Complying with Air Emissions Standards for Stationary Sources
About the Applicability and Compliance Dashboard
The Applicability and Compliance dashboard contains EPA responses to applicability and compliance issues associated with certain stationary source programs under Clean Air Act CAA sections 111, 112, and 129, such as New Source Performance Standards and National Emissions Standards.
Users can search by a particular facility or requestor name, a specific regulation, or by keywords.
The dashboard houses EPA determinations signed since May 2019.
About the Applicability Determination Index
To ensure national consistency in implementing the NSPS and NESHAP programs, EPA maintains a compilation of such letters and memoranda since they were first issued in the Applicability Determination Index (ADI).
The ADI contains "regulatory interpretations" which are written responses that apply to the broad range of NSPS and NESHAP regulatory requirements as they pertain to a whole source category. Users can search by date, office of issuance, subpart, citation, control number, or keyword searches.
The ADI houses EPA determinations signed before May 2019.