Brimley, Michigan Air Quality
Brimley has a median AQI of 43, earning an air quality grade of A- — excellent air quality that ranks better than 43% of US cities. Air quality has been trending worse over the past decade, a concern for local residents and health officials. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2019, Brimley recorded 42 good air quality days (72% of monitored days).
Population: 345 • County: Chippewa
Current AQI
Quick Facts
| Current AQI | 8 — Good |
| Air Quality Grade | A- |
| Median AQI (2019) | 43 |
| vs. U.S. Cities | Better than 43% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↓ Worsening |
| 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 Brimley is sourced from the Sault Ste Marie monitoring area, located approximately 16 miles from city center. This EPA-certified station continuously tracks particulate matter (PM2.5), the primary driver of air quality alerts in this area.
Brimley 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
Brimley Median AQI by Year
Annual EPA air quality data for Brimley — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2019 | 43 | 42 | — | 66 | PM2.5 |
| 2018 | 43 | 167 | — | 73 | PM2.5 |
| 2017 | 39 | 238 | — | 87 | PM2.5 |
| 2016 | 37 | 258 | 1 | 101 | PM2.5 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2019 Air Quality Summary
Primary Pollutant Days (2019)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Brimley Air Quality
What is the air quality in Brimley today?
The current AQI in Brimley is 8, 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 Brimley getting better or worse?
Air quality in Brimley has been worsening. The median AQI has risen 6 points (from 37 in 2016 to 43 in 2019), a concern for local health officials.
What is the most common air pollutant in Brimley?
PM2.5 is the primary air pollutant in Brimley, responsible for 58 days (100% of monitored days) in 2019. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Brimley have per year?
In 2019, Brimley recorded 72% good air quality days (42 days) out of 58 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 66.
What air quality grade does Brimley receive?
Brimley receives an air quality grade of A-, placing it better than 43% of US cities. This is based on a median AQI of 43 in 2019, with 42 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 43% of US cities
Nearby Cities
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National Rankings
See how Brimley compares to every other US city by air quality.
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