MS4_Areas Kristopher DeNardi USEPA R3 denardi.kristopher@epa.gov This GIS dataset contains polygons depicting Municipal Separate Storm Sewer System (MS4) Phase II permits for urbanized areas that are within the municipality boundaries and incorporated places in Region 3. Traditional permits are represented in this dataset; non-traditional permits are not. The dataset should be used as a reference only and should not be relied upon for precise calculations when it comes to permitted area, as combining data sources of different resolutions results in a loss of accuracy. Polluted stormwater runoff is commonly transported through Municipal Separate Storm Sewer Systems (MS4s), from which it is often discharged untreated into local waterbodies. An MS4 is a conveyance or system of conveyances that is: - Owned by a state, city, town, village, or other public entity that discharges to waters of the U.S.; - Designed or used to collect or convey stormwater (including storm drains, pipes, ditches, etc.); - Not a combined sewer; and - Not part of a Publicly Owned Treatment Works (sewage treatment plant). To prevent harmful pollutants from being washed or dumped into an MS4, operators must obtain a NPDES permit and develop a stormwater management program. MS4 permits were issued in two phases. Phase I, issued in 1990, requires medium and large cities or certain counties with populations of 100,000 or more to obtain NPDES permit coverage for their stormwater discharges. Nationally there are approximately 855 Phase I MS4s. Phase II, issued in 1999, requires regulated small MS4s in urbanized areas, as well as small MS4s outside the urbanized areas that are designated by the permitting authority, to obtain NPDES permit coverage for their stormwater discharges. Nationally there are approximately 6,700 Phase II MS4s. Generally, Phase I MS4s are covered by individual permits and Phase II MS4s are covered by a general permit. Each regulated MS4 is required to develop and implement a stormwater management program (SWMP) to reduce the contamination of stormwater runoff and prohibit illicit discharges. Permitted areas in this dataset for PA, De, VA and WV were based on U.S. Census 2000 and U.S. Census 2010 urbanized area layers which were used to represent expanded areas of Phase II coverage with one exception for Berkeley County, WV. The Berkeley County permit covers the entire county, excluding incorporated areas. Existing MS4 Phase II permitted areas were defined by the 2000 data and expanded MS4 Phase II permit coverage was depicted using the 2010 urbanized area data. (Note that only urbanized areas were utilized in this analysis. Clusters were not included.) Permitted areas in MD are represented by the entire municipal boundary rather than urbanized area within the municipal boundary, per the MD state regulations. Exceptions to this are for Cecil and Washington counties, where permits cover the entire county, excluding municipal areas. Features representing MS4 coverage of government agency entities, such as state Departments of Transportation and federal lands and sites are not included. Steps used to create this dataset included: 1) Municipal boundaries for PA, DE, VA, and WV were integrated. Municipal boundaries for Maryland were embedded into the county boundaries for Maryland (due to MS4 permitting nuances followed by the state of Maryland). This resulted in an administrative layer representing administrative localities that have MS4 obligations to the federal government. 2) The U.S. Census 2000 urban area coverage was modified to represent only land area by removing areas of water, as determined by waterbody data (100K resolution). This resulting urbanized land area was clipped to the administrative layer created in step (1). 3) The resulting polygon layer depicts urbanized land area (as of 2000) that is within municipal boundaries of Region 3. 4) MS4 permit administration point data (aka the physical location of the permit, usually a city hall) were linked to the polygon area representing MS4 Phase II permitted areas based on spatial location and the permit holder. 5) Steps 2 and 3 were repeated using U.S. Census 2010 urban area coverage and appended to the existing MS4 Phase II areas to show additional land area that will be (or is currently being) incorporated into existing permits. Purpose: The purpose of this GIS dataset is to display polygons depicting Municipal Separate Storm Sewer System (MS4) Phase II permits for urbanized areas that are within the municipality boundaries and incorporated places in Region 3. Attributes of the dataset include county name, fips number, permit number, and facility information including contacts. Traditional permits are represented in this dataset; non-traditional permits are not. The dataset should be used as a reference only and should not be relied upon for precise calculations when it comes to permitted area, as combining data sources of different resolutions results in a loss of accuracy. This web service presents polygons depicting Municipal Separate Storm Sewer System (MS4) Phase II permits for urbanized areas that are within the municipality boundaries and incorporated places in West Virginia. EPA, TeleAtlas, Census Bureau WVMS4WaterWest VirginiaREG 03HumanBoundaries and Base DataEnvironmentConservationMunicipal Separate Storm Sewer System Kristopher DeNardi USEPA R3 denardi.kristopher@epa.gov Although these data have been processed successfully on a computer system at the Environmental Protection Agency, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The U.S. Environmental Protection Agency shall not be held liable for improper or incorrect use of the data described and/or contained herein. From TANA: No warranty, expressed or implied, is made and no liability is assumed by Tele Atlas(R) as to the positional or attribute accuracy of the data. The act of distribution shall not constitute any such warranty and no responsibility is assumed by Tele Atlas(R) in the use of these files.  Please check sources, scale, accuracy, currency and other available information. Please confirm that you are using the most recent copy of both data and metadata. Acknowledgement of the EPA would be appreciated. https://services.arcgis.com/cJ9YHowT8TU7DUyn/arcgis/rest/services/MS4_Areas/FeatureServer North American Profile of ISO19115 2003 2019-04-17 08:09:53.71 2019-04-17 08:26:08.65 1.0 NAP editor:esri.dijit.metadata.editor 2019-04-17 160f65195eb04b779ea5dc6521d7b690 Kristopher DeNardi USEPA R3 denardi.kristopher@epa.gov