
Stormwater
NPDES Stormwater Discharge Regulatory Requirements for Public School Districts
The 1988 amendments to the Federal Clean Water Act required the USEPA to develop and enforce regulations to address pollutants discharged from “Non-Point Sources.” These regulations, known as the National Pollutant Discharge Elimination System (NPDES), regulate stormwater discharges from specific entities.
Phase I became effective on April 1, 1993, and regulated only large municipalities with a population of over 1,000,000 people. Phase II became effective on April 1, 2003, and incorporated these requirements for both municipal and other public organizations, including public school districts, located within urbanized areas of more than 100,000 people.
Urbanized areas are defined as a land area comprising one or more places and the adjacent densely populated surrounding areas that have a residential population of at least 50,000 and an overall population density of at least 1,000 people per square mile.
The basin unit for delineating the Urbanized Area (UA) boundaries is the census block. Census blocks are based on physical boundaries such as a city block or political boundaries. Urbanized areas can be comprised of large areas such as counties and Indian reservations or smaller civil divisions (i.e. towns or townships). The current Urbanized Areas are determined based on the 2000 Census.
The State of Michigan has identified the following areas as meeting these requirements: Ann Arbor. Battle Creek, Bay City . Benton Harbor, St. Joseph, Detroit, Elkhart, Indiana - Michigan, Flint , Grand Rapids, Holland , Jackson, Kalamazoo, Lansing, Michigan City, Indiana - Michigan, Monroe, Muskegon, Port Huron, Saginaw, South Lyon, Howell, Brighton, South Bend, Indiana - Michigan, Toledo, Ohio - Michigan.
Above information courtesy of the following: NPDES Stormwater Discharge Regulatory Requirements for Public School Districts March 2012


