The Colorado Department of Public Health and Environment issued its fourth ozone action alert since the start of June [1].
These alerts signal a need for immediate public action to reduce pollutants that contribute to smog. High ozone levels can trigger respiratory issues and exacerbate asthma, making the air potentially unhealthy for sensitive groups and the general public.
State health officials issued the alert on Tuesday, June 4, 2024 [3], after meteorologists tracked ozone levels ranging from moderate to unhealthy [1]. This marks the fourth such alert within a two-week span [2].
To combat the rising ozone levels, the CDPHE advised residents to cut emissions during the midday hours. Officials said that people should avoid unnecessary car trips and refrain from using gas-powered lawn mowers [1]. These activities release volatile organic compounds and nitrogen oxides, which react in sunlight to create ground-level ozone.
While the primary focus of the alert remained on Colorado, similar air quality concerns were reported elsewhere. An air quality alert was also issued across eastern Wisconsin on June 4, 2024 [3].
Health officials said that reducing the use of combustion engines during peak heat and sunlight helps prevent the further buildup of ozone in the atmosphere. The frequency of these alerts, four in just 14 days, highlights a period of significant atmospheric instability and poor air quality in the region [2].
“The Colorado Department of Public Health and Environment issued its fourth ozone action alert since the start of June.”
The rapid succession of ozone alerts in Colorado suggests a pattern of stagnant weather conditions and high temperatures that trap pollutants. When ground-level ozone reaches 'unhealthy' thresholds, it indicates that the local environment cannot disperse emissions quickly enough, necessitating behavioral changes from the population to prevent a public health crisis.
