Milwaukee, Ozaukee County, Wisconsin
MI02
20400
0.00 - 3.10
3.10
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Trinity Creek was evaluated every two-year cycle from 2014 to 2024 for phosphorus and temperature, both of which were elevated resulting in placement on the Impaired Waters List. The phosphorus impairment is covered by the Milwaukee River TMDL, approved in 2018.Pollutant
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Elevated Water Temperature
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
LFF - Limited Forage Fishery
Priority
Low
Designated Use
LFF - Limited Forage Fishery
303(d) ID
2016-011
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
3/30/2017
Impaired Water Notes
This water was assessed during the 2022 listing cycle; new temperature sample data exceed 2022 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
5/25/2021
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown
Current Use
Unsupported Aquatic Life
Listing Status
TMDL Approved
Attainable Use
LFF - Limited Forage Fishery
Priority
Not Applicable
Designated Use
LFF - Limited Forage Fishery
303(d) ID
2014-13
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, no biological data (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scores) were available to assess biological impairment).
Date
1/16/2014
Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data exceed 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, no biological data (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scores) were available to assess biological impairment.
Date
8/30/2015
Impaired Water Notes
This water was assessed during the 2018 listing cycle; new total phosphorus sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use, however, no biological data (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scores) were available to assess biological impairment.
Date
3/30/2017
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 Aquatic Life use, however, no biological data (i.e. no macroinvertebrate or fish Index of Biotic Integrity (IBI) scores) were available to assess biological impairment.
Date
8/14/2019
Impaired Water Notes
This water was assessed during the 2022 listing cycle; new total phosphorus sample data exceed 2022 WisCALM listing criteria for the Fish Aquatic Life use.
Date
5/25/2021