Chemical Data Reporting (CDR) Public Database Data Dictionary
These dictionaries are intended to assist users in interpreting and using the 2020 and 2016 CDR data.
This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »