Wisconsin Dairy Farm Secures CAFO Permit Amid Environmental Concerns

Gilbert Farms, located in Sevastopol, Wisconsin, has been granted a concentrated animal feeding operation (CAFO) permit by the Wisconsin Department of Natural Resources (DNR), effective from July 1, 2026. This permit allows the expansion of the dairy farm's livestock capacity from 1,443 to 2,430 animal units. The farm will now house 1,150 milking and dry cows, 900 heifers, and 400 calves, making it the third official CAFO in Door County.

In Wisconsin, a CAFO designation is mandatory for livestock operations exceeding 1,000 animal units, roughly equivalent to 715 milking cows. The permit is valid for five years, expiring on June 30, 2031. Gilbert Farms joins other large-scale producers in the area, such as S&S Jerseyland Dairy and Brey Cycle Farm, with permits for 9,596 and 1,788 animal units, respectively.

The approval process was delayed due to public opposition, leading to a public hearing on November 5, 2025, which was attended by over 300 residents. Concerns were raised about potential groundwater contamination and agricultural runoff, given the local geography of fractured bedrock and shallow soil. A sinkhole near the farm raised additional fears about environmental risks.

In response to these concerns, the DNR issued a 45-page Notice of Final Determination, addressing resident objections and implementing environmental safeguards. Gilbert Farms must submit groundwater monitoring plans by October 1, 2026, three years earlier than initially required, and install monitoring wells within 90 days of plan approval. The farm is also required to increase its manure storage capacity to at least 180 days by December 31, 2026, and follow strict nutrient management protocols.

This expansion marks a significant development in Wisconsin's agricultural sector, reflecting ongoing tensions between agricultural growth and environmental preservation.