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Why we regulate
Learn what types of wastewater discharges are regulated and how
Plan review
The DNR reviews plans for municipal and industrial wastewater treatment plant construction
Discharge permits
Wastewater discharges to surface or groundwaters
Contact information
For information contact:
Kari Fleming
Biomonitoring Coordinator
Environmental Toxicologist
(608) 267-7663

Consultants with TRE experience in Wisconsin

A "toxicity reduction evaluation" (TRE) is a study intended to determine those actions necessary to remove toxicity. A TRE may identify a simple solution such as improved housekeeping procedures or require a more extensive investigation to identify cost-effective treatment or source reduction options. A "toxicity identification evaluation (TIE)" is one step in the TRE, where effluent samples are manipulated to remove suspect compounds and then re-tested to see if toxicity remains.

Photo of fathead minnow eggs

The following is a partial list of consultants who have performed successful TRE investigations for Wisconsin permittees in the recent past (and have submitted results to the WDNR or have otherwise made the WDNR aware of these studies). This list is not an official endorsement or recommendation by the Department. The Department does not have the authority to certify or register laboratories to conduct TREs. This is merely a listing of consultants that have been involved in successful TRE investigations where a cause or source was found and toxicity issues resolved. This list is updated as the Department becomes aware of new consultants experienced in performing TREs. If you wish to add or change information on this list, please send supporting information to: Biomonitoring Coordinator, Bureau of Water Quality, 101 S. Webster St., P.O. Box 7921, Madison, WI 53707-7921

Consultant Name/Contact
Address Phone Email
Environmental Consulting & Testing
Patrick Poirier or Katie Wormer
1423 N 8th Street
Superior, WI 54880
(715) 392-6635
Liza Heise
201 Summit View Drive
Lower Level
Brentwood, TN 37027
(615) 277-7517
REI Consultants, Inc.
Ed J. Kirk
Beaver, WV 25813
(304) 255-2500
Sanders & Associates
Dave Sanders
6065 West Shore Road
Land O'Lakes, WI 54540
(715) 547-6720
Last revised: Thursday July 26 2018