Gloucester, 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.
Gloucester, MA air quality summary: Gloucester, MA holds a Clean Air Score of 55.4 and a grade of C, with an annual PM2.5 mean of 8.8 µg/m³. This data summarizes the long-term atmospheric conditions based on historical particulate measurements. Gloucester records an annual PM2.5 mean of 8.8 µg/m³, which is considered moderate for long-term exposure. Historical records indicate that long-term air quality in Gloucester has been worsening over recent years.
Clean Air Score
A Clean Air Score of 55.4 and C grade reflect moderate long-term particulate levels in Gloucester. These metrics assess the typical environmental exposure for residents over time.
🏡 What This Means for Buying
Evaluating air quality in Gloucester should be one element of a long-term living assessment. The C grade offers a neutral data point for homebuyers to consider alongside other factors.
Indoor Air Quality in Gloucester, 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 Gloucester.
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 Gloucester:
- 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 Gloucester Homes:
🩺 My Health Risk Assessment
See how Gloucester's air quality affects you and your family specifically.
Health Advice
Good for most outdoor activities.
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Gloucester'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 Gloucester 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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Gloucester Air Quality FAQs
Is Gloucester a good fit for people who care about long-term air quality?
Gloucester, MA holds a Clean Air Score of 55.4 and a grade of C, with an annual PM2.5 mean of 8.8 µg/m³. This suggests a moderate long-term air quality profile for the city.
How often does Gloucester experience unhealthy air frequency?
Gloucester records 1.1% unhealthy air days, which aligns with its C grade and annual PM2.5 mean of 8.8 µg/m³. This indicates that residents may experience occasional spikes in pollution levels.
Is the air quality in Gloucester improving or getting worse over time?
Air quality in Gloucester is described as worsening over recent years based on long-term trend data.
Does air quality vary within Gloucester?
Air quality can fluctuate across Gloucester due to factors such as local traffic and industrial patterns, even without naming specific districts.