Manchester, NH
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.
Manchester, NH air quality summary: Manchester, NH, holds an impressive clean air score of 87.4 and an air quality grade of A. The city's annual PM2.5 mean is 5.3 micrograms per cubic meter. In Manchester, the PM2.5 annual mean of 5.3 is considered a moderate but relatively low level for long-term exposure. Long-term air quality in Manchester has shown limited or modest change over recent years.
Clean Air Score
A score of 87.4 and an A grade indicate that Manchester consistently maintains high long-term air quality standards. These metrics reflect particulate levels that are consistently low and well within healthy ranges.
🏡 What This Means for Buying
Air quality is a distinct positive attribute for those considering relocation to Manchester. The A grade provides strong evidence of a healthy long-term atmospheric environment.
Indoor Air Quality in Manchester, NH
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 Manchester.
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 Manchester:
- 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 Manchester Homes:
🩺 My Health Risk Assessment
See how Manchester'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, Manchester'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 NH
No cleaner cities found in this state. Manchester is already a top performer!
Why Manchester earned a 87.4
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% | 95.7 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 91.3 |
| 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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Manchester Air Quality FAQs
Is Manchester a good fit for people who care about long-term air quality?
Manchester is an excellent choice for air-conscious residents, as shown by its high score of 87.4 and A grade. The PM2.5 annual mean of 5.3 is among the lower concentrations for the region.
How frequent is unhealthy air in Manchester?
Manchester maintains an unhealthy air day frequency of 0%, which is a key factor in its A grade. This means that acute spikes in particulate pollution are virtually non-existent for residents.
Is air quality in Manchester improving or getting worse over time?
The long-term air quality in Manchester has remained stable, with limited or modest change observed over recent years. This stability indicates a consistently clean environmental profile.
Does air quality vary across different parts of Manchester?
Air quality can vary within Manchester due to local traffic, industry, and location patterns. Even with an A grade city-wide, localized factors like traffic density can cause minor variations.