Opinion: In Wisconsin’s CAFO Counties, Glyphosate Monitoring Gaps Threaten Groundwater

April 22, 2026 | Source: Wisconsin Watch | by Jeff Bauer

April 22, 1970, was no ordinary day in the bustling city of St. Louis. On this first Earth Day, streets filled with rallies, and lecture halls were packed with attendees. Most famously, rows of students marched through the streets wearing gas masks, protesting air pollution.

Around that time, John E. Franz was brewing up something dark in the depths of Monsanto’s St. Louis lab: glyphosate, an herbicide since linked to widespread environmental harm, cancer concerns and more than 100,000 lawsuits.

While other countries have regulated or limited glyphosate production, the U.S. has largely ignored the problem. In February, President Donald Trump issued Executive Order 14387 to promote the production of glyphosate and security for its producers.

The U.S. is increasingly dependent on glyphosate, and its overuse is becoming a serious concern. Amid the many environmental issues competing for attention, glyphosate deserves a prominent place this Earth Day, especially in Wisconsin.