Drainage System / NPDES
National Discharge Elimination System (NPDES) Boundary
Flood Zone, designated by the Federal Emergency Management Administration (FEMA)
Drainage Site Inspection
Drainage System Outfall
Drop Inlet or Catch Basin
Man Hole, Junction Box, or Other Drainage System Access Point
Creek, River, or Naturally-Occurring Stream
Ditch or Other Open Channel
Below-Ground Drainage Conduit
Alternate Views of the Map
The above map displays municipal storm drainage systems that fall within the NPDES priority mapping boundaries, as well as related features, such as streams, conduits, inlets, outfalls, and water quality testing points.
The National Pollutant Discharge Elimination System (NPDES) refers to the network of municipal storm drainage systems that carry storm water away from our streets and into local streams. State and Federal laws require that local municipalities map these systems, such that pollutants detected in local streams can be traced to potential sources. The pink shaded areas represent the regions where NPDES mapping is required.
This map is intended to show the destination of storm water. Mapping is not complete in all areas and may contain inaccuracies. This information should never be used to make parcel-specific decisions or replace a field survey. Also note that the County only maps areas that are within its jurisdiction.
The data layers used on this map can be downloaded and imported into various GIS applications. Data files are in compressed ("zipped") shapefile format.
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