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Air Monitoring
Air Monitoring
The ambient air monitoring network is a key element in making sure the air we breathe in our communities is healthy and if we are in attainment with the National Ambient Air Quality Standards (NAAQS). Michigan’s network has over 40 locations across the state with over 100 air monitors.
The new Michigan.gov/MiAir
Your comprehensive hub for up-to-date and historical air monitoring data across Michigan. Explore real-time pollutant monitoring data alongside the color-coded Air Quality Index (AQI) to stay informed about air quality conditions.
The air quality monitoring network
The purpose of the monitors it to measure pollutant concentrations in the outdoor (ambient) air. Ambient air is the air that the public breathes where we live, work, and play. The purpose of the network is to measure air pollutants over long periods to:
- ensure air quality standards are met,
- identify pollution trends,
- support air pollution forecasting,
- provide real-time air quality information,
- assess community exposure, and
- be used in air quality models.
This network consists of meteorological, gaseous, particle and air toxics monitors mandated by the USEPA in 40 CFR, Part 58 as part of the Michigan State Implementation Plan (SIP). The network is not intended to tell us where pollutants come from or to be used as a tool to regulate a specific company or industry type.
Data and reports
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Monitoring data summaries
Carbon monoxide
Lead
- Lead Monthly Average and Three Month Average (2024)
- Lead Monthly Average and Three Month Average (2023)
- Lead Highest Three Month Average (2010-2023)
Nitrogen dioxide
- Nitrogen Dioxide 1-hour 98th Percentile and Three Year Average
- Nitrogen Dioxide Annual Average Per Year
Ozone
- Ozone Design Values (2020-2023) and Maximum Allowable Values (2024)
- Ozone Current Year Highest 8-hour Concentrations (2024)
- Ozone Historical Highest 8-hour Concentrations (1992 to 2023)
- Ozone Fourth Highest Maximum 8-hour Per Year and Three Year Average (2005-2022)
PM2.5
Sulfur dioxide
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Annual air quality reports
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Annual air monitoring network reviews (plans)
- 2025 Ambient Air Monitoring Network Review
- 2025 Ambient Air Monitoring Network Review - Summary
- 2025 Ambient Air Monitoring Network Review - Executive Summary
- Revisión de la Red de Monitoreo del Aire de 2025 de Michigan - Resumen
- الملخص: مراجعة شبكة مراقبة الهواء في ميشيغان لعام 2025
- 2024 Ambient Air Monitoring Network Review
- 2024 Ambient Air Monitoring Network Review - Summary
- 2023 Ambient Air Monitoring Network Review
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Air toxics studies
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Other monitoring reports
- Community Sampling in Kalamazoo, Michigan 2022
- Exceptional Event Demonstration for Southeast Michigan (January 2023)
- Evaluation of Near-Road Air Pollution at Environmental Justice (EJ) and Non-EJ Communities in the Greater Detroit Area
- Manganese Air Quality Report (March 27, 2012)
- Final Grand Haven Wood Smoke Study 2013
- Final Owosso Wood Smoke Report 2012
- AQI Statistics by Michigan CBSA 2001-2013
- Landfill Emissions of Methane Inferred from Unmanned Aerial Vehicle and Mobile Ground Measurements
- Detroit East Side Air Quality Community Project
How does an air monitor work?
In this video, a technician walks you through an air monitoring station, explains how the equipment works, and what pollutants are measured. The general monitoring factsheet can give more details about monitors in the state.
Air Quality Sensors
The air sensor technology market is expanding as more companies make lower-cost portable sensors available to the public.
What's the difference between air monitors and air sensors?
Air sensors are often used by citizens to get more information on the air quality around them. These can be affordable, portable, and easier to use. The information can help the public learn more about air quality in their communities.
Contact information
Susan Kilmer, Air Quality Division KilmerS@Michigan.gov or 517-242-2655.