Adams, Marquette County, Wisconsin
UF14
175700
881.61
Water is impaired due to one or more pollutants and associated quality impacts.
Notes
Mason Lake was originally listed in 2002 due to eutrophicaton and elevated pH impairments of the fish and aquatic life use caused by total phosphorus.
Evaluations every two-year cycle from 2012 to 2024 confirmed elevated phosphorus and algal levels. This water is covered by the Upper Fox & Wolf River Basins TMDL, approved by the US EPA on February 27, 2020Pollutant
Total Phosphorus
Listed For
Recreation
Impairments
Excess Algal Growth, Elevated pH , Eutrophication
Current Use
Restricted Recreation
Listing Status
TMDL Approved
Attainable Use
Recreation
Priority
Not Applicable
Designated Use
Recreation
303(d) ID
603
Listing Date
4/1/2002
Impaired Water Notes
This water was assessed during the 2018 listing cycle; total phosphorus and chlorophyll sample data exceeded 2018 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use.
Date
7/10/2017
Impaired Water Notes
Mason Lake was also indicated as "eutrophic" based on the 2010 Lakes Assessment methodology.
Date
3/19/2010
Impaired Water Notes
Originally listed for violations of pH water quality standards, eutrophication
from nutrients, algae blooms from nonpoint sources.
Mason Lake has been monitored as an ambient lake since 1986. Water quality monitoring during this time has found pH at or above 9.0 on five occasions. These elevated pH levels have been documented in 1986, 1992 and 1997 and include both field and laboratory pH readings.
Mason Lake should be added to the 303d impaired waters list due to frequent pH exceedances and eutrophication.
Date
3/19/2002
Impaired Water Notes
Mason Lake was originally listed in 2002 due to eutrophicaton and elevated pH impairments of the fish and aquatic life use caused by total phosphorus.
This water was assessed during the 2012 listing cycle, and total phosphorus and chlorophyll sample data exceed 2012 WisCALM listing thresholds for the recreation use.
Date
6/17/2011
Impaired Water Notes
This water was assessed during the 2014 listing cycle; total phosphorus and chlorophyll sample data exceed 2014 WisCALM listing thresholds for the Recreation use. Total phosphorus and chlorophyll data do not exceed Fish and Aquatic Life thresholds.
Date
2/28/2014
Impaired Water Notes
This water was assessed during the 2016 listing cycle; total phosphorus sample data overwhelmingly exceed 2016 WisCALM listing thresholds for the Recreation use, and chlorophyll data exceed REC thresholds. Total phosphorus and chlorophyll data do not exceed Fish and Aquatic Life thresholds.
Date
10/12/2015
Impaired Water Notes
This water was assessed during the 2020 listing cycle; total phosphorus sample data overwhelmingly exceeded 2020 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use, and chlorophyll data also exceeded REC and FAL thresholds. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
6/19/2019
Impaired Water Notes
This water is covered by the Upper Fox & Wolf River Basins TMDL, approved by the US EPA on February 27, 2020
Date
3/3/2020
Impaired Water Notes
This water was assessed during the 2022 listing cycle; total phosphorus sample data overwhelmingly exceeded 2022 WisCALM listing thresholds for the Recreation use and Fish and Aquatic Life use, and chlorophyll data also exceeded REC and FAL thresholds. Based on the most updated information, no change in existing impaired waters listing is needed.
Date
5/26/2021