Stillwater, MN
Long-term air quality
What this page tells you
This page combines annual PM2.5, unhealthy days, 5-year trend, and data coverage so you can compare long-term air quality, not just today's reading.
Stillwater, MN air quality summary: Stillwater, MN maintains a clean air score of 78.4 and a B grade. The city's annual PM2.5 mean is 6.6, which is an acceptable level for long-term living conditions. Stillwater has an annual PM2.5 mean of 6.6, measuring the typical concentration of fine particles in the air throughout the year. The air quality trend in Stillwater is neutral, showing limited change in recent years.
Clean Air Score
A clean air score of 78.4 and B grade indicate good long-term air quality with moderate particulate levels. This suggests a relatively healthy environment for long-term residents.
🏡 What This Means for Buying
Stillwater's air quality is a favorable consideration for homebuyers seeking a balanced environment. It should be treated as one positive factor among many in a relocation decision.
Indoor Air Quality in Stillwater, MN
Outdoor pollution can still affect indoor air when windows are open, filtration is weak, or wildfire smoke moves in.
How to react when today's AQI changes
Use the AQI bands below to decide whether to open windows, run an air purifier, or stay indoors when pollution spikes in Stillwater.
AQI 0-50
GoodOpen windows: Open windows if you want fresh air.
Air purifier: No purifier needed for most homes.
Indoor activity: Normal indoor activity is fine.
AQI 51-100
ModerateOpen windows: Sensitive groups should limit open-window time.
Air purifier: Use fans or filtration if dust or pollen is bothering you.
Indoor activity: Most people can stay active indoors.
AQI 101-150
Unhealthy for Sensitive GroupsOpen windows: Keep windows closed.
Air purifier: Run a HEPA purifier in the main room and bedroom.
Indoor activity: Sensitive groups should reduce outdoor exposure.
AQI 151+
UnhealthyOpen windows: Keep windows and doors closed.
Air purifier: Run HEPA continuously and seal obvious drafts.
Indoor activity: Stay indoors as much as possible; use an N95 if you must go out.
Common indoor air concerns in Stillwater:
- Seasonal pollen and dust mite allergens
- VOCs from household products
Recommended action: If today's AQI reaches 101 or higher, close windows and run HEPA filtration before indoor air starts to feel smoky or stale.
Top Products for Stillwater Homes:
🩺 My Health Risk Assessment
See how Stillwater's air quality affects you and your family specifically.
Health Advice
Enjoy the outdoors! Air quality is great.
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Stillwater's air quality improved by 0.1 μg/m³. Based on NBER studies, this change correlates with a estimated 0.4% increase in relative property value retention.
Cleaner Alternatives in MN
Why Stillwater earned a 78.4
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
Avoid pollution spikes on your next ride.
📅 Past 30 Days Trend
Real-time daily PM2.5 AQI
🌸 Pollen Outlook
Current Seasonal Forecast
How it worksBased on current seasonal forecast data. Not a long-term pollution rating or relocation score.
Score Breakdown
| Component | Weight | Score Contribution |
|---|---|---|
| Annual Air Quality | 40% | 76.6 |
| Unhealthy Days | 25% | 94.5 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 91.2 |
| Extreme Events | 5% | 100 |
Explore More Air Quality Data
Frequently Asked Questions
About This Data
Data Sources
Historical air quality mapping and scoring are based completely on official U.S. Environmental Protection Agency (EPA) AirNow API data. 5-day AQI forecasts are provided by WAQI.
Methodology
Our Clean Air Score (0-100) is a proprietary algorithm that weighs multiple factors:
- Annual PM2.5 averages (40%)
- Frequency of unhealthy days (25%)
- 5-year pollution trends (20%)
- Seasonal variability and extreme events (15%)
Updates & Accuracy
Real-time data is updated hourly. Historical aggregate scores are recalculated monthly to reflect the latest trends. While we strive for accuracy, sensor maintenance and local conditions can affect individual readings.
Practical Advice
When AQI > 100: Sensitive groups (children, elderly, asthmatics) should limit prolonged outdoor exertion.
When AQI > 150: Everyone should avoid outdoor exercise and keep windows closed.
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Stillwater Air Quality FAQs
Is Stillwater a good fit for people who care about long-term air quality?
Stillwater is a solid option with a clean air score of 78.4 and a B grade. The annual PM2.5 mean of 6.6 is moderate and suitable for long-term residency.
What is the frequency of unhealthy air or long-term pollution exposure in Stillwater?
Stillwater experiences 0.3% unhealthy days, which is quite low for the region. Its B grade and 6.6 annual PM2.5 mean reflect a generally clean atmosphere.
Is air quality in Stillwater improving or getting worse over time?
The air quality in Stillwater is currently stable. Recent data indicates a neutral trend with no major shifts in pollution levels.
Does air quality vary across different parts of Stillwater?
Air quality can vary within the city due to local traffic, industry, and location patterns. Specific locations near transit corridors may experience slightly different conditions than quieter areas.