Petersburg, Michigan Air Quality
Petersburg has a median AQI of 18, earning an air quality grade of A+ — excellent air quality that ranks better than 96% of US cities. Air quality has been improving steadily over the past decade, a positive sign for residents. Particulate matter (PM10) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2024, Petersburg recorded 56 good air quality days (95% of monitored days).
Population: 1,179 • County: Monroe
Current AQI
Quick Facts
| Current AQI | 13 — Good |
| Air Quality Grade | A+ |
| Median AQI (2024) | 18 |
| vs. U.S. Cities | Better than 96% |
| Primary Pollutant | PM10 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↑ Improving |
| Data Source | EPA AQS (historical) · AirNow (live) |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Petersburg is sourced from the Tecumseh monitoring area, located approximately 14 miles from city center. This EPA-certified station continuously tracks particulate matter (PM10), the primary driver of air quality alerts in this area.
Petersburg has relatively consistent air quality throughout the year without a strong seasonal peak. Air quality is primarily influenced by local traffic, industrial activity, and regional weather patterns rather than a single seasonal driver.
AQI Trend (10 Years)
Air Quality Days by Year
Petersburg Median AQI by Year
Annual EPA air quality data for Petersburg — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2024 | 18 | 56 | — | 77 | PM10 |
| 2023 | 25 | 59 | — | 82 | PM10 |
| 2022 | 26 | 51 | 2 | 607 | PM10 |
| 2021 | 19 | 57 | — | 77 | PM10 |
| 2020 | 17 | 58 | — | 66 | PM10 |
| 2019 | 16 | 57 | — | 76 | PM10 |
| 2018 | 13 | 60 | — | 59 | PM10 |
| 2017 | 38 | 78 | — | 88 | PM2.5 |
| 2016 | 41 | 79 | — | 72 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2024 Air Quality Summary
Primary Pollutant Days (2024)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Petersburg Air Quality
What is the air quality in Petersburg today?
The current AQI in Petersburg is 13, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Petersburg getting better or worse?
Air quality in Petersburg has been improving. The median AQI has dropped 23 points (from 41 in 2016 to 18 in 2024), a positive trend for residents.
What is the most common air pollutant in Petersburg?
PM10 is the primary air pollutant in Petersburg, responsible for 59 days (100% of monitored days) in 2024. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Petersburg have per year?
In 2024, Petersburg recorded 95% good air quality days (56 days) out of 59 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 77.
What air quality grade does Petersburg receive?
Petersburg receives an air quality grade of A+, placing it better than 96% of US cities. This is based on a median AQI of 18 in 2024, with 56 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 96% of US cities
Nearby Cities
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National Rankings
See how Petersburg compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Petersburg
Petersburg's primary pollutant is PM10 (coarse dust and pollen). Units with a washable pre-filter stage plus True HEPA handle the larger particles that drive most of this area's air quality days.
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