Contact the Division of Air Pollution Control - Mobile Sources Section
Mailing Address: P.O. Box 1049, Columbus, OH 43216-1049
Street Address: 50 West Town Street, Suite 700 Columbus, OH 43215
Phone: 1-800-CAR-TEST or (614) 644-3059
E-mail Air Pollution Control ~ E-mail E-Check
Emergency Response Hotline (800) 282-9378