Grand Junction, CO
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.
Grand Junction, CO air quality summary: Grand Junction, CO, maintains a clean air score of 88.8 and a grade of A based on its annual PM2.5 mean of 4.9 µg/m³. These long-term metrics provide a baseline for evaluating the atmospheric conditions of the local environment. Grand Junction has an annual PM2.5 mean of 4.9 µg/m³, which represents relatively low long-term particulate exposure. Air quality in Grand Junction has been showing limited or modest change based on available long-term monitoring data.
Clean Air Score
The clean air score of 88.8 and grade of A reflect the city's long-term air quality relative to established standards. These metrics help residents understand typical particulate levels encountered over several years of living in Grand Junction.
🏡 What This Means for Buying
Air quality should be treated as one factor in a broader relocation or housing decision for those considering a home in Grand Junction. These metrics provide a neutral baseline for evaluating the environmental context of a potential property investment.
Indoor Air Quality in Grand Junction, CO
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 Grand Junction.
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 Grand Junction:
- 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 Grand Junction Homes:
🩺 My Health Risk Assessment
See how Grand Junction'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, Grand Junction'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.
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Why Grand Junction earned a 88.8
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
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% | 100 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 88.2 |
| 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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Grand Junction Air Quality FAQs
Is Grand Junction a good fit for people who care about long-term air quality?
Grand Junction has a clean air score of 88.8 and a grade of A, with an annual PM2.5 mean of 4.9 µg/m³. These long-term metrics suggest that the city's air quality is consistent with relatively low long-term particulate exposure over time.
What is the frequency of unhealthy air or long-term pollution exposure in Grand Junction?
In Grand Junction, 0% of days recorded unhealthy air levels, contributing to a grade of A and a PM2.5 annual mean of 4.9 µg/m³. This frequency illustrates the typical balance between clear and polluted days in the area.
Is air quality in Grand Junction improving or getting worse over time?
Long-term air quality in Grand Junction has been showing limited or modest change.
Are there specific neighborhoods in Grand Junction with better air quality?
Air quality patterns can be examined at a more granular level by viewing neighborhood or ZIP-level details for Grand Junction.