Impaired Water - Milwaukee River (Milwaukee River)
Ozaukee County, Wisconsin
MI02
15000
19.35 - 29.33
9.98
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
On 303d list. TMDL was approved for this segment of the Milwaukee River along with the Cedar Creek PCB TMDL in 2008.

This water was assessed during the 2014 listing cycle; biological sample data met 2014 WisCALM listing thresholds for the Fish and Aquatic Life use (i.e. macroinvertebrate or fish Index of Biotic Integrity (IBI) average scored in the fair to excellent condition categories).

This water was assessed during the 2018 listing cycle; new chloride and biological (fish Index of Biotic Integrity (IBI) scores) sample data were clearly below 2018 WisCALM listing thresholds for the Fish and Aquatic Life use.

Assessments during the 2020 listing cycle showed new bug sample data were in good condition.
Listing Details
Pollutant
PCBs
Listed For
Fish Consumption
Impairments
PCBs Contaminated Fish Tissue
Current Use
Specific Restricted Fish Consumption
Listing Status
TMDL Approved
Attainable Use
Unrestricted Fish Consumption
Priority
Not Applicable
Designated Use
Unrestricted Fish Consumption
303(d) ID
291
Listing Date
4/1/1998
Impaired Water Notes
The Milwaukee River Segment 2 extends from the Thiensville Dam at river mile 20 to the Lime
Kiln Dam at river mile 30 in the Village of Grafton. River Segment 2 includes the Thiensville
Impoundment, a 700-acre and 5-miles of free-flowing river. Median surficial PCB sediment
concentrations are approximately 0.2 mg/kg and 1 mg/kg at intermediate sediment depths. While
Thiensville Impoundment sediments contribute to PCB contamination in Milwaukee River fish
and wildlife, the greatest benefit toward reducing PCBs in Milwaukee River fish and wildlife
populations would result following an expedited remediation of PCB contaminated sediment in
Cedar Creek (Baird & Associates, 1997).
Date
8/29/2008

Impaired Water Notes
The Cedar Creek & Milwaukee River PCBs TMDL was approved by the USEPA September 23, 2008.
Date
9/23/2008

 
Pollutant
E. coli
Listed For
Recreation
Impairments
Recreational Restrictions - Pathogens
Current Use
Restricted Recreation
Listing Status
TMDL Approved
Attainable Use
Full Body Contact - Swimming, Boating
Priority
Not Applicable
Designated Use
Full Body Contact - Swimming, Boating
303(d) ID
291
Listing Date
4/1/1998
Impaired Water Notes
The Milwaukee River Watershed TMDL was approved by the EPA on March 9, 2018 and covers waters in the basin impaired for Total Phosphorus, Sediment/Total Suspended Solids, and bacteria (E. coli and Fecal Coliform).
Date
3/9/2018