U.S. EPA Enforcement and Compliance History Online (ECHO) - All Data

Enforcement and Compliance History Online (ECHO) is a tool developed and maintained by EPA's Office of Enforcement and Compliance Assurance for public use. ECHO provides integrated compliance and enforcement information for over 1 million

Enforcement and Compliance History Online (ECHO) is a tool developed and maintained by EPA's Office of Enforcement and Compliance Assurance for public use.  ECHO provides integrated compliance and enforcement information for over 1 million regulated facilities nationwide.
   ECHO Rest Services provide multiple service endpoints, each with specific capabilities, to search and retrieve data on facilities regulated as Clean Air Act (CAA) stationary sources, Clean Water Act (CWA) dischargers, Resource Conservation and Recovery Act (RCRA) hazardous waste generators/handlers, and Safe Drinking Water Act (SDWA) public water systems.  Data of interest from other EPA sources, such as the Toxics Release Inventory, is also supplied for context.  
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The get_facilities, get_map, get_qid, and get_download end points are meant to be used together, while the enhanced get_facility_info end point is self contained.
    The get_facility_info end point returns either an array of state, county or zip clusters with summary statistics per cluster or an array of facilities.
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The recommended use scenario for get_facilities, get_qid, get_map, and get_downoad is:
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 <b>1)</b>  Use get_facilities to validate