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What is Ozone Pollution

Ozone pollution is a concern in the warmer months of April through September. Ground-level ozone is formed by a chemical reaction that needs heat from sunlight, nitrogen oxides, and volatile organic compounds (VOCs). Ozone High Pollution Advisories are issued when the highest concentration of ozone pollution may approach the federal health standard.

Tips Restrictions Toolkit


  Tips to reduce ozone pollution

  • Drive less. When possible, telework, walk, ride a bike, carpool, vanpool, or use public transportation.

  • Avoid waiting in long drive-thru lines. Park your car and walk inside at coffee shops, fast-food restaurants, and banks.

  • Fuel your vehicle after dark (or during cooler, evening hours).



During an Ozone High Pollution Advisory, employees and contractors of government entities are prohibited from operating leaf blowers. Wood burning in residential fireplaces, chimineas, outdoor fire pits, and similar outdoor fires is also restricted. This includes individuals and businesses which have burn permits for open burning and wood burning fires at hotels and restaurants. Access additional information on air quality restrictions »

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      Page reviewed 29 September 2023