Health Risk Limit Rules for Groundwater
2012/2013 Amendment Information
Updated October 2013:
The 2012/2013 Amendments to the Health Risk Limit Rules for Groundwater have been adopted. A copy of the current rule can be viewed on the website of the Office of the Revisor of Statutes under Minnesota Rules Chapter 4717.7860 and Chapter 4717.7500.
Health-based guidance for water is a concentration of a chemical (or a mixture of chemicals) in drinking water that is likely to pose little or no health risk to humans. Health Risk Limits (HRLs), a type of health-based guidance, are adopted through a formal rulemaking process authorized in the 1989 Groundwater Protection Act (Minnesota Statutes 103H.201 Health Risk Limits).
MDH is proposing amendments to the current Health Risk Limit rules for Groundwater (Minnesota Rules, Parts 4717.7860 and 4717.7500) in 2013.
There are currently 12 chemicals with guidance values in the proposed rules amendments. The amendments add HRL values for six groundwater contaminants to the existing rule and update (replace) HRL values published in 1993 or 1994 for six additional contaminants. The HRL values for each chemical in the proposed amendments are identical to the Health-Based Values (HBVs) that appear currently in the Human Health-Based Water Guidance Table. The HBVs for each chemical can be viewed from the links on this page.
Guidance values: Information about chemicals with guidance values in the proposed rules amendments is available.
Request for Comments: A Request for Comments was published in the July 9, 2012 issue (Volume 37, Number 2) of the State Register. The comment period is now closed.
Public Meeting: A public meeting was held August 28, 2012. Please see 2012/2013 Amendment - Public Meeting for more information.
Proposed Rules: The proposed rules amendments in the March 11, 2013 Minnesota State Register are now available for viewing. See Proposed Rules Amendments.
Statement of Need and Reasonableness (SONAR): The SONAR provides detailed information about the proposed rules amendments.
Notice of Adoption: A Notice of Adoption of the proposed rules amendments was published September 23, 2013 in the Minnesota State Register. The rules will become official on September 30, 2013. (See Adopted Permanent Rules Relating to Health Risk Limits for Groundwater Standards)