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

2020 Hydrilla Treatment Dates

Last Updated on May 15, 2020 at 11:26am | Watershed Management
The 2020 planned herbicide treatment dates are as follows:

June 8 – first hydrilla treatment  
June 30 – second hydrilla treatment
July 21 –  third hydrilla treatment
August 18 – fourth hydrilla treatment
The above dates are weather-dependent.
Any questions concerning the hydrilla control program can be addressed to Mark Lewandowski at

Below is a map showing the treatment locations (red outlines):