Published February 8, 2026
| Version 53.0.0
Dataset
Open
PUDL Raw EPA Hourly Continuous Emission Monitoring System (CEMS)
Description
US EPA hourly Continuous Emissions Monitoring System (CEMS) data. Hourly CO2, SO2, NOx emissions and gross load. Archived from https://campd.epa.gov/
This archive contains raw input data for the Public Utility Data Liberation (PUDL) software developed by Catalyst Cooperative. It is organized into Frictionless Data Packages. For additional information about this data and PUDL, see the following resources:
In order to enable more regular CEMS updates, this dataset replaces a prior PUDL EPA CEMS archive that pulled one annual file for each state. That archive is no longer updated but can be found here.
Files
datapackage.json
Files
(10.1 GB)
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