ADEQ issues ozone health watch for June 1, high pollution advisory for June 2

The Arizona Department of Environmental Quality has issued a same-day health watch for Wednesday, June 1, and a high pollution advisory for Thursday, June 2, for ozone in Maricopa County.

An ozone health watch means ozone levels are expected to near the federal health standard (an AQI value of 100). Tomorrow – Thursday, June 2 – ozone levels around the Valley are expected to increase with highest ozone levels concentrating in north and northeast portions of the Valley, according to a press release.

Ground level ozone is formed by a chemical reaction that needs sunlight, nitrogen oxides and volatile organic compounds to form, according to the release.

The HPA refers to the highest level of an air pollutant that may exceed the federal health standard.

Employers and Travel Reduction Program transportation coordinators are advised to activate their HPA plans immediately. ADEQ further recommends that the general public limit outdoor activity while the HPA is in effect, especially children and adults with respiratory problems.

ADEQ, Maricopa County Air Quality Department and Valley Metro recommend residents and businesses use the following tips and resources to reduce ozone pollution and make the air healthier to breathe:

  • Drive as little as possible, carpool, use public transit or telecommute.
  • Re-fuel your vehicle after dark.
  • Avoid waiting in long drive-thru lines, for example, at coffee shops, fast-food restaurants or banks. Park your car and go inside.
  • Visit and to plan a transit trip or seek a carpool or vanpool.
  • Use low-volatile organic compounds or water-based paints, stains, finishes and paint strippers and delay big painting projects.
  • Make sure containers of household cleaners, garage and yard chemicals and other solvents are sealed properly to prevent vapors from evaporating into the air.


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