Illicit Discharge Detection and Elimination (IDDE):
A program whose purpose is to find, fix and prevent illicit discharges through a series of techniques and awareness campaigns.
Low Impact Development (LID):
Techniques and design considerations that help manage the rainwater that falls on your property by allowing some to evaporate back into the air, some to absorb into the ground, some to be captured and used later as needed, and the rest to slowly pass into the stormwater system and into nearby streams. Learn about low impact development techniques in Bothell.
Municipal Separate Storm Sewer System (MS4):
A storm system that flows through its own set of pipes rather than being combined with the sewer system. Bothell has its own storm system which does not receive treatment before it discharges into streams, lakes, and rivers.
National Pollutant Discharge Elimination System (NPDES):
A permit program, created in 1972 by the Clean Water Act (CWA), that helps address water pollution by regulating point sources that discharge pollutants to waters of the United States. Learn more about the NPDES permit program.
Water from rainfall that flows into surface water including drainage facilities, rivers, streams, lakes, or Puget Sound.
A person who designs solutions for problems created by surface water runoff and pollution.
Anything in our stormwater that makes it unclean.
Rain that falls on streets, parking areas,
sports fields, gravel lots, lawns, rooftops
or other developed land and flows directly
into nearby creeks, lakes, rivers, and Puget
Sound. This runoff carries pollutants to
Water found above the land, including
oceans, estuaries, lakes, rivers, streams,
The entire land area from which water drains into a particular surface water body such as a lake, stream, or river. Learn more about watersheds.