Wilmington, MA
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.
Wilmington, MA air quality summary: Wilmington, MA, has a clean air score of 55.4 and a grade of C. The city's annual PM2.5 mean is 8.8 micrograms per cubic meter. Wilmington's annual PM2.5 mean is 8.8, which is considered moderate but still relevant for long-term exposure. Long-term air quality in Wilmington has been worsening over recent years.
Clean Air Score
A clean air score of 55.4 and a C grade suggest moderate long-term air quality. These metrics indicate that particulate levels are higher than in some neighboring areas but generally remain within regulatory limits.
🏡 What This Means for Buying
Air quality should be treated as one factor in a broader relocation or housing decision in Wilmington. The C grade indicates a need for awareness of particulate levels over the long term.
Indoor Air Quality in Wilmington, MA
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 Wilmington.
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 Wilmington:
- 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.
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🩺 My Health Risk Assessment
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Health Advice
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Wilmington's air quality worsened by 2.2 μg/m³. Based on NBER studies, this change correlates with a estimated 8.8% decrease in relative property value retention.
Cleaner Alternatives in MA
Why Wilmington earned a 55.4
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% | 45.5 |
| Unhealthy Days | 25% | 78.1 |
| 5-Year Trend | 20% | 39 |
| Seasonal Variability | 10% | 37.3 |
| Extreme Events | 5% | 80 |
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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Wilmington Air Quality FAQs
Is Wilmington a good fit for people who care about long-term air quality?
Wilmington offers moderate air quality, with a score of 55.4 and a C grade. The annual PM2.5 mean of 8.8 suggests that while conditions are acceptable, they are not as pristine as in other regions.
What is the frequency of unhealthy air exposure in Wilmington?
Wilmington has an unhealthy air day frequency of 1.1%, which is relatively low but notable for a C-grade city. This indicates occasional periods of elevated particulate matter.
Is air quality in Wilmington improving or getting worse over time?
The trend for air quality in Wilmington has been worsening over recent years. This suggests that local particulate levels have seen a slight upward trajectory recently.
Does air quality vary across different parts of Wilmington?
Air quality can vary within the city due to local traffic, industry, and location patterns. Proximity to major transit corridors often correlates with localized increases in particulate matter.