The AQHI, or Air Quality Health Index, indicates the level of pollution in a community. A rating of 1-3 is low risk, 4-6 is moderate risk, 7-10 is high risk and over 10 is very high risk.

Columbus' air quality is once again expected to become unhealthy for sensitive groups on June 12 due to smoke and ozone production, according to the Mid-Ohio Regional Planning Commission.

BUFFALO, N.Y. — Once again, an Air Quality Alert has been issued for Western New York until Sunday night. The alert runs until 11:59 p.m. Sunday and includes the entire region: Erie, Niagara ...

RELATED VIDEO (From June 6, 2025) Environment Canada has issued a special air quality statement for most of Ontario as wildfire smoke blows over the province. And according to an international air ...

Dhaka, the overcrowded capital city of Bangladesh, has ranked 22nd on the list of cities with the worst air quality with an AQI score of 72 at 10:15am on Sunday. Dhaka’s air was classified as ...

A new law was hailed as a win for Wasatch Front air quality. But it's not yet clear whether it will lead to any additional, independent monitoring near US Magnesium.

The index, which measures air quality in relation to quality of health, rates it between one and 10. Toronto's skyline is blanketed by smoke on Friday stemming from wildfires in the Prairies.

Delaware, Franklin, Licking, and Fairfield under air quality alert due to rising ozone levels Thursday. Sensitive groups advised to take precautions.

PITTSBURGH — Southwestern Pennsylvania will be under a Code Orange Air Quality Action Day for ozone on Thursday. Officials say hazy sunshine through low-level Canadian wildfire smoke, high ...

PHILADELPHIA (WPVI) -- The National Weather Service has declared an "Orange" air quality alert in the Philadelphia metro area and several New Jersey counties for Thursday. In Pennsylvania, Bucks ...

As a result, the Northeast Ohio Areawide Coordinating Agency has issued an air quality advisory on Tuesday for Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina, Portage and Summit counties. Air ...

The Canadian wildfires have forced tens of thousands to evacuate their homes, while large swaths of the United States have had to contend with moderate to unhealthy air quality over recent weeks ...