Wyoming regulates stormwater discharges to its municipal separate storm sewer system (MS4) under Code of Ordinances Chapter 68 (Stormwater). The city is a Phase II MS4 community under the federal Clean Water Act NPDES program, with permit issued by Michigan EGLE and a Storm Water Management Program coordinated through Public Works and the Lower Grand River Organization of Watersheds (LGROW). Stormwater leaving the city ultimately reaches Lake Michigan via Buck Creek and the Grand River.
Wyoming's stormwater regulation lives across three layers. Federally, the Clean Water Act NPDES program (33 U.S.C. Section 1342) requires regulated MS4s to obtain permits and implement the Six Minimum Control Measures: public education, public participation, illicit discharge detection and elimination, construction site runoff control, post-construction stormwater management, and pollution prevention/good housekeeping. At the state level, Part 31 of Michigan's Natural Resources and Environmental Protection Act (1994 PA 451, MCL 324.3101 to 324.3119) gives EGLE delegated authority over NPDES MS4 permits. Locally, Chapter 68 of the Wyoming Code of Ordinances (titled 'Stormwater') is the regulatory hook for illicit discharges, post-construction stormwater controls on new development, and connection to the city's Stormwater Standards Manual. Wyoming participates in LGROW (the Lower Grand River Organization of Watersheds), which coordinates Phase II MS4 compliance across Kent and Ottawa County communities. The city's primary receiving waters are Buck Creek (a 20.3-mile Grand River tributary that flows through Wyoming, Kentwood, and Grandville) and Plaster Creek; ultimate outfall is the Grand River and Lake Michigan. Wyoming's stormwater coordinator is Grant Simons, civil engineer (envsvcs@wyomingmi.gov, 616-261-3564). USGS gage 04119146 (Buck Creek at Wyoming, MI) tracks streamflow.
Chapter 68 violations - illicit non-stormwater discharges, failed BMPs, or development without an approved stormwater plan - are enforced through Wyoming's general municipal civil infraction schedule, plus stop-work orders and required remediation. EGLE can pursue state civil penalties under MCL 324.3115 of up to $25,000 per day of violation. Federal Clean Water Act civil penalties under 33 U.S.C. Section 1319 can reach roughly $66,000 per day per violation as inflation-adjusted.
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