Why this guide matters locally
A documented July 2026 smoke episode
On July 16, 2026, the National Weather Service Chicago office reported that smoke from fires in Ontario and northern Minnesota had descended into northern Illinois, producing unhealthy to hazardous conditions in parts of the region. Smoke conditions are temporary and can shift hour by hour, so this page does not publish a frozen “current AQI.” Use AirNow.gov for the live official reading.
Current hourly outdoor-air check
Live AQI for Tinley Park and nearby southwest suburbs
This EPA AirNow dial shows the latest available outdoor AQI near Tinley Park, along with the pollutant currently driving the reading. Nearby towns can differ, especially around a moving smoke plume, so open AirNow and change the location when you need the closest available report.
What the AQI actually means
The U.S. Air Quality Index is EPA's color-coded way to communicate outdoor air pollution and short-term health concern. The higher the number, the greater the concern. During wildfire episodes, fine particle pollution (PM2.5) is often the pollutant driving the AQI.
AQI can also be driven by ozone or another regulated pollutant. When you check AirNow, look at both the number and the “primary pollutant” instead of assuming every orange or red day is wildfire smoke.
| AQI | Category | Color | General meaning |
|---|---|---|---|
| 0–50 | Good | Green | Air quality is satisfactory for the general public. |
| 51–100 | Moderate | Yellow | Most people can continue normal activity; unusually sensitive people may notice effects. |
| 101–150 | Unhealthy for Sensitive Groups | Orange | People in at-risk groups should follow the current AirNow activity guidance. |
| 151–200 | Unhealthy | Red | Some effects are possible for everyone; at-risk groups may experience more serious effects. |
| 201–300 | Very Unhealthy | Purple | The risk of health effects is increased for everyone. |
| 301+ | Hazardous | Maroon | Emergency conditions: everyone is more likely to be affected. |
This table is a plain-language summary, not personal medical advice. AirNow provides activity guidance for each category and identifies which groups should take extra care.
Practical steps from EPA and CDC
Check, then adjust
- Check AirNow's current NowCast and forecast; smoke can change faster than a daily forecast.
- When guidance calls for it, shorten or reschedule strenuous outdoor activity.
- Pay particular attention if someone is a child, older adult, pregnant, or has heart or lung disease.
- Follow a clinician's existing plan and seek medical help for severe or concerning symptoms.
Make indoor air cleaner
- Keep windows and doors closed while outdoor smoke is high, as long as indoor heat is not becoming dangerous.
- Set central air to recirculate and consider a MERV 13 filter if the system can safely handle it.
- Use a correctly sized portable air cleaner in the room where people spend the most time.
- Avoid adding particles indoors through smoking, candles, aerosol sprays, or heavy frying.
- Air the home out when outdoor conditions improve.
About this community guide
This page is a public-service shortcut to official tools and practical guidance for families in Chicago's south and southwest suburbs, especially during a changing smoke episode.
American Radon Systems does not diagnose illness, provide medical care, sell air purifiers, or remediate wildfire smoke. The information here is summarized from EPA, CDC, AirNow, Illinois agencies, and the National Weather Service; use those agencies for live conditions and individualized public-health guidance.
Official sources and live air-quality tools
Last reviewed by American Radon Systems: July 19, 2026
- AirNow: current air quality and the Fire and Smoke Map
EPA’s official source for current AQI, forecasts, and smoke-monitor information. Check this instead of relying on a number saved on this page.
- EPA: Wildfire Smoke and Health factsheets (2026)
Current federal fact sheets on smoke exposure, at-risk groups, cleaner-air rooms, filtration, pets, and sensors.
- EPA: Using the Air Quality Index
Explains the daily AQI, the current-hour NowCast, covered pollutants, and why the number can change during a smoke event.
- EPA: Strategies to reduce wildfire-smoke exposure indoors
Official guidance on windows, recirculation, HVAC filters, portable air cleaners, cleaner-air rooms, and indoor particle sources.
- CDC: How wildfire smoke affects your body
Health effects, people at increased risk, and when to pay closer attention to symptoms.
- Illinois EPA: Outdoor Air forecasts and Action Days
Current Illinois forecasts, monitoring links, and Air Pollution Action Day information.
- Illinois Department of Public Health: Wildfire Smoke
Illinois-specific public-health information explaining how smoke from Canadian fires can travel into the state and how residents can reduce exposure.
- National Weather Service Chicago: July 16, 2026 smoke discussion
The Chicago/Romeoville office reported smoke from Ontario and northern Minnesota descending into northern Illinois during the documented episode.