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U.S. Non-Attainment Areas for ozone pollution in June 2007. In United States environmental law, a non-attainment area is an area that exceeds pollution limits for one or more criteria pollutants: ozone (O 3), atmospheric particulate matter (PM 2.5 /PM 10), lead (Pb), carbon monoxide (CO), sulfur oxides (SO x), and nitrogen oxides (NO x). [1]
Higher air temperatures also lead to higher levels of ground-level ozone and fine particles suspended in the air. These types of particles trigger asthma attacks. Additionally, changing climate in Illinois will change the types of allergens that are present in the air.
Lead (Pb): In the mid-1970s, lead was listed as a criteria air pollutant that required NAAQS regulation. In 1977, the EPA published a document which detailed the Air Quality Criteria for lead. This document was based on the scientific assessments of lead at the time.
The presence of lead pipes has persisted due in part to a lack of a centralized federal or state removal strategy. Illinois has thousands of lead water pipes. Why is it taking so long to replace them?
The U.S. has a measurement system for air quality called the air quality index (AQI). The AQI has six color-coded categories with a value system that runs from zero to 500.
These monitors help ensure air quality standards are met and also provide important data for studying pollution trends. The information shows significant improvements in air quality over recent decades. From 1980 to 2019, levels of carbon monoxide, lead, and sulfur dioxide dropped by over 80%, and particulate matter also decreased substantially.
A woman jogs with a dog along the Hudson River shortly after sunrise, as haze and smoke caused by wildfires in Canada hang over the Manhattan skyline, in New York City, New York, U.S., June 7, 2023.
Looking down from the Hollywood Hills, with Griffith Observatory on the hill in the foreground, air pollution is visible in downtown Los Angeles on a late afternoon.. Air pollution is the introduction of chemicals, particulate matter, or biological materials into the atmosphere that cause harm or discomfort to humans or other living organisms, or damage ecosystems.