Frequent Questions

What is the TRI Data Exchange?

What is the TRI Data Exchange (TDX)?


Facilities must submit a copy of each reporting form sent to EPA to the state or tribe in which that facility is located. TDX allows facilities to submit TRI reporting forms simultaneously to both EPA and the appropriate state or tribe through the Central Data Exchange (CDX). TDX also helps EPA, states, tribes, and territories exchange environmental information efficiently and streamlines the acceptance and processing of TRI data by both EPA and the states/tribes. A filer may check to see if their state or tribe is in the TRI Data Exchange by going to For more information on the Exchange Network, please visit their website at

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