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Wednesday Forecast:

HPA
Alert: Ozone High Pollution Advisory in effect for Wednesday |  Health Impacts >

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

57 AQI
24-hr Avg: 67 µg/m3

PM2.5

52 AQI
24-hr Avg: 9.7 µg/m3

Thursday Forecast:


Ozone

97 AQI
Max 8-hr Avg: 69 ppb

PM10

54 AQI
24-hr Avg: 61 µg/m3

PM2.5

45 AQI
24-hr Avg: 8.1 µg/m3

Friday Forecast:


Ozone

84 AQI
Max 8-hr Avg: 65 ppb

PM10

48 AQI
24-hr Avg: 52 µg/m3

PM2.5

38 AQI
24-hr Avg: 6.8 µg/m3

Saturday Forecast:


Ozone

44 AQI
Max 8-hr Avg: 48 ppb

PM10

43 AQI
24-hr Avg: 46 µg/m3

PM2.5

30 AQI
24-hr Avg: 5.4 µg/m3

Sunday Forecast:


Ozone

28 AQI
Max 8-hr Avg: 30 ppb

PM10

31 AQI
24-hr Avg: 34 µg/m3

PM2.5

23 AQI
24-hr Avg: 4.2 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
10/7/2026
Thursday
10/8/2026
Friday
10/9/2026
Saturday
10/10/2026
Sunday
10/11/2026
O3
101
97
84
44
28
PM10
57
54
48
43
31
PM2.5
52
45
38
30
23
Pollutant
WED
THU
FRI
SAT
SUN
O3
101
97
84
44
28
PM10
57
54
48
43
31
PM2.5
52
45
38
30
23
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns


Forecast Discussion:

Full sun, light winds, and well above normal temperatures will contribute to peak 8 hour average Ozone reaching into the Unhealthy for Sensitive Groups category today. Thus, a High Pollution Advisory is in effect. Conditions are anticipated to be only slightly better Thursday with Ozone falling just shy of Advisory thresholds. Some additional improvement is anticipated Friday with better ventilation followed by substantially better improvement over the weekend with a lot more cloudiness and breezy to windy conditions (along with rainfall potential).

Daily average PM10 (dust) levels are expected to reach the low Moderate range today and Thursday driven largely by short lived periods in the morning when activities such as construction ramp up before the morning inversion dissipates. An improving trend begins Friday and continues through the weekend with improved ventilation along with the likelihood of rainfall before the weekend is over (most likely on Sunday). Daily average PM2.5 (smoke/combustion particles) will follow a similar trend.

- A. Jamison
ADEQ Meteorologist


What Flag Should I Fly?

Wednesday: Orange
Thursday: 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