Bloomington, IL
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.
Bloomington, IL air quality summary: Bloomington, IL, maintains a clean air score of 81.2 and a B grade, with an annual PM2.5 mean of 6.4. These ratings indicate a stable and generally favorable air quality environment for the local community. The annual PM2.5 mean in Bloomington is 6.4, which is considered moderate or acceptable but still relevant for long-term exposure. Long-term air quality in Bloomington has been improving over recent years.
Clean Air Score
A clean air score of 81.2 and a B grade signify that Bloomington's air quality is within acceptable national standards. These ratings reflect long-term particulate levels that are well within ranges considered suitable for residential environments.
🏡 What This Means for Buying
Air quality is a positive factor to consider as part of any housing or relocation assessment in Bloomington. A B grade suggests that the local environment is a stable and favorable aspect of the city's profile.
Indoor Air Quality in Bloomington, IL
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 Bloomington.
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 Bloomington:
- 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 Bloomington Homes:
🩺 My Health Risk Assessment
See how Bloomington'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, Bloomington's air quality improved by 2.6 μg/m³. Based on NBER studies, this change correlates with a estimated 10.4% increase in relative property value retention.
Cleaner Alternatives in IL
Why Bloomington earned a 81.2
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% | 79.5 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 63 |
| Seasonal Variability | 10% | 94.4 |
| 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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Bloomington Air Quality FAQs
Is Bloomington a good fit for people who care about long-term air quality?
Bloomington holds a clean air score of 81.2 and a B grade, with an annual PM2.5 mean of 6.4. These figures suggest a generally favorable environment for individuals Focused on long-term air quality.
What is the frequency of unhealthy air or long-term pollution exposure in Bloomington?
Bloomington reports 0% unhealthy air days according to current records. This, in conjunction with its B grade and 6.4 PM2.5 mean, indicates that acute pollution exposure is uncommon.
Is air quality in Bloomington improving or getting worse over time?
Air quality in Bloomington has shown an improving trend over recent years. This reflects a positive shift in long-term particulate concentrations for the community.
Does air quality vary within the city of Bloomington?
Air quality can vary within Bloomington due to factors such as local traffic patterns, proximity to agricultural or industrial sources, and geography. While the city-wide grade is positive, residents may experience slight variations in air quality depending on their specific location.