Impaired Water - Irish Creek (Irish Creek)
Dodge County, Wisconsin
UR13
861600
0.00 - 3.79
3.79
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Irish Creek is on the 303(d) list for acute aquatic toxicity caused by unionized ammonia. The creek also suffers from degraded habitat caused by total suspended solids and total phosphorus.
This water was assessed during the 2014 listing cycle; phosphorus sample data nearly met (May Meet) 2014 WisCALM listing thresholds for the Fish and Aquatic Life use and biological sample data, macroinvertebrate or fish Index of Biotic Integrity (IBI), scores indicate impairment. Further monitoring is recommended.

This water was assessed during the 2018 listing cycle; new total phosphorus sample data may meet 2018 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).
Listing Details
Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Degraded Habitat
Current Use
Coldwater - stocked, reproduction
Listing Status
TMDL Approved
Attainable Use
Coldwater - stocked, reproduction
Priority
Not Applicable
Designated Use
Coldwater - stocked, reproduction
303(d) ID
195
Listing Date
4/1/2006
Impaired Water Notes
Irish Creek (861600, miles 0-3.79) is a part of the Rock River Basin and is listed as impaired for total phosphorus and sediment/total suspended solids. The Rock River Basin TMDLs for phosphorus and sediment were approved by the USEPA September 28, 2011.
Date
5/8/2012

 
Pollutant
Ammonia (Unionized) - Toxin
Listed For
Fish and Aquatic Life
Impairments
Acute Aquatic Toxicity
Current Use
Coldwater - stocked, reproduction
Listing Status
303d Listed
Attainable Use
Coldwater - stocked, reproduction
Priority
Low
Designated Use
Coldwater - stocked, reproduction
303(d) ID
195
Listing Date
4/1/2006
 
Pollutant
Sediment/Total Suspended Solids
Listed For
Fish and Aquatic Life
Impairments
Degraded Habitat
Current Use
Coldwater - stocked, reproduction
Listing Status
TMDL Approved
Attainable Use
Coldwater - stocked, reproduction
Priority
Not Applicable
Designated Use
Coldwater - stocked, reproduction
303(d) ID
195
Listing Date
4/1/1998
Impaired Water Notes
Irish Creek (861600, miles 0-3.79) is a part of the Rock River Basin and is listed as impaired for total phosphorus and sediment/total suspended solids. The Rock River Basin TMDLs for phosphorus and sediment were approved by the USEPA September 28, 2011.
Date
5/8/2012