Impaired Water - Unnamed (Butler Ditch)
Waukesha County, Wisconsin
MI03
18100
0.00 - 2.85
2.85
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Butler Ditch was identified as impaired for Recreation Restrictions due to pathogens (Fecal coliform) in 2010; the restoration plan (TMDL) was approved by the EPA in 2018. An additional impairment for Chronic Aquatic Toxicity due to Chloride was identified in 2020. This impairment was confirmed with new data in the 2022 cycle. This stream is on the Impaired Waters List.

Butler Ditch was evaluated every two-year cycle from 2018 to 2022; phosphorus and fish data indicated good conditions.
Listing Details
Pollutant
Chloride
Listed For
Fish and Aquatic Life
Impairments
Chronic Aquatic Toxicity
Current Use
FAL - Fish and Aquatic Life Community
Listing Status
303d Listed
Attainable Use
LFF - Limited Forage Fishery
Priority
Low
Designated Use
LFF - Limited Forage Fishery
303(d) ID
2020-057
Listing Date
4/1/2020
Impaired Water Notes
This water was assessed during the 2022 listing cycle; chloride sample data exceed 2022 WisCALM listing criteria for the Fish and Aquatic Life use. Based on the new data no change in listing is needed.
Date
4/9/2021

Impaired Water Notes
This water was assessed during the 2020 listing cycle; chloride sample data exceed 2020 WisCALM listing criteria for the Fish and Aquatic Life use.
Date
7/1/2019

 
Pollutant
Fecal Coliform
Listed For
Recreation
Impairments
Recreational Restrictions - Pathogens
Current Use
Restricted Recreation
Listing Status
TMDL Approved
Attainable Use
Full Body Contact - Swimming, Boating
Priority
Not Applicable
Designated Use
Full Body Contact - Swimming, Boating
303(d) ID
2010-20
Listing Date
4/1/2010
Impaired Water Notes
The Milwaukee River Watershed TMDL was approved by the EPA on March 9, 2018 and covers waters in the basin impaired for Total Phosphorus, Sediment/Total Suspended Solids, and bacteria (E. coli and Fecal Coliform).
Date
3/9/2018

Impaired Water Notes
Butler Ditch is in the Menomonee River Watershed and has been assessed by monitoring and modeling work. The information summarized from this report notes fecal coliform exceedances are poor on an annual basis and considered poor through the swimming season. Fecal coliform concentrations exceed 400 cfu/100 ml 36% of time on annual basis and 21 % seasonally which exceed the 10% threshold needed for listing. It is a variance water (dst from Honey Creek). Fecal coliform loads to this watershed are considered significant and are a concern when addressing Fecal Coliform in the Menomonee River Watershed.
http://www.swwtwater.org/home/documents.cfm Menomonee River Watershed Chapter 4
Date
10/23/2009