The maps presented below were developed by cities/towns in Santa Clara County and the Unincorporated County using the best available information. The maps are consistent with the requirements included in the Municipal Regional Stormwater National Pollutant Discharge Elimination System (NPDES) Permit (Order No. R2-2015-0049) issued by the San Francisco Bay Regional Water Quality Control Board to address discharges from municipal separate storm sewer systems (MS4s). The Baseline Trash Generation maps depict the levels of trash observed circa 2009 on streets, sidewalks and other jurisdictional land areas draining to MS4s. The Directly Connected Land Areas maps illustrate to the land areas that are > 10,000 ft2 and directly connected to the city/town/county MS4. All maps are subject to revision.