Portage, Wood County, Wisconsin
CW11
1398600
16.01 - 32.82
16.81
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This portion of Mill Creek was listed for phosphorus and low dissolved oxygen in the 1998 cycle. Evaluation in the 2022 and 2024 cycles confirmed the phosphorus listing. This water is part of the Wisconsin River TMDL, approved in 2019.Pollutant
Total Phosphorus
Listed For
Fish and Aquatic Life
Impairments
Low DO
Current Use
Unsupported Aquatic Life
Listing Status
TMDL Approved
Attainable Use
WWSF - Warmwater Sport Fishery
Priority
Not Applicable
Designated Use
WWSF - Warmwater Sport Fishery
303(d) ID
285
Listing Date
4/1/1998
Impaired Water Notes
Synoptic surveys completed in the winter of 2000 documented dissolved oxygen concentrations below 5 mg/l at several sites in the WWSF reach. Dissolved oxygen concentrations did not fall below 5 mg/l at CTH P, the furthest downstream road crossing.
Continuous dissolved oxygen monitoring conducted in the winter of 2001 documented dissolved oxygen concentrations below 5 mg/l at sites in the WWSF reach.
Date
3/20/2002
Impaired Water Notes
This water is part of the 2019 approved Wisconsin River TMDL addressing Total Phosphorus and Total Suspended Solids.
Date
6/6/2019
Impaired Water Notes
This water was assessed during the 2022 listing cycle; new total phosphorus sample data overwhelmingly exceed 2022 WisCALM listing thresholds for the Fish and Aquatic Life use. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
5/21/2021