Beginning September 1, the application of nitrogen fertilizer in the fall and on frozen soil will be restricted in areas vulnerable to groundwater contamination. This will also apply to Drinking Water Supply Management Areas (DWSMAs) with elevated nitrate levels.

MDA staff have prepared a presentation to explain the purpose of the Groundwater Protection Rule, where the nitrogen fertilizer restrictions apply, and the exceptions to the rule. View the prerecorded presentation or the recorded webinar to learn more (details below).

Prerecorded Presentation (video)

View the Nitrogen Fertilizer Fall Application Restrictions video (YouTube). Posted July 30, 2020.

Recorded Virtual Webinar

A live webinar was offered and recorded on August 12, 2020.

The recorded webinar includes a welcome message from Commissioner Thom Petersen, a presentation to explain the Groundwater Protection Rule and the nitrogen fertilizer restrictions, and concludes with a question and answer session. 

View the Nitrogen Fertilizer Fall Application Restrictions recorded webinar (YouTube) Posted August 19, 2020.


Staff are available to answer questions by email or phone, or you can submit questions during the live webinar. See the “CONTACT US” box for more information.