U.S. Air Quality Warning: Complete List of Impacted Regions

This past weekend, the New York State Department of Environmental Conservation (DEC) issued an air quality health advisory that affects large parts of Upstate New York. While not the first of its kind this year, similar alerts are expected to recur.

The warning, effective through Sunday evening, centers on fine particulate matter (PM2.5)—microscopic particles capable of penetrating deep into lungs and the circulatory system, enhancing risks for asthma, heart attacks, and other respiratory and cardiovascular conditions. Several counties have recorded an Air Quality Index (AQI) surpassing 100, marking a level where air quality becomes unsafe for certain populations.

Regions Under the Alert

The advisory covers diverse areas, including urban hubs like Monroe and Erie counties, alongside more rural zones such as Cattaraugus, Lewis, and the Adirondack Mountains. Altogether, over a dozen counties across Western, Central, and Northern New York are affected.

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Such advisories are becoming increasingly frequent during summer months, particularly when atmospheric conditions trap pollutants near the ground, or when wildfire smoke from other North American regions drifts eastward. The DEC attributes the current warning to “raised levels of fine particulate pollution,” with the possibility of ongoing fluctuations depending on weather patterns.

New-York-covered-in-haze-from-Canadian-forest-fires-in-2023-f754968e411aab3a23a414fc61c1e38c.jpg — New York blanketed in smoke haze due to Canadian wildfires in 2023. Credit: Shutterstock

Understanding Why AQI Matters

An AQI exceeding 100 may not immediately raise alarms, especially when the sky appears clear. However, the primary concern lies in what remains invisible. PM2.5 particles are about 1/30th the diameter of a human hair, invisible to the naked eye, yet their health impacts are well-established.

A 2022 investigation from the Harvard T.H. Chan School of Public Health connected prolonged exposure to PM2.5 with heightened risks of death, cognitive impairments, and even mental health challenges. Those most vulnerable include:

Children, due to developing lungs
Senior citizens
Individuals with asthma, COPD, or cardiovascular illnesses

The New York State Department of Health advises minimizing outdoor activities, especially vigorous exercise. They recommend “limiting time spent outdoors” and “watching for symptoms closely.”

How to Stay Updated on Air Conditions

Residents in impacted counties can easily monitor air quality. The DEC provides a live Air Quality Index tracker at (dec.ny.gov), offering current AQI data along with pollutant specifics. For wider scope monitoring, fire.airnow.gov offers dynamic maps refreshed continuously.

Those without internet can call the Air Quality Hotline at 1-800-535-1345 for updates by phone.

Various mobile apps, including Plume Labs, IQAir, and the EPA’s AirNow, send air quality alerts based on GPS location. If AQI rises above 100, users will receive notifications on precautionary measures.

Implications on a Larger Scale

The repeated air quality warnings across New York are part of a broader trend. The American Lung Association’s 2024 State of the Air report indicates eight New York counties failed on short-term particle pollution. These conditions stem from a complex interplay of climate change, smoke crossing borders from wildfires, and industrial pollution.

Experts at Columbia University’s Lamont-Doherty Earth Observatory predict an increase in high-AQI days ahead. Rising temperatures and extended droughts in Canada and western U.S. contribute to longer wildfire seasons, pushing more smoke toward the Northeast.

Health officials emphasize remaining vigilant but not alarmed. Most individuals may continue normal routines, but taking basic precautions—especially for sensitive groups—can safeguard long-term health.