Impaired Water - Otter Creek (Otter Creek)
Iowa County, Wisconsin
LW11
1237100
21.37 - 23.30
1.93
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This segment of Otter Creek was put on the Impaired Waters List in the 1998 cycle for sediment and degraded habitat. The TMDL for sediment was approved in 2008. This water is on the In-Restoration Waters List.

Evaluations of bug and fish communities in the 2020 and 2022 cycles showed fair to good health.
Listing Details
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
331
Listing Date
4/1/1998
Impaired Water Notes
Impoundment Blackhawk Lake -Organic loading from algal blooms and/or night time periphyton respiration. High ammonia in the stream below the dam. Agricultural non-point sediment loading.
Date
10/22/2009

Impaired Water Notes
The sediment TMDL for Otter Creek was approved by the USEPA October 2, 2008.
Date
10/2/2008