CONTACT US
WSLH Proficiency Testing
Mail: 2601 Agriculture Drive, Room233, Madison, WI 53718
Phone: (800) 462-5261
Fax: (608) 265-1111
Email: ptservice@slh.wisc.edu
Office hours: Monday through Friday 8:00 AM to 4:30 PM (CT) – closed on all major holidays
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