomonie location.

The lab has incorporated food pathogen testing, wastewater and residential water testing. Additionally, bedding cultures are available.


Working with an independent, third party service provider increases credibility with your patrons, and no one has more credibility with producers than AgSource. Each year, AgSource Laboratories conduct more than one million payment tests. In addition, over 4.3 million individual cow samples are tested by our DHI Laboratory making AgSource one of the largest milk testing service providers in the United States.

Customer Service

In order to get your samples to the laboratory as quickly as possible and in the best possible condition, AgSource operates a fleet of transportation vans and professional courier services. All milk components and somatic cell tests are conducted within 24 hours of arrival at the laboratory.


After the analysis is complete, we work with clients to provide the most convenient access to information. Through electronic data retrieval, test results are available in a timely and convenient manner. Results may be faxed, e-mailed or transmitted directly to your computer. They also can be accessed at your convenience directly through the Web site. Since test results are posted on our Web site daily, clients and patrons easily can download the most up-to-date herd management information.


The laboratory is certified by the Wisconsin Department of Natural Resources (WDNR), Wisconsin Department of Agriculture Trade and Consumer Protection (WDATCP) and Environmental Protection Agency (EPA).

We also participate in various check sample programs.

For more information on Food or Milk Testing Services contact us at one of our laboratories below:  

Laboratory Locations:

AgSource Laboratories - Marshfield, WI715-898-1402marshfield@agsource.com
AgSource Laboratories - Menomonie, WI715-235-1128menomonie@agsource.com