Denver under Ozone Action Day Alert, sensitive groups advised to limit outdoor activities

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Denver under Ozone Action Day Alert, sensitive groups advised to limit outdoor activities

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Denver is under an Ozone Action Day Alert until 4 pm today due to elevated ground-level ozone concentrations. Ozone levels are expected to reach the Unhealthy for Sensitive Groups category, particularly during the afternoon hours when sunny and hot conditions persist. The highest ozone readings are forecast along the lower foothills of the Front Range and in sections of southern Larimer and Weld Counties, but the Denver Metro area is also impacted. The most recent monitoring shows the ozone Air Quality Index at 77, indicating moderate air quality but rising into the less healthy range for sensitive groups as the day progresses[1][2][5].

People with respiratory issues such as asthma, active children, and adults are advised to limit prolonged or heavy outdoor activities between noon and 8 pm. Even those who are unusually sensitive to ozone should consider reducing exertion. Exposure to elevated ozone can cause respiratory discomfort and exacerbate existing lung conditions. The general public is encouraged to help reduce ozone formation by limiting the use of gas and diesel-powered vehicles during the day[1][5].

Particulate matter (PM2.5) levels remain in the Good category, with an Air Quality Index reading of 49. This means particulate pollution is not a concern today for Denver residents. Carbon monoxide and nitrogen dioxide concentrations are also rated as Good across the metro area. Visibility is expected to range from Good to Moderate[1][3].

Denver’s air quality today is shaped largely by rising ozone levels during peak sunlight and heat. While particulate pollution remains minimal, sensitive groups should take precautions as ground-level ozone can pose health risks. Keeping outdoor activity to a minimum during high ozone periods and reducing emissions can help improve conditions throughout the day[1][3][5].