Air Quality Permitting and Regulation

The Division of Air Quality oversees regulations and permits governing the control of air pollution, from all sources in the state, to ensure that Delaware’s air meets State and Federal Air Quality Standards created to protect public health and the environment. The Division provides guidance and technical assistance to regulated businesses and facilities.


We’re Here to Help

Get pre-application help, learn about air quality permits, or visit our Small Business Ombudsman.

Title V: Major Air Sources

Learn how Delaware manages major sources of air pollution, and about the Title V Fee Committee.

Smaller Sources

Learn how Delaware helps small businesses and facilities manage the small amounts of air pollution they may emit.

Permit Applications

Find links to Delaware’s air quality permit applications and basic information on applying for permits.

Equipment Registration

Register any equipment that might, without controls, to emit more than 10 pounds per day of air contaminants.

Emissions Inventory

Report est. emissions of pollutants that form ozone though the State and Local Emissions Inventory System.

Recent Air Quality Public Notices

Air Quality Public Notice Archive