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Milk & Dairy
Payment Milk
Controlling Mastitis
Milk Standards
Other Services

Milk & Dairy


AgSource tests over 1 million milk and dairy samples each year.

Wisconsin is world famous for producing delicious dairy products, but it all starts with high-quality milk. AgSource Laboratories, conveniently located in Marshfield, Wis. and Menomonie, Wis., specialize in milk testing. We analyze samples from a diverse client base throughout Wisconsin and surrounding states. Call AgSource today to learn how we can provide the milk and dairy testing services you need.

Payment Milk Testing - Fat, Protein, Somatic Cell Count (SCC), and more
Controlling Mastitis - DNA testing and Culturing
Milk Standards - FDA-certified milk calibration standards provider
Other Services - Equipment calibration, Phosphatase testing, and       
                          Pasteurized Waste Milk analysis

Customer Service

From milk payment analysis to rapid pathogen tests, AgSource provides the data you need with the respect you deserve. Our laboratory technicians are highly skilled and dedicated to providing fast and reliable service at a fair price. Whether they submit 50 samples or 5,000 samples, we have a personal relationship with our customers and strive to meet their individual needs. Our capabilities are not limited to the services mentioned in this brochure. Contact AgSource to discuss how we can meet your unique needs.


Forget the hassles of shipping. Drop off your samples at one of our convenient pick-up locations. Call today to find out when we will be in an area near you. All milk components and somatic cell tests are conducted within 24 hours of arrival at the laboratory. Official monthly test results can be transferred directly to state regulatory agencies. Dairy plants and their patrons can utilize our free, secure, online log-in system to access their test results immediately. Results can be sent via email, fax, or standard postal service. Let us know which works best. 

Trusted Results

Over the past 50 years, AgSource has built a solid reputation based on reliable service and accurate results. We are certified by the Wisconsin Department of Agriculture, Trade and Consumer Protection and follow Interstate Milk Shippers (IMS) protocols.  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.

AgSource Laboratories - Marshfield, Wis.715-898-1402