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Federal
NHD Levee Centerlines, EPA Region 9, 2011, NHD
U.S. Environmental Protection Agency —
This line feature class contains levee centerlines for EPA Region 9. The National Hydrography Dataset (NHD) is a feature-based database that interconnects and... -
Federal
Impaired Water Quality 303(d) Stream Lines, California, 2016, California State Water Resources Control Board
U.S. Environmental Protection Agency —
This layer includes 1,054 features indicating all assessed linear water bodies for the combined 2014 and 2016 Integrated Report. Under Section 303(d) of the Clean... -
Federal
Impaired Water Quality 303(d) Waterbody Polygons, California, 2016, California State Water Resources Control Board
U.S. Environmental Protection Agency —
This layer includes 303 features indicating all assessed polygonal water bodies for the combined 2014 and 2016 Integrated Report. Under Section 303(d) of the Clean...