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University of Wisconsin Crest

WSLH Proficiency Testing

Wisconsin State Laboratory of Hygiene

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Office Hours

Monday through Friday
8:00AM to 4:30PM (CT-Chicago)
Closed on all major holidays

Direct Contact

Phone: (800) 462-5261

Mailing Address

WSLH Proficiency Testing
2601 Agriculture Drive 
Room 233
Madison, WI 53718

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