Governmental Agencies

• United States Environmental Protection Agency
  http://epa.gov/
  

• California Department of Toxic Substances Control
  http://www.dtsc.ca.gov/
  

• California Environmental Protection Agency
  http://www.calepa.ca.gov/
  

• County of San Diego Department of Environmental Health
  http://www.sdcounty.ca.gov/deh/
  

• State Water Resources Control Board
  http://www.swrcb.ca.gov/
  

• County of Orange Health Care Agency
  http://www.ochealthinfo.com/
  

• County of Los Angeles Fire Department Hazardous Material Division
  http://fire.lacounty.gov/HealthHazMat/HHMDContacts.asp
  

Professional Organizations

• National Groundwater Association
  http://www.ngwa.org/
  

• California Groundwater Resource Association
  http://www.grac.org/