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Larimer County proclaims May 2025 National Clean Air Month after air-quality update and new monitoring plans
Summary
County public health staff briefed commissioners on ozone formation, new grants and monitoring upgrades and announced incentive vouchers for commercial landscaping electrification before the board and Board of Health jointly proclaimed May 2025 as Clean Air Month.
Larimer County health officials on Tuesday updated the Board of County Commissioners on local efforts to cut ground-level ozone and other air pollutants and the board joined the county Board of Health in proclaiming May 2025 National Clean Air Month.
The update focused on the causes of ground-level ozone, monitoring upgrades, grant-funded monitoring and outreach programs, and a commercial landscaping electrification voucher program intended to reduce emissions from gas-powered lawn equipment.
Tom Gonzales, Larimer County public health director, said the primary air-quality challenge is ground-level ozone, formed when nitrogen oxides and volatile organic compounds react in heat and sunlight. "The problem is ground level ozone," Gonzales said, noting that vehicle emissions make up "over 70%" of precursor emissions in the county and that hot days — typically 90 degrees or higher — are strongly correlated with…
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