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

December 2015:

MDH conducted rulemaking during 2014-2015 to amend the Health Risk Limits (HRL) Rules.

The amendments added HRL values for eight groundwater contaminants to the existing rule and updated (replaced) HRL values published in 1993 or 2009 for six additional contaminants. The HRL values for each chemical in the proposed amendments were identical to the Health-Based Values (HBVs) that were announced via GovDelivery at the conclusion of each review during 2012 to 2014.

Please click on the links below for more information about the HRL values that were adopted into rule in 2015.

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 Tuesday, January 05, 2016 at 03:59PM