-
Municipal Stormwater Permit Outfall Data
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... -
Western Washington Hydrology Model (WWHM)
This dataset includes versions of the WWHM as they are released, including installation files and descriptions of changes along with dates and version numbers. -
RSMP Illicit Discharge Detection and Elimination (IDDE)
Most Municipal Separate Storm Sewer System (MS4) permittees in the State of Washington are a part of the Regional Stormwater Monitoring Program (RSMP). One part of the RSMP is...