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

June 2014:

The chemical water contaminants listed below have been detected in Minnesota waters. MDH is considering adopting recently derived health-based guidance values for these contaminants into Minnesota Rules, chapter 4717, part 7860.

The amendments would add HRL values for six 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. This list is subject to change. Please check back for updates.

Please click on the links below for more information about the health-based guidance values for each chemical water contaminant below.

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


* New (2014) Health-based guidance values for this chemical will be published prior to rulemaking because this chemical is currently under re-evaluation. The new values will update values derived in 1993, 2010, and 2012.
MCL = Environmental Protection Agency's Maximum Contaminant Level

Updated Wednesday, 02-Jul-2014 07:24:41 CDT