Rosemont, CA
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.
Rosemont, CA air quality summary: Rosemont, CA, features a clean air score of 72.7 and a grade of B based on its annual PM2.5 mean of 7.8 µg/m³. These metrics point to a generally acceptable air quality environment for long-term residents. Rosemont has an annual PM2.5 mean of 7.8 µg/m³, which represents a moderate level of long-term particulate exposure. The air quality trend in Rosemont is currently classified as neutral, indicating limited change in recent years.
Clean Air Score
The clean air score of 72.7 and grade of B indicate that the city maintains a moderate air quality profile over the long term. This suggests that while some particulate matter is present, it remains within typical acceptable ranges.
🏡 What This Means for Buying
The consistent B grade suggests that Rosemont offers a stable environmental context for homebuyers. Air quality should be considered alongside other standard relocation factors.
Indoor Air Quality in Rosemont, CA
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 Rosemont.
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 Rosemont:
- Wildfire smoke infiltration (PM2.5)
- 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 Rosemont Homes:
🩺 My Health Risk Assessment
See how Rosemont's air quality affects you and your family specifically.
Health Advice
Good for most outdoor activities.
Add Rosemont Air Quality to your site
Perfect for local news, real estate blogs, and community pages.
</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Rosemont's air quality improved by 0.3 μg/m³. Based on NBER studies, this change correlates with a estimated 1.2% increase in relative property value retention.
Cleaner Alternatives in CA
Why Rosemont earned a 72.7
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% | 59.9 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 87.1 |
| 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.
More Cities in CA
Similar Rankings Nationwide
Rosemont Air Quality FAQs
Is Rosemont a good fit for people who care about long-term air quality?
Rosemont is a suitable option for many, with a clean air score of 72.7 and a grade of B. The annual PM2.5 mean of 7.8 µg/m³ indicates that air quality is generally acceptable for long-term living.
What is the frequency of unhealthy air days in Rosemont?
Rosemont has an unhealthy days percentage of 0%, which is a positive indicator for a city with a B grade. This suggests that the PM2.5 mean of 7.8 µg/m³ is not typically punctuated by extreme pollution events.
Is the air quality in Rosemont improving or getting worse over time?
The long-term air quality in Rosemont is neutral, showing limited or modest change in pollution levels over recent years.
Does air quality vary across different parts of Rosemont?
Air quality can vary within the city due to local traffic, industry, and location patterns. Localized particulate levels may differ from the city-wide average based on proximity to specific sources.