State regulators in the Twin Cities area are working on rules to manage facilities that produce unpleasant smells. The goal is to address smelly spots in the region. To create these rules, regulators must first determine what constitutes an objectionable odor.

This definition will be a key part of the new regulations. Further information on this development can be found in the Star Tribune, which has more details on the upcoming rules and the process of defining objectionable odors.