header image

Hazards Finder

The online sources shown below provide a quick, no- or low-cost method of conducting a preliminary evaluation of local hazards.  No warranty is made by the sponsor of this web site about the accuracy of any data obtained from these sources.


Site:  Airnav.com Airport Information
Data available:  location of airports, heliports, and airstrips
Web address:  http://www.airnav.com/airports/
Coverage:  International

Site:  Caltrans, Public Use Airports and Federal Airfields Map
Data available:  map of public use airports and federal (including military) airfields
Web address:  http://www.dot.ca.gov/hq/planning/aeronaut/documents/maps/PublicUseAirports_MilitaryAirfieldsMap.pdf
Coverage:  California


Site:  South Coast Air Quality Management District FIND (Facility Information Detail) Database
Data available: information about AQMD-regulated facilities (that is, facilities required to have a permit to operate equipment that releases air pollutants )
Web address: http://www3.aqmd.gov/webappl/fim/prog/search.aspx
Coverage: Southern California

Site:  California Air Resources Board, Community Health Air Pollution Information System (CHAPIS)
Web address: https://www.arb.ca.gov/ch/chapis1/chapis1.htm
Coverage: California


Site:  California Important Farmland Finder
Data available: location of farmlands
Web address: http://maps.conservation.ca.gov/ciff
Coverage: California


Site:  California Department of Conservation Seismic Hazard Zones
Data available: Online maps of state-designated areas of liquefaction hazard, earthquake-induced landslides, etc
Web address: http://maps.conservation.ca.gov/cgs/informationwarehouse/index.html?map=regulatorymaps
Coverage: Statewide

Site:  California Geological Survey, Fault Activity Map of California and Adjacent Areas, 2010
Data available: fault map
Web address: http://maps.conservation.ca.gov/cgs/fam/
Coverage: California

Site:  California Geologic Survey, Alquist-Priolo Earthquake Fault Zones
Data available: Alquist-Priolo Earthquake Fault Zones
Web address: http://maps.conservation.ca.gov/cgs/informationwarehouse/index.html?map=regulatorymaps
Coverage: California

Site:  Southern California Earthquake Data Center
Data Available: “Clickable” fault maps for SoCal with overviews for all major mapped faults
Web address: http://scedc.caltech.edu/significant/
Coverage: Southern California

Site:  California Geological Survey, Earthquake Shaking Potential Maps
Data available: Earthquake shaking potential
Web address:  Statewide: http://www.conservation.ca.gov/cgs/information/publications/ms/Documents/MS48_revised.pdf
Los Angeles region: http://www.seismic.ca.gov/pub/intensitymaps/la_county_print.pdf
Central Coast region: http://www.seismic.ca.gov/pub/intensitymaps/ccoast_county_print.pdf
San Francisco Bay region: http://www.seismic.ca.gov/pub/intensitymaps/sfbay_county_print.pdf
San Diego region: http://www.seismic.ca.gov/pub/intensitymaps/sd_county_print.pdf

Site: California Geological Survey, Landslide Maps
Data available: Landslides mapped by California Geological Survey
Web address: http://maps.conservation.ca.gov/cgs/informationwarehouse/index.html?map=regulatorymaps
Coverage: California

Site:  California Department of Water Resources: Groundwater Information Center
Data Available: ground subsidence areas
Web address: https://gis.water.ca.gov/app/gicima/
Coverage: Statewide

Naturally Occurring Asbestos

Site:  California Geologic Survey:
Data available: Location of Ultramafic Rocks (naturally occurring asbestos
Pamphlet: Web address:  ftp://ftp.consrv.ca.gov/pub/dmg/pubs/ms/59/MS59_Pamphlet.pdf
Map: Web address: ftp://ftp.consrv.ca.gov/pub/dmg/pubs/ms/59/MS59_Plate.pdf  note: 79 Mb
Coverage: California


Site: US Environmental Protection Agency (EPA): A Citizen’s Guide to Radon
Data available: Radon description, hazards, remedies
Web address: https://www.epa.gov/sites/production/files/2016-12/documents/2016_a_citizens_guide_to_radon.pdf
Coverage: Introductory

Site: California Geological Survey Interactive California Radon Potential Map
Data available: Indoor radon potential: interactive map
Web address: http://maps.conservation.ca.gov/cgs/radon/
Coverage: California


Site:  California Department of Toxic Substances Control EnviroStor
Data available: Types of sites listed: federal Superfund sites, State response sites, voluntary cleanup sites, school  cleanup sites, and corrective action sites.
Coverage: California
Web address: http://www.envirostor.dtsc.ca.gov/public/

Site:  California State Water Resources Control Board GeoTracker
Data available: Very similar to EnviroStor above, but with greater emphasis on RWQCB-lead sites.  Also includes a radius search function that allows you to map listed sites within a certain radius of a subject property.
Web address: http://geotracker.waterboards.ca.gov/
Coverage: California

Site:  EnviroMapper, US Environmental Protection Agency
Data available: Types of sites listed: hazardous waste generators (Resource Conservation and Recovery Act [RCRA] Large Quantity Generators [LQG] and Small Quantity Generators [SQG]; selected other data collected by USEPA
Web address: http://www.epa.gov/emefdata/em4ef.home
Coverage: Nationwide

