OTM/NN Exam Review (4 OTM/NN Credits)
DNR Service Center (Spooner) 810 W. Maple Street, Spooner, WI, United StatesWisconsin Rural Water Association Presents OTM/NN Water System Operator Certification Exam Review (4 OTM/NN Credits) The room will open at 7:30 am with the class starting PROMPTLY at 8:00 am. The class will end at 12:00 pm. February 10, 2026 ~ Spooner – DNR Service Center 810 W. Maple St, Spooner, WI, 54810 March 4, ... OTM/NN Exam Review (4 OTM/NN Credits)
