Air Quality Alert

AZC013-250400-

Air Quality Alert
Relayed by National Weather Service Phoenix AZ
915 AM MST Thu Jul 23 2026

...OZONE HIGH POLLUTION ADVISORY FOR MARICOPA COUNTY INCLUDING THE
PHOENIX METRO AREA THROUGH FRIDAY...

The Arizona Department of Environmental Quality (ADEQ) has extended
an Ozone High Pollution Advisory for the Phoenix Metro Area through
Friday.

This means that forecast weather conditions combined with existing
ozone levels are expected to result in local maximum 8-hour ozone
concentrations that pose a health risk. Adverse health effects
increase as air quality deteriorates.

Ozone is an air contaminant which can cause breathing difficulties
for children, older adults, as well as persons with respiratory
problems. A decrease in physical activity is recommended.

You are urged to car pool, telecommute or use mass transit.
The use of gasoline-powered equipment should be reduced or done late
in the day.

For details on this High Pollution Advisory, visit the ADEQ internet
site at www.azdeq.gov/forecast/phoenix or call 602-771-2300.

$$

CAZ048-055-061-065-554-240045-
San Bernardino and Riverside County Valleys-The Inland Empire-
San Bernardino County Mountains-Coachella Valley-
San Gorgonio Pass near Banning-Orange County Inland Areas-
Including the cities of Riverside, San Bernardino, Ontario,
Moreno Valley, Fontana, Rancho Cucamonga, Corona, Crestline,
Lake Arrowhead, Big Bear City, Big Bear Lake, Running Springs,
Wrightwood, Indio, Palm Springs, Cathedral City, Palm Desert,
Palm Desert Country, La Quinta, Coachella, Santa Ana, Anaheim,
Garden Grove, Irvine, Orange, Fullerton, and Mission Viejo
541 PM PDT Wed Jul 22 2026

...AIR QUALITY ALERT FOR HARMFUL LEVELS OF OZONE (SMOG) AIR
POLLUTION...

* WHAT...The South Coast AQMD has issued an air quality alert due to
harmful levels of ozone pollution.
Visit https://www.aqmd.gov/alertinfo to check current and forecasted
air quality levels.

* WHERE...in the South Coast Air Basin and Coachella Valley. Levels
of ozone pollution can vary by time and location depending on
emissions and air pollution transport.

* WHEN...until 8 PM Monday. The highest ozone levels typically occur
in the afternoon and early-evening hours.

* IMPACTS... Ozone air pollution can cause serious health problems,
including trouble breathing, asthma attacks, and lung damage.
Everyone can be affected, but sensitive groups such as people with
lung disease, older adults, people who are pregnant, children, and
those who spend a lot of time outdoors are at greater risk.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To protect your health, check air quality levels and act as needed:

    * When Air Quality Index (AQI) levels are "Unhealthy for
      Sensitive Groups" (orange), sensitive groups as specified
      above should limit extended or intense outdoor activity.
    * When AQI is "Unhealthy" (red), everyone may experience health
      impacts. Sensitive groups should avoid extended time outdoors.
    * When AQI is "Very Unhealthy" (purple), sensitive groups should
      avoid all outdoor physical activity. Everyone else should
      avoid extended or intense outdoor activity.
    * When AQI is "Hazardous" (maroon), everyone should avoid all
      outdoor physical activity.

* ADDITIONAL DETAILS...

To help keep indoor air clean when air quality is poor:

    * Keep windows and doors closed
    * Run your air conditioner and/or an air purifier
    * Do not use whole house fans or swamp coolers that bring in
      outside air if you have other methods to stay cool
    * Avoid other sources of pollution such as fireplaces, candles,
      incense, and grilling

To help minimize outdoor ozone air pollution levels:

    * Limit the use of gasoline powered lawn and garden equipment
      until evening hours
    * Try to delay trips to the gas station and the use of household
      chemicals until the evening

$$