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Wisconsin 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. March 4, 2026 ~ Chippewa Falls – Lake Hallie Municipal Building, 13136 30th Ave, Chippewa Falls, WI, 54729 ... OTM/NN Exam Review (4 OTM/NN Credits)
