Ozaukee, Washington County, Wisconsin
MI02, MI05, MI06
15000
29.33 - 68.50
39.17
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
PCBs delisted in 2006. New data verify general fish consumptions advisory only, not specific advisory. This segment of Milwaukee River was evaluated every two-year cycle from 2014 to 2024; elevated phosphorus was identified in the 2014 cycle and elevated temperature in the 2016 cycle. New data in 2020 confirmed temperature listing. Phosphorus was confirmed every two year cycle from 2016 and 2024. PFOS sampling in 2020 found no elevated levelsPollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Elevated Water Temperature
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
Default - Fish and Aquatic Life
Priority
Low
Designated Use
Default - Fish and Aquatic Life
303(d) ID
2016-007
Listing Date
4/1/2016
Impaired Water Notes
This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use.
Date
8/30/2015
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new temperature sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
4/12/2017
Impaired Water Notes
This water was assessed during the 2020 listing cycle; temperature sample data exceed 2020 WisCALM listing criteria for the Fish and Aquatic Life use. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
6/17/2019
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown
Current Use
Unsupported Aquatic Life
Listing Status
TMDL Approved
Attainable Use
Default - Fish and Aquatic Life
Priority
Not Applicable
Designated Use
Default - Fish and Aquatic Life
303(d) ID
2014-5
Listing Date
4/1/2014
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
Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus sample data exceed 2014 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data do not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category).
Date
1/16/2014
Impaired Water Notes
This water was assessed during the 2020 listing cycle; new total phosphorus sample data exceed 2020 WisCALM listing criteria for the Fish and Aquatic Life use, however, available biological data do not indicate impairment (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the "poor" condition category). Based on the most updated information, no change in existing impaired waters listing is needed.
Date
6/17/2019
Impaired Water Notes
This water was assessed during the 2022 cycle; new phosphorus sample data exceeded 2022 WisCALM listing criteria for Aquatic Life use.
Date
6/21/2021
Pollutant
PCBs
Listed For
Fish and Aquatic Life
Impairments
NA
Current Use
Unsupported Aquatic Life
Listing Status
Water Delisted
Attainable Use
Default - Fish and Aquatic Life
Priority
Delisted 2006
Designated Use
Default - Fish and Aquatic Life
303(d) ID
619
Listing Date
4/1/1998
Impaired Water Notes
Available sediment data shows that PCB levels fall below the impairment threshold. This PCB listing was proposed for removal from the impaired waters list in 2006.
Date
4/1/2006