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Water Quality Divison > Programs > Storm Water > MS4 > Urbanized Areas

Urbanized Areas

The following maps are intended to provide a reference point for municipalities that may be affected by requirements in the MS4 general permit that apply to federally defined urbanized areas (UAs).

The maps are in PDF format Adobe Acrobat 5.0 PDF Document. The free Adobe Acrobat Reader is required to view these documents.

Because the maps are in PDF format, image quality remains high, even when zooming in on a particular area.

These maps were produced using U.S. Census 2010 data and were provided by the U.S. Environmental Protection Agency.


Fort Smith


Oklahoma City


State of Oklahoma