This map shows how smoke is covering much of the US, with Colorado being located beneath the cluster of yellow dots left of the 'United States' label. Image Credit: AirNow.gov.

This map shows how smoke is covering much of the US, with Colorado being located beneath the cluster of yellow dots left of the 'United States' label. Image Credit: AirNow.gov.

On the morning of Wednesday, September 8, Colorado is home to some of the worst air quality in the world.

According to IQAir, Denver is currently ranked as having the 7th worst air in the world (at 10 AM MT) among major cities, with the list topped by Krasnoyarsk, Russia.

UPDATE: Later in the day, Denver hit a 5th-place ranking. Kabul rose to 1st on the list with a score of 163.

This high ranking is due to Denver's US AQI score of 128, which lands the city in the "unhealthy for sensitive groups" range. A thick haze can be seen – a smog and wildfire smoke, which is mostly from out-of-state.

As a result of the poor air quality, much of the state is under an air quality alert. Those with non-ZEV vehicles are asked to reduce driving.

Stay up-to-date with air quality alerts on the National Weather Service website.

Director of Content and Operations

Spencer McKee is OutThere Colorado's Director of Content and Operations. In his spare time, Spencer loves to hike, rock climb, and trail run. He's on a mission to summit all 58 of Colorado's fourteeners and has already climbed more than half.

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(1) comment

Frank T

7th worst air quality in the world is very misleading! The annual rating for Denver from the same source is ranked 2575 in the world. All these towns in California are much worse

# CITY US AQI

1 Lewiston, California 427

2 Weaverville, California 376

3 Fort Jones, California 268

4 Shasta Lake, California 237

5 Shady Cove, Oregon 227

6 Redding, California 218

7 Hayfork, California 214

8 Shasta, California 208

9 Siskiyou, California 202

10 Altamont, Oregon 200

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