Stevenson Ranch, 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.
Stevenson Ranch, CA air quality summary: Stevenson Ranch, CA has a clean air score of 77.0 and a B grade for air quality. The annual PM2.5 mean is 7.1, which is considered moderate and acceptable. Stevenson Ranch's annual PM2.5 mean is 7.1, measuring the typical concentration of fine particles in the air throughout the year. The long-term air quality trend in Stevenson Ranch is neutral with limited change over recent years.
Clean Air Score
A clean air score of 77.0 and a B grade indicate that Stevenson Ranch has good long-term air quality. This suggests a healthy environment for long-term residents with relatively low exposure to fine particulates.
🏡 What This Means for Buying
Air quality in Stevenson Ranch is a positive consideration that should be included in a relocation or housing decision. It offers a favorable profile compared to many other parts of the state.
Indoor Air Quality in Stevenson Ranch, 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 Stevenson Ranch.
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 Stevenson Ranch:
- 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 Stevenson Ranch Homes:
🩺 My Health Risk Assessment
See how Stevenson Ranch's air quality affects you and your family specifically.
Health Advice
Enjoy the outdoors! Air quality is great.
Add Stevenson Ranch 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, Stevenson Ranch's air quality improved by 0.4 μg/m³. Based on NBER studies, this change correlates with a estimated 1.6% increase in relative property value retention.
Cleaner Alternatives in CA
Why Stevenson Ranch earned a 77
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% | 70.1 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 89.7 |
| 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
Stevenson Ranch Air Quality FAQs
Is Stevenson Ranch a good fit for people who care about long-term air quality?
Stevenson Ranch is a good option with a clean air score of 77.0 and a B grade. The annual PM2.5 mean of 7.1 is moderate and falls within acceptable ranges for long-term residency.
What is the frequency of unhealthy air or long-term pollution exposure in Stevenson Ranch?
Stevenson Ranch recorded 0% unhealthy days, showing a lack of frequent pollution spikes. Its B grade and 7.1 PM2.5 mean indicate a generally clean and stable atmosphere.
Is air quality in Stevenson Ranch improving or getting worse over time?
The air quality in Stevenson Ranch is currently stable. Recent data shows a neutral trend with no significant shifts in particulate levels.
Does air quality vary across different parts of Stevenson Ranch?
Air quality can vary within the city due to local traffic, industry, and location patterns. Residents should be aware that local topographical features can also influence how air circulates in different areas.