The Illinois Department of Agriculture is responsible for pesticide testing and licensing incuding answers to questions regarding required exams, category requirements, and license availability.
Phone: 800-641-3934
Springfield Office
IDA/Bureau of Environmental Programs
P.O. Box 19281
State Fairgrounds
801 E. Sangamon Ave.
Springfield, IL 62794-9281
217-785-2427 (TDD)
Dekalb Office
IDA/Bureau of Environmental Programs
2280 Bethany Rd. Suite B
Dekalb, IL 60115-5305
815-787-5476