Local Air Quality

St. Louis Area Ozone Monitors

The Missouri Department of Natural Resources operates the Arnold, Orchard Farm, and West Alton monitors. The St. Louis County Air Pollution Control Program located in the County Department of Health operates the monitors in that county. The monitors in the City of St. Louis are operated by the St. Louis City Air Pollution Control Program. The Illinois monitors are operated by the Illinois Environmental Protection Agency.

Click here to learn about the Air Quality Index.

About Air Pollution Subcategories

Air Pollution Basics
• What is Ozone?
• Sources of Ozone
• Ozone Formation

Air Quality Facts

Health Effects of Ozone
• St. Louis Population with
Lung Disease
• How Healthy Adults are
Affected by Ozone
• Tips for Exercisers
• Ozone & Hospital
Admissions

Local Air Quality
• St. Louis Monitor Map

Air Quality Index

Air Quality Data