The AgSource Food and Environmental Division is the largest independent milk payment testing service in Wisconsin operating from Menomonie and Stratford, Wis. The Stratford laboratory provides 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.

In the past few years, the lab incorporated food pathogen testing, wastewater and residential water testing. Additionally, bedding cultures are available.

An extensive sample transportation system in Wisconsin and neighboring states in addition to electronic access to results allows for quick turnaround time and prompt customer service, making AgSource a leader in the food and environmental testing industry.