Highland Park, 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.
Highland Park, IL air quality summary: Highland Park, IL maintains a Clean Air Score of 73.1 and a grade of B, with an annual PM2.5 mean of 7.6 µg/m³. This data provides a historical overview of the city's long-term air quality environment. Highland Park has an annual PM2.5 mean of 7.6 µg/m³, which represents moderate long-term particulate exposure. Historical data shows that long-term air quality in Highland Park has been improving over recent years.
Clean Air Score
The Clean Air Score of 73.1 and B grade indicate moderate long-term air quality in Highland Park. These figures are derived from chronic particulate exposure levels recorded over several years.
🏡 What This Means for Buying
A B grade in Highland Park offers a factual basis for evaluating long-term atmospheric conditions. Air quality should be considered as one of many factors in a broader residential research effort.
Indoor Air Quality in Highland Park, 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 Highland Park.
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 Highland Park:
- 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 Highland Park Homes:
🩺 My Health Risk Assessment
See how Highland Park'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, Highland Park's air quality improved by 1.2 μg/m³. Based on NBER studies, this change correlates with a estimated 4.8% increase in relative property value retention.
Cleaner Alternatives in IL
Why Highland Park earned a 76.9
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% | 69.2 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 56 |
| Seasonal Variability | 10% | 92.1 |
| 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.
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Highland Park Air Quality FAQs
Is Highland Park a good fit for people who care about long-term air quality?
Highland Park, IL holds a Clean Air Score of 73.1 and a B grade, with an annual PM2.5 mean of 7.6 µg/m³. This profile indicates a moderate long-term air quality baseline for residents.
How often does Highland Park experience unhealthy air frequency?
Highland Park records 0% unhealthy air days, consistent with its B grade and 7.6 µg/m³ annual PM2.5 mean. This suggests that significant pollution events are rare in the historical record.
Is the air quality in Highland Park improving or getting worse over time?
Long-term monitoring in Highland Park suggests that air quality has been improving over recent years.
Does air quality vary within Highland Park?
Air quality within Highland Park can vary based on local traffic, industry, and specific location patterns, as is typical for urbanized areas.