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Celebrating 150 Years in Garrett County, Maryland: 1872-2022

Maryland Department of Natural Resources Releases 2018 Zebra Mussel Report

Last Updated on May 8, 2019 at 10:01am | Watershed Management
The Maryland Department of Natural Resources has released the Pilot Zebra Mussel Monitoring in Deep Creek Lake: 2018 Summary of Findings.  The pilot project, led by the Maryland Department of Natiural Resources, was partially funded by Brookfield Renewable and The Deep Creek Watershed Foundation, Inc.
Results of the 2018 effort found the following:
• Temperature, conductivity, dissolved oxygen and pH are within or near the preferred zebra mussel habitat range in the lake.
• Overall, Deep Creek Lake is thought to be at low risk for zebra mussel colonization due to low calcium and water hardness concentrations in the lake, as these factors are important for zebra mussel growth, reproduction and survival.
• No zebra mussels were found in the lake, at any location, during any of the 2018 visual surveys suggesting the species is not currently present in Deep Creek Lake.
• The 2018 monitoring effort should be continued in 2019 and 2020 to account for inter- annual variability in temperature and precipitation, which can affect water quality.
• Visual surveys should continue at a similar frequency, as in 2018, to ensure that no populations of zebra mussels exist in Deep Creek Lake.
• Additional monitoring, such as random dock surveys, as well as eDNA studies should be considered if determined to be appropriate and resource feasible.
The full report is available here: