Impaired Water - Interfalls Lake (Pattison Beach (State Park))
Douglas County, Wisconsin
LS02
2838000
0.00 - 0.07
0.07
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
This beach appears to have intermittent issues with E. coli levels. This water was delisted in 2006, relisted in 2008, delisted again in 2010, and is proposed for the 2016 list.
This beach was assessed for the 2014 Impaired Waters List and E. coli data did not exceed 2014 WisCALM listing criteria.
This beach was assessed for the 2016 Impaired Waters List and E. coli data exceeded 2016 WisCALM listing criteria indicating Recreational Use impairment.

This beach was assessed during the 2018 listing cycle; E. coli sample data were clearly below 2018 WisCALM listing thresholds for the Recreation use.
Reports and Documents
Water Evaluation Section
Listing Details
Pollutant
E. coli
Listed For
Recreation
Impairments
Recreational Restrictions - Pathogens
Current Use
Restricted Recreation
Listing Status
303d Listed
Attainable Use
Full Body Contact - Swimming, Boating
Priority
Low
Designated Use
Full Body Contact - Swimming, Boating
303(d) ID
2016-270
Listing Date
4/1/2016
Impaired Water Notes
Propose to Delist in 2010. Geomean calculated for data 2004-2009. Data was evaluated for Interfalls Lake based on 2007-2009 data. There were no exceedances of the geomean of 126 cfu/100mL in 115 samples during this time period.
Date
10/6/2009

Impaired Water Notes
Delisted in 2006 but RESLISTED in 2008.
Date
4/1/2008

Impaired Water Notes
This beach was assessed for the 2016 Impaired Waters List and E. coli data exceeded 2016 WisCALM listing criteria indicating Recreational Use impairment. This water will be relisted for E. coli.
Date
9/2/2015