Distribution Date:  July 29, 2025 

Sylvia Lake was treated with aquatic herbicide/algaecide on July 29,2025

Product(s) planned for use: Hydrothol 191

Active ingredient(s): DMA Endothall: 53.0%

Plants/Algae targeted: Plants and algae near the shoreline

Location of treatment(s): Alternating areas of the shoreline

The applicator will post signs in the treated and potentially affected areas no more than 48 hours prior to treatment. The signs will describe any water use restrictions or advisories. No swimming restrictions

If you want additional notification prior to treatment, or have further questions, please contact:  Northwest Lake Cleaning LLC (425-941-8083) 

This herbicide treatment is regulated under a permit issued by the Washington State Department of Ecology.  Permit No. WAG994004 

Scan with QR reader to go to permit web page