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Wednesday Forecast:

HPA
Alert: Ozone and PM10 High Pollution Advisories in effect for Wednesday |  Health Impacts >

Ozone

101 AQI
Max 8-hr Avg: 71 ppb

PM10

101 AQI
24-hr Avg: 155 µg/m3

PM2.5

62 AQI
24-hr Avg: 15.1 µg/m3

Thursday Forecast:


Ozone

90 AQI
Max 8-hr Avg: 67 ppb

PM10

70 AQI
24-hr Avg: 94 µg/m3

PM2.5

53 AQI
24-hr Avg: 10.1 µg/m3

Friday Forecast:


Ozone

58 AQI
Max 8-hr Avg: 57 ppb

PM10

25 AQI
24-hr Avg: 27 µg/m3

PM2.5

18 AQI
24-hr Avg: 3.3 µg/m3

Saturday Forecast:


Ozone

51 AQI
Max 8-hr Avg: 55 ppb

PM10

30 AQI
24-hr Avg: 32 µg/m3

PM2.5

21 AQI
24-hr Avg: 3.7 µg/m3

Sunday Forecast:


Ozone

54 AQI
Max 8-hr Avg: 56 ppb

PM10

32 AQI
24-hr Avg: 35 µg/m3

PM2.5

19 AQI
24-hr Avg: 3.5 µg/m3

Air Quality By Pollutant:

Pollutant
Wednesday
7/15/2026
Thursday
7/16/2026
Friday
7/17/2026
Saturday
7/18/2026
Sunday
7/19/2026
O3
101
90
58
51
54
PM10
101
70
25
30
32
PM2.5
62
53
18
21
19
Pollutant
WED
THU
FRI
SAT
SUN
O3
101
90
58
51
54
PM10
101
70
25
30
32
PM2.5
62
53
18
21
19
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns


Forecast Discussion:

Yesterday, the peak 8 hour average Ozone value reached the Unhealthy for Sensitive Groups (USG) category. That is expected once again today. Thus, a High Pollution Advisory for Ozone is in effect today. Conditions are anticipated to improve to the upper Moderate range Thursday (close to the threshold for USG) with additional improvement Friday. But, if there is a lack of cloud cover, ozone could climb higher than forecast.

As for Particulates, strong winds and scattered thunderstorms are expected to affect West Pinal County later today and again Thursday. The winds are expected to produce blowing dust with a short lived spike both evenings. The winds are expected to be just strong enough today to warrant a High Pollution Advisory for PM10. Thursday's thunderstorm winds are not anticipated to be quite as strong. Plus, some rainfall may help stabilize the soils and thus the 24 hour average PM10 is not anticipated to be quite as high. Even better conditions are anticipated Friday with a subtle upward trend over the weekend. PM2.5 will follow a similar pattern.

- 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

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)