State Reviews Nitrate Safety Rule

By Scout Nelson

The Minnesota Department of Agriculture (MDA) reminds the public that written comments on the state’s Groundwater Protection Rule must be submitted by Thursday, March 12. The department is encouraging residents, researchers, and stakeholders to share useful information that can help guide future decisions about environmental protection.

The MDA is reviewing the rule to determine whether it continues to protect Minnesota’s air, water, land, and natural resources from nitrate pollution. Officials are also examining whether additional restrictions may be necessary to strengthen protection in vulnerable areas. This review follows a Sept. 5, 2025, order from the Ramsey County Second Judicial District Court directing the MDA to make findings on the rule’s effectiveness.

Adopted in 2019, the Groundwater Protection Rule aims to reduce nitrate contamination in sensitive groundwater areas and protect drinking water supplies. The rule limits nitrogen fertilizer application during the fall season and frozen soils. It also provides a system for reducing contamination in locations where public water supplies already show elevated nitrate levels.

During the review, the MDA is specifically requesting information on whether the current rule adequately protects against nitrate contamination from MDA regulated practices. The agency is also seeking feedback on whether further restrictions should be applied to sensitive regions, including Southeast Minnesota’s karst geology and the Central Sands region.

Officials emphasize that comments should include supporting evidence. Statements that only show support or opposition without facts or explanation will not help the department in its decision-making process. Clear, informative, and evidence-based feedback is encouraged to ensure the review is meaningful and balanced.

Comments must be submitted by March 12. The public can send feedback by email to gpr.mda@state.mn.us with the subject line “Groundwater Protection Rule.” Written comments can also be mailed to the Fertilizer Management Unit at the Minnesota Department of Agriculture in St. Paul.

This public comment period allows the state to gather ideas and scientific input while maintaining a balance between environmental safety and practical agricultural practices. The goal is to protect drinking water and natural resources while supporting responsible land management across Minnesota.

Photo Credit: minnesota-department-of-agriculture