Stormwater Management

About Stormwater

When it rains in Rock Island County, stormwater runoff picks up materials from our streets, farms, parking lots and yards. Sources of pollution include cars, improper storage of materials, litter in driveways or streets, and erosion at construction sites. The water runoff carries all kinds of substances, some of them are harmful.

February 19th, 2008 Rock Island County adopted a stormwater ordinance (PDF) very similar to the other Cities within Rock Island County. Since then there have been minor amendments.

These efforts will help the County develop controls and a plan to prevent problems before they occur.

The Clean Water Act Amendments of 1987 established the National Pollutant Discharge Elimination System (NPDES) stormwater program. The Act called for implementation in two phases; Phase I addressed the most significant sources of pollution in stormwater runoff. Phase II addresses other sources to protect water quality. The Phase II regulations were published in the December 8, 1999 Federal Register (PDF).

Phase I of the NPDES Storm Water program began in 1990 and required medium and large municipal separate storm sewer systems (MS4s) to obtain NPDES coverage. The expanded Phase II program began March 2003 and required small MS4s in urbanized areas to obtain NPDES permits and implement six minimum control measures. An urbanized area as delineated by the Bureau of Census is defined as a central place or places and the adjacent densely settled surrounding area that together have a residential population of at least 50,000 people and an overall population density of at least 500 people per square miles.

View All

Please remember that all of the Questions and Answers only apply to properties in Unincorporated Rock Island County. If you live in a city or village, please check with their Stormwater Department for their rules and regulations.