2026 Repeal of Health Risk Values Rule

In March 2002, the Minnesota Department of Health (MDH) promulgated Health Risk Values (HRVs) – Minnesota Rules 4717.8000 to 4717.8600 – for chemicals in ambient air. These values were meant to help evaluate potential health risks from air pollution. 

MDH is proposing to remove the now outdated HRV rules through the Minnesota Administrative Procedure Act process for repealing obsolete rules.

The 2002 HRVs have not been updated to reflect current science, methods, or toxicology data. MDH no longer recommends using these values, and in some cases, newer and more accurate Air Guidance Values are available. Keeping outdated values in rule makes it harder for MDH to provide the best and most up-to-date air quality guidance. 

Stay informed

Sign up for GovDelivery to receive updates about this rule repeal and related MDH air quality guidance. There will be a 60-day public comment period once the notice of repeal is published on the Minnesota State Register.

2002 HRVs SONAR and administrative rules

The Statement of Need and Reasonableness (SONAR) (PDF) for the 2002 HRV rulemaking provides a thorough description of the scientific methods and principles used to develop now outdated HRVs.

Administrative rules