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The Houston-Pasadena region rose one spot, and is now ranked No. 6 out of 226 metropolitan areas for its number of high ozone days, according to the 2026 State of the Air report released by the American Lung Association on April 21.
Looking back: The region was ranked No. 7 in 2025, Community Impact previously reported. Between 2022-24, the Houston region’s annual weighted average of high ozone days was 43.3, according to the report.
Some context: Ozone air pollution, aka smog, is a lung irritant and can cause health problems, such as chest tightness, coughing and shortness of breath, according to the ALA.
What else: With regard to annual particle pollution, the Houston-Pasadena area ranked No. 8 out of 211 metropolitan areas. The region also ranked No. 89 out of 224 metropolitan areas for 24-hour particle pollution, according to the report.
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