10 datasets found
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State
Municipal Stormwater Permit Outfall Data
State of Washington —
Special Condition S8.D of the 2007-2012 Phase I Municipal Stormwater Permit required permittees to collect and analyze data to evaluate pollutant loadings of... -
County
Environmentally Sensitive Areas
Fairfax County, Virginia —
This polygon dataset is composed of subsets from Fairfax County’s current soil inventory, recorded floodplain, and Resource Protection Area (RPAs) layers. Layer... -
State
Western Washington Hydrology Model (WWHM)
State of Washington —
This dataset includes versions of the WWHM as they are released, including installation files and descriptions of changes along with dates and version numbers. -
State
Stormwater - Regulatory (including Enforcement Actions) Information and Water Quality Results
State of California —
This dataset looks at all aspects of storm water management in California as managed and regulated by the State Water Resources Control Board, from theMunicipal Separate Storm Sewer System Area
District of Columbia —
This layer depicts a generalized boundary of the District’s Municipal Separate Storm Sewer System (MS4) drainage areas. Each sewershed shows the general drainage area...StateWestern Washington Hydrology Model (WWHM)
State of Washington —
This dataset includes versions of the WWHM as they are released, including installation files and descriptions of changes along with dates and version numbers.Statei19 Stormwater Permitees Municipal
State of California —
The feature datasets contain Phase 1 and Phase 2 municipal separate stormwater sewer system (MS4s) permittees in California. These draft layers are based on 2010...MS4 Sewer Shed
District of Columbia —
This layer depicts a generalized boundary of the District’s Municipal Separate Storm Sewer System (MS4) drainage areas. Each sewershed shows the general drainage area...MS4 Storm Sewer Outfalls
District of Columbia —
The dataset contains locations and attributes of the MS4 Storm Sewer outfalls created as part of the District MS4 Permit. GPS outfall locations were captured in...DC Subwatersheds
District of Columbia —
This layer depicts the conglomeration of the 4 layers used for TMDLs. It contains TMDL Subsheds, Direct Drain Overland (not piped), Direct Drain Sewersheds (piped),...10 datasets found