Health Risk Limits Rules for Groundwater
2016/2018 Amendments - Contaminants
MDH proposes amendments to the Health Risk Limits (HRLs) Rules approximately every two years. This allows new and updated human health-based water guidance values to be considered for adoption into rule.
Information about contaminants included in the current HRL Rules Amendments proposal is available below.
|Chemical Abstract Service
||Previously adopted values in HRL Rule? (year adopted)|
|187022-11-3||Acetochlor ESA||Yes (2011)|
|184992-44-4||Acetochlor OXA||Yes (2011)|
|159-59-2||cis-1,2-Dichloroethene||Yes (2009)||94-75-7||2,4-Dichlorophenoxyacetic acid (2,4-D)||Yes (1993)|
|759-94-4||S-Ethyl-N,N-dipropylthiocarbamate (EPTC)||Yes (1993)|
|375-22-4||Perfluorobutanoate (PFBA)||Yes (2011)|
|335-67-1 (and others)||Perfluorooctanoate (PFOA) and Salts||Yes (2009)|
|1763-23-1 (and others)||Perfluorooctane Sulfonate (PFOS) and Salts||Yes (2009) (Note: this chemical was withdrawn from rulemaking during the March 19, 2018 hearing. The Health-Based Value (HBV) will remain in effect while the chemical is re-evaluated.)|
|75-01-4||Vinyl Chloride||Yes (2009)|