Impaired Water - Unnamed (South Branch Of Underwood Creek)
Milwaukee, Waukesha County, Wisconsin
MI03
16800
0.00 - 1.11
1.11
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
South Branch Of Underwood Creek was identified as impaired in 2012 for degraded biological communities caused by high phosphorus. This listing is part of the Milwaukee River TMDL, approved in 2018. During the 2018 cycle chloride was identified as causing toxicity for organisms in the stream. Assessments in 2022 confirmed the phosphorus and chloride listings.
Listing Details
Pollutant
Chloride
Listed For
Fish and Aquatic Life
Impairments
Acute Aquatic Toxicity, Chronic Aquatic Toxicity
Current Use
FAL - Fish and Aquatic Life Community
Listing Status
303d Listed
Attainable Use
FAL - Fish and Aquatic Life Community
Priority
Low
Designated Use
FAL - Fish and Aquatic Life Community
303(d) ID
2018-014
Listing Date
4/1/2018
Impaired Water Notes
This water was assessed during the 2022 listing cycle; new chloride sample data exceed 2022 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
4/14/2021

Impaired Water Notes
This water was assessed during the 2018 listing cycle; new chloride sample data exceed 2018 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
6/30/2017

 
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Degraded Biological Community
Current Use
FAL - Fish and Aquatic Life Community
Listing Status
TMDL Approved
Attainable Use
FAL - Fish and Aquatic Life Community
Priority
Not Applicable
Designated Use
FAL - Fish and Aquatic Life Community
303(d) ID
2012-87
Listing Date
4/1/2012
Impaired Water Notes
This water was assessed during the 2022 listing cycle, and total phosphorus sample data exceed 2022 WisCALM listing criteria for the fish and aquatic life use.
Date
4/14/2021

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 2012 listing cycle, and total phosphorus sample data exceed 2012 WisCALM listing criteria for the fish and aquatic life use, while there was no biological data available regional biologists recommended this water be listed as impaired with total phosphorus as the pollutant.
Date
10/21/2011