Impaired Water - Underwood Creek (Underwood Creek)
Milwaukee County, Wisconsin
MI03
16700
0.00 - 2.84
2.84
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This water was listed in 2010 based on fecal coliform and recreational restrictions.

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, and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).

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 and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).

This water was assessed during the 2016 listing cycle; temperature data exceeded 2016 WisCALM listing thresholds for the Fish and Aquatic Life use. Total phosphorus sample data clearly met 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).
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. New total phosphorus sample data assessed may met 2018 WisCALM listing criteria for the Fish and Aquatic Life use, however, biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category). Existing temperature data confirmed the 2016 listing for this water.

Assessments of new total phosphorus data during the 2020 listing cycle showed conditions unclear for healthy aquatic communities like plants, fish, and bugs. New fish sample data were in good condition.
Listing Details
Pollutant
Chloride
Listed For
Fish and Aquatic Life
Impairments
Chronic Aquatic Toxicity, Acute 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
2018-013
Listing Date
4/1/2018
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
Unknown Pollutant
Listed For
Fish and Aquatic Life
Impairments
Degraded Biological Community, Elevated Water Temperature
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
2016-286
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

 
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Degraded Biological Community
Current Use
FAL - Fish and Aquatic Life Community
Listing Status
Pollutant Removed
Attainable Use
FAL - Fish and Aquatic Life Community
Priority
Delisted 2016
Designated Use
FAL - Fish and Aquatic Life Community
303(d) ID
2012-85
Listing Date
4/1/2012
Impaired Water Notes
Based on the total phosphorus criteria excursions and the corroborating biological assessment, degraded biological community impairment was added to the existing impaired water listing in 2012. 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, and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category). List in 2010 based on fecal coliform and recreational restrictions.
Date
8/30/2011

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 and biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
2/26/2014

Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data clearly met 2016 WisCALM listing criteria for the Fish and Aquatic Life use, however, biological impairment was observed (i.e. at least one macroinvertebrate or fish Index of Biotic Integrity (IBI) scored in the poor condition category).
Date
8/30/2015

 
Pollutant
Fecal Coliform
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
2010-41
Listing Date
4/1/2010
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
Underwood Creek has been extensively modified, has concrete lining and drop structures and experiences flashy flow conditions. At modeled assessment points in Underwood Creek, based on monitoring data, fecal coliform counts exceed 400 cfu/100 ml 39% of time MN-13; 29% at MN-14 annually and 23% and 14% of time from May-September (which exceed WisCALM listing thresholds). 75% of the Fecal Coliform urban nonpoint loads cannot be explained but they could be caused by illicit connections or leaky sewers. Fecal coliform loadings from Underwood Creek contribute to high fecal coliform levels in the Menomonee River Watershed.
Date
3/23/2010