US lawMinnesotaRegulationsDEPARTMENT OF HEALTH ANDChapter 9400 — CHAPTER 9400, WATER TREATMENT CERTIFICATION9400.0200Minn. R. 9400.0200SCOPELast amended: 1996Year: 2026Length: 25 wordsOfficial source This chapter establishes the requirements for: A. individuals to be certified as water or wastewater treatment operators; and B. the classification of systems and facilities.PreviousMinn. R. 9400.0100NextMinn. R. 9400.0350