New London, 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.
New London, CT air quality summary: New London, CT, maintains a clean air score of 83.8 and a grade of B. The annual PM2.5 mean is 5.9, reflecting a healthy long-term environment. New London records an annual PM2.5 mean of 5.9, which is a moderate level for long-term exposure. Long-term air quality in New London has shown limited change over recent years.
Clean Air Score
A score of 83.8 and a grade of B indicate that New London enjoys relatively clean air with few interruptions. This grade reflects a stable environment that is suitable for residents focused on long-term air quality.
🏡 What This Means for Buying
New London's air quality is a positive attribute for those considering long-term residency. The consistent B grade serves as a reliable indicator of healthy atmospheric conditions.
Indoor Air Quality in New London, 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 New London.
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 New London:
- 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 New London Homes:
🩺 My Health Risk Assessment
See how New London'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, New London'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. New London is already a top performer!
Why New London 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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New London Air Quality FAQs
Is New London a good fit for people who care about long-term air quality?
New London is a favorable location, with a clean air score of 83.8 and a grade of B. The annual PM2.5 mean of 5.9 indicates a healthy long-term environment for most residents.
What is the frequency of unhealthy air in New London?
New London reports 0% unhealthy days, indicating that acute pollution events are extremely rare. This performance supports the city's B grade and healthy annual PM2.5 mean.
Is air quality in New London improving or getting worse over time?
Air quality in New London is currently neutral. Data from recent years suggests that particulate levels have remained relatively stable.
Does air quality vary within New London?
Air quality can vary within the city due to local traffic, industry, and location patterns. Residents should consider local emission sources in their evaluation.