Health Risk Limit Rules for Groundwater
2012/2013 Rule Information

MDH amended the Current Health Risk Limits Rule for Groundwater (Minnesota Rules, Chapter 4717, Parts 7860 and 7500) in 2013. The Health Risk Limit (HRL) values were developed based on the risk assessment methods promulgated in the 2009 rule, as described in the 2008/2009 Statement of Need and Reasonableness (PDF: 1.05 MB/196 pages).
Substantive changes included:

  • Added new guidance values for six chemicals to Part 4717.7860 of the rule.
  • Outdated HRL values (adopted in 1993 and 1994) for six chemicals were repealed (in Part 4717.7500) and replaced (in Part 4717.7860) by new HRL values.
  • Formatting, notation, and numbering within the rule were updated to improve readability. These changes were cosmetic did not affect water guidance values.

Summary:

For a summary list of chemicals and water guidance values included in the 2012/2013 amendments, see the Summary of the 2012/2013 Health Risk Limits (HRL) Rule Amendments (PDF: 56KB/1 page).

Complete details:

For full details about the rule amendment, see the Statement of Need and Reasonableness (PDF: 1,470KB/179 pages) and the Proposed Rules: (PDF: 281KB/38 pages) published in the Minnesota State Register on March 11, 2013.

2012/2013 HRL Rule Amendment
Steps Timeline Notes
Request for Comments July 9, 2012 The request for comments was published in the July 9, 2012 issue (Volume 37, Number 2) of the State Register.
Public Stakeholder Meetings August 28, 2012 MDH held a public meeting on August 28, 2012 to solicit input. Please see 2012/2013 Amendment - Public Meeting for more information.
Proposed amendments to HRL rules March 4, 2013 The Statement of Need and Reasonableness (PDF: 1,470KB/179 pages) was added to the MDH website.
Notice of Intent to Adopt - Dual Notice March 11, 2013 MDH published a Dual Notice of Intent to Adopt Rules under the Proposed Rules: (PDF: 281KB/38 pages) section in the Minnesota State Register.
Comments/requests for hearing received Official comment period: March 11, 2013 - April 10, 2013.

MDH received no comments or request for hearing during the official comment period.
Adoption of Proposed Rules September 23, 2013 MDH announced the Notice of Adoption of rules in the Minnesota State Register. (See Adopted Permanent Rules Relating to Health Risk Limits for Groundwater Standards(PDF: 275KB/38 pages))
Rules in Effect September 30, 2013 Refer to Minn. Rules Chapter 4717.7860 (see chemicals with "Year Adopted : 2013" notation)
Updated Thursday, August 28, 2014 at 11:41AM