Health Risk Limit Rules for Groundwater
2014/2015 Amendments - Contaminants

September 2014:

MDH is in the process of amending Minnesota Rules, chapter 4717, part 7860. At this point, MDH has finished selecting contaminants for this rulemaking and has updated and made public health-based guidance values for each of the 14 contaminants. In the coming months MDH will announce a public comment period and provide a statement of need and reasonableness related to these contaminants. Please check back for updates on future steps in rulemaking.

The amendments would add HRL values for eight groundwater contaminants to the existing rule and update (replace) HRL values published in 1993 or 2009 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.

Please click on the links below for more information about the health-based guidance values for each chemical water contaminant that will be included in the next rulemaking.

Chemical Abstract Service
(CAS) Number
Chemical Name
Previously adopted values in HRL Rule? (year adopted)

103-90-2

Acetaminophen

No

79-06-1

Acrylamide

No

25057-89-0

Bentazon

No

80-05-7

Bisphenol A

No

85-68-7

Butyl benzyl phthalate (BBP)

Yes (1993)

7440-43-9

Cadmium

Yes (1993)

84-74-2

Dibutyl phthalate (DBP)

Yes (1993)

117-81-7

Di (2-ethylhexyl) phthalate (DEHP)

Yes
(2009 MCL-Based HRL)

87674-68-8

Dimethenamid

No

163515-14-8

Dimethenamid-p

No

87-86-5

Pentachlorophenol (PCP)

Yes
(2009 MCL-Based HRL)

57-68-1

Sulfamethazine

No

79-01-6

1,1,2-Trichloroethylene (TCE)

Yes
(2009 MCL-Based HRL)

3380-34-5

Triclosan

No

MCL = Environmental Protection Agency's Maximum Contaminant Level

Updated Monday, September 15, 2014 at 01:10PM