Found 8 datasets matching filters.
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This dataset includes versions of the WWHM as they are released, including installation files and descriptions of changes along with dates and version numbers. WWHM2012 is still the official...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 11, 2026 at 02:26 PM -
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 2004-2006 by, then, DC WASA. A...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 10:39 PM -
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), and Combined Sewer (CSS)...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 10:34 PM -
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 of a system of pipes and...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 10:39 PM -
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 of a system of pipes and...
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 10:39 PM -
This dataset looks at all aspects of storm water management in California as managed and regulated by the State Water Resources Control Board, from the **[Stormwater Multiple Application and...
Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: April 27, 2026 at 07:48 PM -
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 stormwater discharged from different...
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: November 21, 2025 at 11:23 PM -
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 census data and they have not been...
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: July 28, 2025 at 07:10 PM
