Windham, CT
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.
Windham, CT air quality summary: Windham, CT, has a clean air score of 83.8 and a grade of B. The city reports an annual PM2.5 mean of 5.9 micrograms per cubic meter. The annual PM2.5 mean for Windham is 5.9, which represents relatively low long-term particulate exposure. The long-term air quality in Windham has remained stable over recent years.
Clean Air Score
A clean air score of 83.8 and a B grade indicate good long-term air quality. These levels are generally considered protective for long-term residential exposure to particulate matter.
🏡 What This Means for Buying
Windham's air quality is a positive factor for those evaluating long-term housing options. The B grade suggests a stable environment relative to more urbanized areas.
Indoor Air Quality in Windham, CT
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 Windham.
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 Windham:
- 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 Windham Homes:
🩺 My Health Risk Assessment
See how Windham'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, Windham's air quality improved by 0.5 μg/m³. Based on NBER studies, this change correlates with a estimated 2% increase in relative property value retention.
Cleaner Alternatives in CT
No cleaner cities found in this state. Windham is already a top performer!
Why Windham earned a 83.8
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
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📅 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% | 86.7 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 90.9 |
| 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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Windham Air Quality FAQs
Is Windham a good fit for people who care about long-term air quality?
Windham is well-suited for those concerned with air quality, offering a clean air score of 83.8 and a B grade. An annual PM2.5 mean of 5.9 reflects healthy long-term conditions.
What is the frequency of unhealthy air exposure in Windham?
Windham reports a 0% frequency of unhealthy air days, reinforcing its B grade status. This level of consistency is favorable for long-term health planning.
Is air quality in Windham improving or getting worse over time?
The trend for air quality in Windham is currently neutral. Particulate levels have shown little significant fluctuation in recent years.
Does air quality vary across different parts of Windham?
Air quality can vary within the city due to local traffic, industry, and location patterns. Potential residents should consider these factors when looking at specific properties.