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Friday Forecast:

HPA
Alert: Ozone and PM10 High Pollution Advisories in effect for Friday |  Health Impacts >
Notice
Notice: Blowing dust in the evening.

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

110 AQI
24-hr Avg: 174 µg/m3

PM2.5

74 AQI
24-hr Avg: 21.5 µg/m3

Saturday Forecast:


Ozone

100 AQI
Max 8-hr Avg: 70 ppb

PM10

88 AQI
24-hr Avg: 129 µg/m3

PM2.5

60 AQI
24-hr Avg: 14.1 µg/m3

Sunday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

60 AQI
24-hr Avg: 74 µg/m3

PM2.5

54 AQI
24-hr Avg: 10.6 µg/m3

Monday Forecast:


Ozone

87 AQI
Max 8-hr Avg: 66 ppb

PM10

59 AQI
24-hr Avg: 72 µg/m3

PM2.5

51 AQI
24-hr Avg: 9.1 µg/m3

Tuesday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

52 AQI
24-hr Avg: 58 µg/m3

PM2.5

47 AQI
24-hr Avg: 8.4 µg/m3

Air Quality By Pollutant:

Pollutant
Friday
8/7/2026
Saturday
8/8/2026
Sunday
8/9/2026
Monday
8/10/2026
Tuesday
8/11/2026
O3
101
100
84
87
84
PM10
110
88
60
59
52
PM2.5
74
60
54
51
47
Pollutant
FRI
SAT
SUN
MON
TUE
O3
101
100
84
87
84
PM10
110
88
60
59
52
PM2.5
74
60
54
51
47
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns


Forecast Discussion:

Thunderstorm activity is expected to makes its presence felt tonight for the Greater Phoenix area - primarily in the form of outflow winds and not as much in the way of rainfall. With the winds, will be varying amounts of blowing dust. It is anticipated that there will be enough of a late evening spike in the PM10 levels to raise the 24 hour average into the Unhealthy for Sensitive Groups category. Thus, a High Pollution Advisory is in effect for today. Of note, PM10 concentrations are not expected to get as high as we've seen a couple of times this week. Daily thunderstorm activity is expected to continue over the typically favored areas of northern, eastern, and southeastern Arizona Saturday through Tuesday. As a result, there will be ongoing potential for blowing dust. Uncertainties in how the thunderstorm winds will play out reduces confidence in the details and in turn confidence in how high any short lived spikes will be. For now, the forecast daily average PM10 values Saturday through Tuesday will remain in the Moderate category (instead of Good). Daily average PM2.5 values will follow a similar pattern.

Peak 8 hour average Ozone today is anticipated to reach the Unhealthy for Sensitive Groups category and so a High Pollution Advisory is in effect. Conditions Saturday are expected to get very close to that same threshold but stay just below. Ozone early next week is anticipated to remain in the upper Moderate category due largely to the time of year. If one or more of those days winds up having prolonged cloud cover, Ozone build up won't get as high.

- A. Jamison
ADEQ Meteorologist


What Flag Should I Fly?

Saturday: Yellow
Air Quality chart showing the air quality to be Yellow for Moderate for this specific time or day. Moderate air quality may be a health concern for those who are unusually sensitive to air pollution.
Sunday: Yellow
Air Quality chart showing the air quality to be Yellow for Moderate for this specific time or day. Moderate air quality may be a health concern for those who are unusually sensitive to air pollution.

Ozone and Your Health

People most vulnerable to the impacts of air pollution include children, older adults, adults exercising outdoors, people with heart or lung disease, and those suffering from asthma and bronchitis. Exposure to ozone can increase the number and severity of asthma attacks, cause or aggravate bronchitis or other lung disease, and reduce the body's ability to fight infection. Symptoms may include itchy eyes, nose and throat, wheezing, coughing, shortness of breath, chest pain, and upper respiratory issues | View Ozone Fact Sheet >

Please help reduce ozone by doing one or more of the following:

  • Drive as little as possible, carpool, use public transit or telecommute
  • Re-fuel your vehicle in the evening
  • Avoid waiting in long drive-thru lines, if possible
  • Use low-VOC (Volatile Organic Compounds) or water-based paints, stains, finishes and paint strippers - 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

Particulate Matter and Your Health - PM10 (Dust) and PM2.5 (Smoke)

People most vulnerable to the impacts of air pollution include children, older adults, adults exercising outdoors, people with heart or lung disease, and those suffering from asthma and bronchitis. Exposure to particulate matter can increase the number and severity of asthma attacks, cause or aggravate bronchitis or other lung disease, and reduce the body's ability to fight infection. Symptoms may include itchy eyes, nose and throat, wheezing, coughing, shortness of breath, chest pain and upper respiratory issues. The size of particles is directly linked to their potential for causing health problems. Small particles of concern include "fine particles" (such as those found in smoke and haze), which are 2.5 microns or less in size; and "coarse particles" (such as those found in wind-blown dust), which have diameters between 2.5 and 10 microns. These small particles, some much smaller in diameter than a human hair, pose the greatest problems because they can get deep into your lungs, and some may even get into your bloodstream | View ADEQ Particulate Matter Fact Sheet >

  • Use gas or electric instead of burning wood
  • Limit the lighting of fireworks
  • Ride transit, carpool or telework
  • Eliminate all unnecessary driving and/or combine trips
  • Avoid dirt roads
  • Avoid the use of leaf blowers
  • If burning wood for heat or food preparation, use dry wood (burning wet wood releases more particulate matter)