County Stormwater Management Program

What is stormwater?

Stormwater is water from rain or melting snow that doesn't soak into the ground but runs off across the ground surface and into waterways.  It flows from rooftops, over paved surfaces and bare soil, and through sloped lawns while picking up a variety of materials and pollutants on its way.  The quality of runoff is affected by a variety of factors and depends on the season and upon activities which lie in the path of the flow.

Why is stormwater a problem?

As it flows across the ground surface, stormwater runoff collects pollutants and transports these pollutants to surface waters.  Although the amount of pollutants from a single residential property, a single commercial / industrial site, or a small construction activity may seem unimportant, the combined concentrations of contaminants from all of these sources threaten our lakes, rivers, wetlands, and other water bodies.  Pollution conveyed by stormwater degrades the quality of drinking water, damages fisheries, and impairs the habitat of plants and animals that depend on clean water for survival.  Pollutants carried by stormwater can also affect recreational uses of water bodies by making them unsafe for wading, swimming, boating and fishing.

What are examples of stormwater pollution?

There are many examples of stormwater pollution around us every day that we might not recognize as hazardous to our surface waters.  Some of these sources of pollution include:

  • Nutrients found in fertilizers, such as phosphorus and nitrogen, can lead to overgrowth of algae.  Too much algae growth can deplete the oxygen in surface waters, which can be harmful to other aquatic life.
  • Oil and grease from automobiles cause sheen and odor in surface waters, which makes transfer of oxygen difficult for aquatic life.
  • Sediment from earth disturbance and construction activities can cloud surface waters and interfere with natural habitats of living things that depend on those waters.
  • Bacteria from animal wastes and illicit connections to drainage systems can make nearby surface waters unsafe for wading, swimming and propagation of edible fish.
  • Careless applications of pesticides and herbicides contribute dangerous chemicals into surface waters which cause ecosystem imbalances and affect the health of living organisms.
  • Even litter can damage aquatic life by introducing chemical pollution and destroying the beauty of our waterways.

How is Broome County involved in controlling stormwater pollution?

The urbanized center of Broome County is within a designated MS4 area.  MS4 stands for "Municipal Separate Storm Sewer Systems", and any MS4 designated urban area within the United States is regulated under federal law commonly known as EPA's Phase II Stormwater Rule.  This regulation is part of the Clean Water Act.

As a designated MS4, Broome County is required to develop and implement a Stormwater Management Program (SWMP) which addresses certain minimum criteria measures related to stormwater protection and public education.  A copy of the County's SWMP can be viewed through the link at the bottom of the page under "Other Resources".

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What is IDDE?

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IDDE Public Reporting Form


What can you do to help protect local waters from stormwater pollution?

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Other Resources