The Office of Indiana State Chemist is temporarily located in AGAD, Room 18 (basement).
Visitor paid parking is available in the Harrison Street Garage.
Our mailing address remains the same (175 S. University Street, West Lafayette, IN 47907-2063).
Pesticide Section - Clean Sweep
OISC is planning another series of Clean Sweep waste pesticide collection days for August 2025!
Please download this form and open within Adobe Acrobat to submit it properly.
If you have specific questions or wish to speak directly to the OISC Clean Sweep Coordinator, please contact: cleansweep@groups.purdue.edu. Thank you for your interest in the safe and legal disposal of waste pesticides.