Air Quality Trends Reports

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NOACA issues yearly reports to present information on air quality trends in Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina, Portage, and Summit counties for the six criteria pollutants: carbon monoxide, lead, nitrogen dioxide, ozone, particulate matter, and sulfur dioxide. View the reports here.

Air Quality Trends Reports:

2024 Air Quality Trends Report (April 2025)
2023 Air Quality Trends Report (April 2024)
2022 Air Quality Trends Report (March 2023)
2021 Air Quality Trends Report (March 2022)
2020 Air Quality Trends Report (March 2021)
2019 Air Quality Trends Report (April 2020)
2018 Air Quality Trends Report (April 2019)
- Visual Information Card
2017 Air Quality Trends Report (December 2017)
2016 Air Quality Trends Report (April 2017)

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