Alternative Text Description for FDEP NPDES Stormwater Permits

TABLE OF CONTENTS

MAP OVERVIEW

This map displays the locations of permitted Municipal Separate Storm Sewer Systems (MS4) under the National Pollutant Discharge Elimination System (NPDES) program administered by the Florida Department of Environmental Protection. MS4 permits regulate stormwater discharges from publicly-owned conveyances such as roads with stormwater systems, municipal streets, catch basins, curbs, gutters, ditches, constructed channels, and storm drains that discharge to waters of the state. The map shows the geographic distribution of these permitted stormwater systems across Florida and portions of neighboring states.

GEOGRAPHIC CONTEXT

The map covers the state of Florida and portions of southern Georgia and southeastern Alabama. Major cities labeled include Jacksonville on the northeast coast, Orlando in central Florida, Tampa and St. Petersburg on the west-central coast, Miami on the southeast coast, Cape Coral on the southwest coast, and Pensacola in the panhandle. Additional cities labeled include Savannah, Albany, Dothan, Valdosta, Tallahassee, Gainesville, Palm Coast, Lakeland, Palm Bay, Port St. Lucie, and Coral Springs. The map shows Florida's distinctive peninsula extending southward, bordered by the Atlantic Ocean to the east and the Gulf of America to the west.

KEY INSIGHTS

NPDES stormwater permits are concentrated in urbanized areas throughout Florida, with particularly notable clusters around major metropolitan regions. The densest concentrations of permitted MS4 systems appear in the Jacksonville metropolitan area, the Orlando region, the Tampa-St. Petersburg area, and the greater Miami metropolitan area extending northward through the southeast coast. The central and northern Gulf coast shows substantial permit coverage around the Tampa Bay region and extending into the panhandle. Relatively fewer permits are visible in rural interior portions of the state, suggesting that stormwater permit requirements correlate strongly with urban development patterns.

VISUAL ELEMENTS

FDEP NPDES Stormwater Permits

This layer represents the locations of Municipal Separate Storm Sewer Systems that hold active NPDES stormwater permits issued by the Florida Department of Environmental Protection.

Permitted MS4 Systems (light tan polygons)

Appearance:

Permitted areas are depicted as light tan or beige shaded polygons with irregular boundaries that follow municipal or jurisdictional limits.

Distribution:

Permitted MS4 systems are distributed throughout Florida with concentrations along both coasts and in major metropolitan areas. Inland areas show fewer permitted systems.

Notable locations:

Spatial patterns:

The permitted areas form irregular shapes that generally follow municipal boundaries and urbanized zones. Permits cluster along major transportation corridors and coastal development areas. There is a clear coastal concentration pattern with permits extending inland primarily around major cities. The pattern suggests that most significant urban centers in Florida operate under NPDES stormwater permits, while agricultural and undeveloped rural areas do not contain visible permitted MS4 systems.

Overlapping Patterns

Multiple adjacent permitted systems often appear near one another in metropolitan regions, suggesting that neighboring municipalities or districts each maintain separate MS4 permits. The Tampa Bay area and southeast Florida corridor show particularly complex patterns of adjacent permitted jurisdictions.

SYMBOL GUIDE

ADDITIONAL INFORMATION

This map displays jurisdictions that hold permits for municipal separate storm sewer systems rather than individual stormwater infrastructure features. An MS4 is defined as a conveyance or system of conveyances owned or operated by a state, city, town, county, special district, association, or other public body that is designed or used for collecting or conveying stormwater and that discharges to waters of the state. MS4 systems specifically exclude combined sewers and Publicly Owned Treatment Works (POTW) that treat municipal sewage or industrial wastes. The permit coverage shown represents the geographic extent of jurisdictional responsibility for managing stormwater discharges under the NPDES program.

DATA CONTEXT

Data Source:

Data is provided by the Florida Department of Environmental Protection and represents jurisdictions holding active NPDES stormwater permits for Municipal Separate Storm Sewer Systems. The data source layer name is NPDES_STORMWATER_NOV21.

Definition Query:

No definition query or filter criteria was provided. The map appears to show all available NPDES stormwater permits in the dataset.

Scale Information:

The map is displayed at a statewide scale showing the entire state of Florida and portions of adjacent states. At this scale, individual stormwater infrastructure features are not visible; rather, the map shows the boundaries of permitted jurisdictions.

Coordinate System:

NAD_1983_HARN_Florida_GDL_Albers (WKID 3087)

Time Period of Content:

Based on the data source layer name, the dataset appears to be from November 2021. The map represents permit coverage as of that time period.

Limitations:

The map shows permitted MS4 jurisdictions rather than the actual stormwater infrastructure or discharge points. Not all stormwater systems require NPDES permits; smaller systems and certain categories may be excluded from permit requirements. The data represents regulatory permit coverage and should not be interpreted as a comprehensive inventory of all stormwater infrastructure in Florida.

Map Coverage:

The map extends from the southern tip of Florida at approximately 25 degrees north latitude to southern Georgia and southeastern Alabama at approximately 31 degrees north latitude. The eastern extent includes the Atlantic coastline and offshore areas, while the western extent includes the Gulf of America coastline and portions of the Florida panhandle extending to approximately Pensacola. Areas shown in gray represent water bodies and areas outside Florida's jurisdictional boundaries where FDEP stormwater permits do not apply.

The alternative text description of this map was AI-generated and may contain inaccuracies.