Minnesota Fluoridation Rule Revision
Chapter 4720.0030, subpart 2

The MDH Drinking Water Protection Section completed its revision of Minnesota Rules 4720.0030, subpart 2. The adopted rules are identical to those proposed.

Minnesota’s new concentrations that municipal public water systems must maintain are:

• Minimum: 0.5 milligrams per liter
• Maximum: 0.9 milligrams per liter, and
• Average of: 0.7 milligrams per liter.

The notice of rule adoption was published in the State Register on March 16, 2020, and the changes became law on March 23, 2020.

• Minnesota State Register, Volume 44, Number 16 (PDF)

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• Pathogen Project
  Virus study about the presence of viruses in Minnesota groundwater.
• Plan Review
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• Basics of Monitoring and Testing of Drinking Water
  How samples are taken, how corrective actions are taken and how treatment is completed.
• About the MDH Drinking Water Protection Program
  General information about MDH's programs that protect drinking water.
• DWP Contacts
  Drinking Water Protection contacts listed by county, office, or topic.