Montpelier, North Dakota Air Quality
Montpelier has a median AQI of 10, earning an air quality grade of A+ — excellent air quality that ranks better than 99% of US cities. Air quality has remained relatively stable over the past decade. Particulate matter (PM10) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2017, Montpelier recorded 352 good air quality days (98% of monitored days).
Population: 99 • County: Stutsman
Current AQI
Quick Facts
| Current AQI | 11 — Good |
| Air Quality Grade | A+ |
| Median AQI (2017) | 10 |
| vs. U.S. Cities | Better than 99% |
| Primary Pollutant | PM10 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | → Stable |
| 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 Montpelier is sourced from the Fargo NW monitoring area, located approximately 84 miles from city center. This EPA-certified station continuously tracks particulate matter (PM10), the primary driver of air quality alerts in this area.
Montpelier 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
Montpelier Median AQI by Year
Annual EPA air quality data for Montpelier — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2017 | 10 | 352 | — | 75 | PM10 |
| 2016 | 8 | 359 | — | 88 | PM10 |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2017 Air Quality Summary
Primary Pollutant Days (2017)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Montpelier Air Quality
What is the air quality in Montpelier today?
The current AQI in Montpelier is 11, 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 Montpelier getting better or worse?
Air quality in Montpelier has been stable. The median AQI has risen 2 points (from 8 in 2016 to 10 in 2017).
What is the most common air pollutant in Montpelier?
PM10 is the primary air pollutant in Montpelier, responsible for 359 days (100% of monitored days) in 2017. Particulate matter originates from vehicle exhaust, wildfires, construction, and industrial activity.
How many unhealthy air days does Montpelier have per year?
In 2017, Montpelier recorded 98% good air quality days (352 days) out of 359 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 75.
What air quality grade does Montpelier receive?
Montpelier receives an air quality grade of A+, placing it better than 99% of US cities. This is based on a median AQI of 10 in 2017, with 352 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 99% of US cities
Nearby Cities
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National Rankings
See how Montpelier compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Montpelier
Montpelier'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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