Hydrothol 191 will be applied under permit #WAG994004 by Northwest Lake Cleaning LLC (425-941-8083) to Sylvia Lake waters on 6/2/25 to control weeds and algae growth.
- NO SWIMMING in the treated area for 24 hours due to possible eye irritation.
- NO PETS or animals in the water for 24 hours
Please note: This is a summary of the public notice provided by the vendor listed above.
