How do I obtain an aquatic herbicide permit for weeds and algae?
To apply an aquatic herbicide in the Fox River or Chain O’Lakes waterway you must obtain a Letter of Permission (LOP) from the Illinois Department of Natural Resources (IDNR) and have the treatment applied by a licensed applicator.
Applications must be submitted to the Illinois Department of Natural Resources.
Key Requirements and Process:
- Permit Type: A Letter of Permission (LOP) is required for both chemical and non-chemical (mechanical cutting) treatment, as per 17 Ill. Adm. Code Part 895.
- Application Submission: Complete the official IDNR Application for a Letter of Permission, which should be returned to the Division of Fisheries, 8916 Wilmot Road, Spring Grove, IL 60081.
- Licensed Applicator: All chemical treatments must be completed by a licensed applicator.
- Regulations: The treatment must use USEPA-approved/registered aquatic herbicides.
Please note the Fox Waterway Agency does not issue this permit. You must contact the Illinois Department of Natural Resources.
