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Deep Creek Lake: Hydrilla Treatment

August 16

Hydrilla Treatment

Hydrilla is a fast-growing aquatic invasive plant that scientists first found in Deep Creek Lake in 2013 and have been treating with a herbicide annually since 2014. The herbicide treatment takes place each summer and is again planned for the summer of 2021. Please visit the Deep Creek Lake Natural Resource Management Area website for an overview of treatment locations and plans, including other information related to the treatment process.

People in the affected areas are asked to stay clear of the treatment boat while it is underway so that the proper dosage of herbicide can be administered. Once applied, there are no recreational restrictions associated with the herbicide. Hydrilla control contractors will follow COVID 19 guidelines issued by the state at the time of treatment, such as social distancing and using PPEs where necessary.

The 2021 planned herbicide treatment dates are as follows:

Monday, June 7 — First hydrilla treatment
Tuesday, June 29 — Second hydrilla treatment
Tuesday, July 20 — Third hydrilla treatment
Monday, August 16 — Fourth hydrilla treatment

The above dates are weather-dependent. Any updates or changes to the dates will go out via the department’s automated email system. If you were forwarded this email and would like to sign up to receive updates via the e-mail distribution list, please register on the DNR website.

Any questions concerning the hydrilla control program can be addressed to Mark Lewandowski at mark.lewandowski@maryland.gov.

A map showing the treatment locations as red polygons can be seen below.

Hydrilla Treatment location


August 16
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