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Appendix Federal Sources FEMA National Flood Hazard Layer FEMA FLOOD The National Flood Hazard Layer (NFHL) data incorporates Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters Of Map Revision (LOMRs) that have been issued against those databases since their publication date. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. The FIRM Database is derived from Flood Insurance Studies (FISs), previously published FIRMs, flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. Indoor Radon Data INDOOR RADON Indoor radon measurements tracked by the Environmental Protection Agency(EPA) and the State Residential Radon Survey. Public Water Systems Violations and Enforcement Data PWSV List of drinking water violations and enforcement actions from the Safe Drinking Water Information System (SDWIS) made available by the Drinking Water Protection Division of the US EPA's Office of Groundwater and Drinking Water. Enforcement sensitive actions are not included in the data released by the EPA. Address information provided in SWDIS may correspond either with the physical location of the water system, or with a contact address. Radon Zone Level RADON ZONE Areas showing the level of Radon Zones (level 1, 2 or 3) by county. This data is maintained by the Environmental Protection Agency (EPA). Safe Drinking Water Information System (SDWIS)_ SDWIS The Safe Drinking Water Information System (SDWIS) contains information about public water systems as reported to US Environmental Protection Agency (EPA) by the states. Addresses may correspond with the location of the water system, or with a contact address. Soil Survey Geographic database SSURGO The Soil Surrey Geographic database (SSURGO) contains information about soil as collected by the National Cooperative Soil Survey at the Natural Resources Conservation Service (NRCS). Soil maps outline areas called map units. The map units are linked to soil properties in a database. Each map unit may contain one to three major components and some minor components. U.S. Fish & Wildlife Service Wetland Data US WETLAND The U.S. Fish & Wildlife Service Wetland layer represents the approximate location and type of wetlands and deepwater habitats in the United States. USGS Current Topo US TOPO US Topo topographic maps are produced by the National Geospatial Program of the U.S. Geological Survey (USGS). The project was launched in late 2009, and the term "US Topo" refers specifically to quadrangle topographic maps published in 2009 and later. USGS Geology US GEOLOGY Seamless maps depicting geological information provided by the United States Geological Survey (USGS). USGS National Water Information System FED USGS The U.S. Geological Survey (USGS)'s National Water Information System (NWIS) is the nation's principal repository of water resources data. This database includes comprehensive information of well -construction details, time -series data for gage height, streamflow, groundwater level, and precipitation and water use data. State Sources Oil and Gas Wells OGW A list of Oil and Gas well locations. This is provided by California's Department of Conservation Division of erisinfo.coml Environmental Risk Information Services Order No: 21072801059p