Impaired Water - Alto Creek (Alto Creek)
Dodge County, Wisconsin
UR03
835900
0.00 - 6.15
6.15
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
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.

This water was assessed during the 2018 listing cycle; new total phosphorus sample data may exceed 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
Sediment/Total Suspended Solids
Listed For
Fish and Aquatic Life
Impairments
Low flow alterations, Degraded Habitat
Current Use
LFF - Limited Forage Fishery
Listing Status
TMDL Approved
Attainable Use
Coldwater - stocked, reproduction
Priority
Not Applicable
Designated Use
Coldwater - stocked, reproduction
303(d) ID
6
Listing Date
4/1/1998
Impaired Water Notes
Added low flow alterations based on new data.

Type of impairment : Degraded habitat and Low flow alterations.
Pollutants: Sediment, Streambank erosion/stability

Source of impairment (e.g. point source, nonpoint source, internal load, unknown, etc.):Non-point

Fish Assessment, 9/15/2000, IBI Score = 29 (poor), 99% of fish sampled were forage fish tolerant of low dissolved oxygen.
Habitat Assessment, 7/18/2000, Qualitative Habitat Rating = 70 (good), high percent silt and sediment.
Date
4/1/2008

Impaired Water Notes
Alto Creek (835900, miles 0-6.15) is a part of the Rock River Basin and is listed as impaired for 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