Casper, WY
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.
Casper, WY air quality summary: Casper, WY maintains a CleanAirData score of 87.5, resulting in a A grade for long-term air quality. The city's annual mean PM2.5 concentration is measured at 4 µg/m³. In Casper, the annual mean concentration of PM2.5 particles is 4 µg/m³. The long-term trend for air quality in Casper is characterized as worsening over recent years.
Clean Air Score
A CleanAirData score of 87.5 and a A grade reflect relatively low long-term particulate exposure. This assessment provides a baseline for evaluating the local environment over extended periods.
🏡 What This Means for Buying
Air quality should be treated as one factor in a broader relocation or housing decision. Prospective residents may wish to consider how long-term pollution levels align with their personal preferences for environmental conditions.
Indoor Air Quality in Casper, WY
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 Casper.
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 Casper:
- 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 Casper Homes:
🩺 My Health Risk Assessment
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Health Advice
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</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, Casper's air quality worsened by 1.2 μg/m³. Based on NBER studies, this change correlates with a estimated 4.8% decrease in relative property value retention.
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Why Casper earned a 87.5
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% | 100 |
| Unhealthy Days | 25% | 94.5 |
| 5-Year Trend | 20% | 44 |
| Seasonal Variability | 10% | 88.9 |
| 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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Casper Air Quality FAQs
Is Casper a good fit for people who care about long-term air quality?
Casper holds a CleanAirData score of 87.5 and an overall grade of A. With an annual mean PM2.5 level of 4 µg/m³, it represents a relatively low exposure environment.
What is the frequency of unhealthy air or long-term pollution exposure in Casper?
Analysis shows that 0.3% of days in Casper reach unhealthy levels for sensitive groups. This frequency contributes to the city's A grade and annual PM2.5 mean of 4 µg/m³.
Is the air quality in Casper improving or getting worse over time?
Air quality in Casper has been worsening over recent years according to recent multi-year data.
How does air quality vary across different parts of Casper?
Residents can find more granular data by visiting neighborhood or ZIP-level detail pages for Casper. Local factors such as traffic and industry can create variations in air quality within city limits.