Site:  California Department of Resources Recovery and Recycling (CalRECYCLE) Facility/Site Search
Data available: Solid waste disposal sites; recycling facilities; composting/greenwaste facilities
Web address: http://www.calrecycle.ca.gov/SWFacilities/Directory/Search.aspx
Coverage: Statewide


Site:  California Department of Water Resources, Groundwater Information Center
Data available: Groundwater basins maps
Web Address: https://gis.water.ca.gov/app/gicima/
Coverage: California

Site:  California State Water Resources Control Board GeoTracker
Data available: Watersheds
Web Address: http://geotracker.waterboards.ca.gov/
Coverage: California

Site:  FEMA Flood Maps
Data available:User-generated flood insurance rate maps
Web address: http://msc.fema.gov/portal
Coverage: Nationwide

Site: California Geological Survey Tsunami Inundation Zones
Data available:Tsunami inundation zones
Web Address: http://www.arcgis.com/home/webmap/viewer.html?useExisting=1&layers=4d56b41ba6c64d538ec3a91d40078dff
Coverage: California


Site:  US Environmental Protection Agency, Environmental Justice Screening and Mapping Tool (EJSCREEN)
Data available: Air pollutant emissions (PM 2.5, ozone, diesel particulates; cancer risk; respiratory hazard index); proximity to heavy traffic; lead paint; proximity to certain categories of hazardous materials sites
Web Address: https://ejscreen.epa.gov/mapper/
Coverage: Nationwide

Site:  California Governor’s Office of Emergency Services, MyHazards
Data available:  Alquist-Priolo Earthquake Fault Zones; Liquefaction (required zones of investigation); 100-year flood zones [FEMA]; fire hazard severity zones [California Department of Forestry and Fire Prevention]; Tsunami Emergency Response Planning Zones
Web Address: http://myhazards.caloes.ca.gov/
Coverage: California. Fire hazard severity zones show State Responsibility Areas only, not local or federal responsibility areas.

Site:  City of Los Angeles Department of City Planning Zone Information and Map Access System (ZIMAS)
Data available: parcel-specific information about  airport hazards, coastal zones, very high fire hazard severity zones, flood zones, hazardous waste / border zone properties, methane hazard sites, high wind velocity areas, hillside grading restrictions, oil wells, alquist-priolo fault zones, landslide hazards, liquefaction zones
Web address: http://zimas.lacity.org
Coverage: City of Los Angeles


Site:  California Div. of Oil, Gas, and Geothermal Resources, Map of Oil and Natural Gas Wells
Data available: Maps show township, range, and sections for the entire state (even urban areas where sections are often not shown on topo maps).  Quicker way to find township and range info than  Terrain Navigator.
Web address: http://www.conservation.ca.gov/dog/Pages/WellFinder.aspx
Coverage: California


Site:  Pipeline and Hazardous Materials Safety Administration, National Pipeline Mapping System
Data available: Gas transmission pipelines and hazardous liquid trunklines, one county at a time. Access to the data is restricted.
Web address: http://www.npms.phmsa.dot.gov/
Coverage: Nationwide, county by county

Site: Southern California Gas Company, Natural Gas Pipeline Map
Data available: Natural gas pipelines (transmission and high-pressure distribution) in Southern California Gas Company’s service area
Web address: http://www.socalgas.com/safety/pipeline-maps/
Coverage: Southern California Gas Company service area

Site:  Pacific Gas & Electric, Natural Gas Transmission Pipelines Map
Data available: Natural gas transmission pipelines in Pacific Gas & Electric service area
Web address: http://www.pge.com/en/safety/systemworks/gas/transmissionpipelines/index.page
Coverage: Pacific Gas & Electric service area

Site:  San Diego Gas & Electric, High Pressure Gas Pipelines Map
Data available: Natural gas pipelines (transmission and high-pressure distribution) in San Diego County
Web address: http://www.sdge.com/safety/gas-safety/natural-gas-safety-map
Coverage: San Diego County


Site: Federal Railroad Administration, Safety Map
Data available: Railroads: classification, owner, grade crossings, traffic
Web address: http://fragis.fra.dot.gov/GISFRASafety/
Coverage: Nationwide


Site: Caltrans, Annual Average Daily Traffic on State Highways
Data available: Traffic volumes on state highways
Website: http://traffic-counts.dot.ca.gov/
Coverage: California


Site: Greeninfo Network, California School Campus Database (CSCD)
Data available: active public schools in California
Web address: http://www.mapcollaborator.org/mapcollab_cscd/?base=map&y=37.34396&x=-123.48633&z=6&layers=notes%2Cpolygons%2Cuploads%2Cschoolboundaries&opacs=100%2C25%2C90%2C100
Coverage: California


Site:  Fire Hazard Severity Zones Maps, California Department of Forestry and Fire Protection (Cal Fire)
Data available: CAL FIRE hazard zones viewed by county with state and local responsibility areas
Web address: http://www.fire.ca.gov/fire_prevention/fire_prevention_wildland_zones_maps
Coverage: California


Sponsored by: PlaceWorks