CalTrans Hydrologic Area and Sub Areas mapping, provides HSA numbers, 303(d) listed water bodies and other watershed information.
California Department of Water Resources (DWR) Groundwater Level Data Mapping
San Bernardino County Stormwater Pollution Prevention - Includes downloadable outreach and educational materials, current WQMP templates (editable version) and tips on reducing pollution.
Web Soil Survey (WSS) – It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world. NRCS has soil maps and data available online including “K” factors and soils types.
NOAA weather forecast