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Air emissions inventory and reporting

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2/23/21 COVID-19 UPDATE: 

Thank you for your patience during the COVID-19 public health emergency. As state agencies continue operations, please understand that most of our staff are continuing to telework and may have limited access to files and delayed online connectivity.

Field work, including compliance inspections, is still taking place but at a limited basis. In most cases, staff will schedule pre-inspection calls with facilities to gather some of the information that would previously have been collected while on-site. These advance calls will also be used to discuss safety protocols for on-site visits that may be needed to complete all aspects of a compliance assessment.

Staff will keep their voicemails and out-of-office messages up to date and will respond as they are able.

For the most up-to-date information, please visit our COVID-19 information webpage. For program-specific information, please search keyword "COVID19."

Each year facilities throughout the state that emit air pollutants are required to report their emissions to the DNR. These pages provide instructions for reporting emissions through the Air Reporting System (ARS), as well as information on air pollutants and data on historical emissions.

DNR Switchboard

Report your emissions with the DNR Switchboard.

Historical Emissions Data

See how Wisconsin air emissions have changed over time.

Electronic Reporting Tutorials

Learn how to use the Air Reporting System (ARS) to report facility air emissions.

Air Quality

Learn about air quality in Wisconsin.
Air Quality

Air Permits

Learn about Wisconsin's air permit process.
Air Permits

Air Program Contacts

Our organization chart, staff lists and contacts by topic.
Air Program Contacts