La Crosse, Trempealeau County, Wisconsin
BL03, BL04, BR01, BT01
721000
693.70 - 714.20
20.50
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This segment of the Mississippi River is on the 303d list for PCBs and Mercury in fish tissue and the water column.
This portion of the Mississippi River was evaluated for phosphorus from 2012 to 2020 and values were found to be too high. In the 2024 cycle excess algal growth impairment was identifiedPollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Impairment Unknown, Excess Algal Growth
Current Use
Unsupported Aquatic Life
Listing Status
303d Listed
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Low
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
2012-2014
Listing Date
4/1/2012
Impaired Water Notes
This stream segment was assessed during the 2012 listing cycle, and total phosphorus sample data exceed criteria for the fish and aquatic life use
Date
3/1/2013
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
10/7/2015
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
4/13/2017
Impaired Water Notes
This water was assessed during the 2020 listing cycle; new total phosphorus sample data exceed 2020 WisCALM listing criteria for the 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
8/8/2019
Pollutant
PCBs
Listed For
Wildlife
Impairments
PCBs Contaminated Fish Tissue, Impairment Unknown
Current Use
Restricted Wildlife Use
Listing Status
303d Listed
Attainable Use
Wildlife Use
Priority
Low
Designated Use
Wildlife Use
303(d) ID
591
Listing Date
4/1/1998
Impaired Water Notes
Specific advisory for PCBs in fish.
Date
4/1/2006
Pollutant
Mercury
Listed For
Wildlife
Impairments
Acute Aquatic Toxicity, Mercury Contaminated Fish Tissue, Impairment Unknown, Elevated Human Health Risks - Toxics
Current Use
Restricted Wildlife Use
Listing Status
303d Listed
Attainable Use
Wildlife Use
Priority
Low
Designated Use
Wildlife Use
303(d) ID
530
Listing Date
4/1/1998
Impaired Water Notes
This portion of the Mississippi River was assessed during the 2020 listing cycle; new mercury data showed continued exceedance of Wildlife use criteria.
Date
8/8/2019