Health Risk Limits Rules
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Environmental Health Division
Current Health Risk Limits Rules for Groundwater
Minnesota Rules, chapter 4717
The Minnesota Department of Health (MDH) promulgates Health Risk Limits (HRLs) Rules for chemicals in groundwater used as drinking water. MDH rulemaking was authorized under the 1989 Groundwater Protection Act. Rules were promulgated in 1993, 1994, 2007, 2009, 2011, 2013, 2015, and 2018. MDH is initiating rulemaking in 2020 to amend the HRL Rules. Please see Rule Amendments - Overview and Links for more information. To view existing MDH water guidance, which include HRLs, please see the Human Health-Based Water Guidance Table.
Administrative Rules
The Health Risk Limits are established in Minnesota Administrative Rules, Parts 4717.7810 through 4717.7900, as listed below.
| 4717.7810 | Health Risk Limits; Purpose and Scope. |
| 4717.7820 | Definitions. |
| 4717.7830 | For Toxic Effects Other Than Cancer. |
| 4717.7840 | For Cancer. |
| 4717.7850 | Use of Maximum Contaminant Levels. |
| 4717.7860 | Health Risk Limits Table. |
| 4717.7865 | Health Risk Limits for Triclosan. |
| 4717.7870 | Evaluating Concurrent Exposures to Multiple Chemicals. |
| 4717.7880 | Multiple Chemical Health Risk Limits: Noncancer. |
| 4717.7890 | Multiple Chemical Health Risk Limits: Cancer. |
| 4717.7900 | Chemical Breakdown Products. |
| 4717.7500* | 1993-94 Health Risk Limits. |
*IMPORTANT NOTE: HRLs listed in this Part are in effect unless superseded by a newer HRL. Check Part 4717.7860 before using a value from Part 4717.7500, or use the Human Health-based Water Guidance Values Table to find the appropriate value.