Skip common site navigation and headers
United States Environmental Protection Agency
National Pollutant Discharge Elimination System (NPDES)
Begin Hierarchical Links EPA Home > OW Home > OWM Home > NPDES Home > Stormwater > Urbanized Area Maps End Hierarchical Links
Basic Information
 
Municipal MS4s
 
Construction Activities
- Construction General Permit eNOI
 
Industrial Activities
- Multi-Sector General Permit eNOI
 
Road-Related MS4s
 
Menu of BMPs
 
Green Infrastructure
 
Integrated Municipal Plans
 
 
 
Stormwater Home

 

NPDES Topics Alphabetical Index Glossary About NPDES

Urbanized Area Maps

2010 Urbanized Areas

According to the 1999 Phase II Stormwater Rule, the universe of the regulated small MS4 program expands every ten years based on the decennial Census definition of urbanized area.

The U.S. Census Bureau recently completed the maps of 2010 urbanized areas. These maps can be used to assist authorized states (and EPA Regional Offices for unauthorized states) as they determine which new MS4s are located in the 2010 urbanized area and would require coverage (PDF) (4 pp, 247K) by an MS4s permit. Municipalities can also use these maps to determine which parts of their jurisdiction are located in the 2010 urbanized area where the MS4 program would apply. Interested parties can now access regional PDF maps that depict urbanized areas across the United States. The maps are organized by the name of the urbanized area. Within each urbanized area folder is a series of PDFs that depict the urbanized area. The first PDF contains a reference map and additional detailed maps, while the remaining PDFs are individual copies of the detailed maps contained in the first file (note: smaller urbanized areas may contain only one map). The reference maps can be accessed from the following link:

Census 2010 Urban Area Reference Maps

Please note: The urbanized area and urban cluster are both outlined in green on the reference maps, so it's difficult to distinguish them, however the urbanized areas are labeled in regular font and the urban clusters are slightly italicized. EPA’s small MS4 program applies in the urbanized areas.

The Census Bureau also provides a series of files relating the 2010 urban areas to counties, incorporated places, and zip codes to help identify the correct urban area.

The original GIS shapefiles used to generate the maps can be downloaded from the Census 2010 Urban Area website under “boundaries and shapefiles.”

2000 Urbanized Areas

EPA developed a set of digitized maps for each urbanized area (PDF) (3 pp, 264K) as defined by the 2000 US Census. While these old 2000 maps have been superseded by the new 2010 Census data, they are still available upon request. To obtain copies of these maps please send an email to npdesbox-request@epa.gov and include the state and urbanized area that you are requesting.

 

National Pollutant Discharge Elimination System Home

Stormwater Information
Recent Additions

FAQs

Publications

Regulations

Training & Meetings

Links

Contacts

 
 Register to Receive NPDES News Alerts!  

You will need Adobe Reader to view some of the files on this page. Files are best viewed in Internet Explorer and Adobe 8.0 or higher. See EPA's PDF page to learn more.

 

Office of Water | Office of Wastewater Management | Disclaimer | Search EPA

Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last updated on July 24, 2013 10:36 AM
URL:http://cfpub2.epa.gov/npdes/stormwater/urbanmaps.cfm