The National Center for Water Quality Research operates all year. Our staff members are available to answer your questions pertaining to water quality and sample collection and processing.
Monday – Friday – 8:00 am to 4:30 pm (Eastern time)
(Note: We are closed on major holidays, the day after Thanksgiving, and December 24-January 2.)
419-448-2198 or 800-925-9250 Ext. 2198
National Center for Water Quality Research
310 E. Market St.
Tiffin, Ohio 44883
419-448-2345 (Attn: NCWQR)