Air Quality Index (Aqi)

PA is under code PurpleAir quality alert for Fri.

Digest more

· 16h

These cities are under code purple, maroon for bad air quality

Air quality continues to worsen across the Northeast and Midwest as more than 800 Canadian wildfires rage on.

· 5h · on MSN

Maryland upgrades air quality alert to code purple for Friday

· 6h

Pittsburgh air quality triggers Code Purple alert from wildfires

Wolverines Wire · 5h

What is Code Purple? See air quality map for Pennsylvania

The Pennsylvania Department of Environmental Protection has declared a Code Purple Air Quality Alert across the commonwealth for Friday, July 17.

· 2h

Pittsburgh's air quality considered "very unhealthy" on Friday, several closings and cancellations in place

· 1d

See air quality map as wildfire smoke reaches Pennsylvania

Axios · 10h

Canadian wildfire smoke triggers Code Purple alert in Pittsburgh

All residents should avoid long or intense outdoor activities during Code Purple alerts, per DEP.

· 22h

Pa. declares Code Purple air quality alert statewide as Lehigh Valley reaches ‘hazardous’ levels

· 6h

Outdoor attractions across Central PA close Friday due to poor air quality

Chicago air quality worst in world

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· 2h · on MSN

Smoke from Canadian wildfires pushes Columbus air quality to worst-ever record

Smoke from Canadian wildfires has resulted in the worst air quality index in the Columbus area since the Mid-Ohio Regional Planning Commission began keeping records in 1999.

· 2h · on MSN

Smoke starts to clear as Detroit air quality still worst in world again

· 2h · on MSN

Chicago smoke closes beaches for second day, air quality expected to improve as day goes on

· 10h

Chicago air quality remains at hazardous levels from Canadian wildfire smoke

An Air Quality Alert remains in effect for the Chicago area Friday due to smoke from Canadian wildfires.

· 16h

Chicago ranks as worst air quality for major cities worldwide, wildfire smoke impacts outdoor events

· 23h

MAP: Track the worst air quality across Chicagoland

· 1d

Chicago's air quality is among the worst in the country today—here's why

By this morning, Chicago's Air Quality Index (AQI) had climbed into the "unhealthy" category, with readings around 180 in parts of the city.

· 1d

Wildfire smoke creating "unhealthy" air quality for majority of the Inland Northwest

· 1d

Residents asked to reduce prolonged outdoor activities with Air Quality Alert in effect through Thursday

WCMH Columbus on MSN

Columbus shatters air quality index record

COLUMBUS, Ohio (WCMH) — Columbus shattered its air quality index record on Friday morning as smoke from wildfires in Canada blanketed the area. The AQI on Friday morning reached 554 at 6 a.m. at Finland Elementary School on the city’s southwest side,

What is the Air Quality Index?

With smoke from Canadian wildfires triggering air quality alerts across the Midwest, millions of people in cities like Chicago, Detroit and Milwaukee are becoming intimately familiar with the Air

Will the Cubs-Twins Game Be Played Today? Monitoring the Air Quality Index (AQI) in Chicago as Dangerous Wildfires Persist

Scary times in the Northeastern portion of the United States as Canadian Wildfires continue to bring dangerous smoke and debris into states like Illinois, Massachusetts, Pennsylvania, and New York. It’s already affected one MLB game (Phillies-Mets) on Thursday,

51mon MSN

Will Morgan Wallen cancel his Baltimore show because of air quality?

Baltimore's Air Quality Index was rated at 170, a code red, as of 3:30 p.m. ET on July 17. Will Morgan Wallen cancel his concert in the city?

3hon MSN

Air quality impacts Columbus high school sports, see cancellations

Hazardous air quality from Canadian wildfires is forcing Columbus high schools to cancel or move sporting events.

AOL

Is the Air Quality Index enough? What the AQI can — and can't — tell you about how healthy the atmosphere is.

After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free skies this week. The Air Quality Index (AQI) — which measures the concentration of pollutants in the air — seemed to confirm all ...

Why air quality matters. How breathing smoky air compares to smoking cigarettes

Wildfire smoke is causing unhealthy air quality across Ohio. Alerts remain in effect until midnight on Friday.

10hon MSN

Michigan air quality map, latest AQI readings: Check if it's bad in your area

This map tracks air quality in Michigan. Zoom out to see more areas. Smoke from wildfires in Canada and Minnesota continue to linger over the state.