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No.

Federal health and safety authorities have not approved N95 or any other disposable face mask for protection against ozone. 

Though some mask models like Moldex advertise a carbon layer insert to help filter “nuisance” level ozone, these have not been approved by federal authorities. 3M, a face mask manufacturer, found no definitive evidence the company’s disposable face masks protected against nuisance-level ozone during internal testing.

Surface-level ozone forms when two types of air pollutants, volatile organic compounds and nitrogen oxides, react with each other.

Colorado’s ozone levels are higher than normal this year, with the state’s nine-county ozone nonattainment area already seeing 51 days above the federal ozone limit as of Aug. 5. Last year, that area surpassed federal limits on 23 days.

Exposure to ground-level ozone can lead to respiratory issues like throat inflammation and difficulty breathing.

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Sources

Type of Story: Fact-Check

Checks a specific statement or set of statements asserted as fact.

Cassis Tingley is a Denver-based freelance journalist. She’s spent the last three years covering topics ranging from political organizing and death doulas in the Denver community to academic freedom and administrative accountability at the University of Denver, where she earned her bachelor’s in journalism and international studies in 2024. Her...