EPA Enforcement and Compliance History Online (ECHO)
EPA Enforcement and Compliance History Online (ECHO) is a US Environmental Protection Agency web resource that provides access to compliance and enforcement information for regulated facilities, along with integrated environmental data downloads. ECHO hosts the PFAS Analytic Tools, which aggregate per- and polyfluoroalkyl substance (PFAS) information from multiple EPA programs, including drinking water sampling, clean water discharge monitoring, facility registry records, and greenhouse gas reporting, into downloadable, filterable datasets. SAWGraph obtains several of its federal PFAS datasets through the ECHO PFAS Analytic Tools download interface.
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