Stormwater runoff contains pollutants that can harm human health, degrade water quality and aquatic habitat, and impair ecosystem functions. Pollutants are conveyed though the County’s MS4 to streams, lakes, and other receiving water bodies. Fayette County has jurisdiction over MS4s that are owned and maintained by Fayette County and are not part of a combined sewer or part of a publicly owned treatment works.
The pollutants of greatest concern in Fayette County are sediment, nutrients, and fecal coliform bacteria. Sediment from inadequate erosion control practices at construction sites often ends up in streams causing excessive channel erosion and impacts to fish communities. Runoff from fertilized lawns contributes excess nutrients to water bodies which can lead to algal blooms an in extreme cases fish kill events due to low dissolved oxygen levels. Elevated fecal coliform levels impair water quality and can lead to restrictions on the use and enjoyment of natural resources such as swimming areas.
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