Phoenix
 
Data and Forecasts courtesy of:
 

 - https://files.airnowtech.org/airnow/today/cur_aqi_phoenix_az.jpg
 
Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
AQI Forecast - https://files.airnowtech.org/airnow/today/forecast_aqi_20190821_phoenix_az.jpg
 
Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
AQI Animation - https://files.airnowtech.org/airnow/today/anim_aqi_phoenix_az.gif
 
Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
 
AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
Action DayAction Day
 
Local Air Quality Resources
Maricopa County Air Quality Department | Maricopa County Dust Forecast | Today's AQI and Forecast (AZ DEQ)
 
State Air Quality Resources
ADEQ Contact Information
ADEQ Regional Haze and Visibility
American Lung Association (ALA) of Arizona
Arizona Department of Environmental Quality Air Quality Division
Clean Air Make More - Maricopa County
Gila River Indian Community DEQ Air Quality Program
 
Data and Forecasts courtesy of:
Current Conditions
Air Quality Index (AQI)
observed at 12:00 MST
66
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Ozone 64 Moderate
Particles (PM10) 66 Moderate
Particles (PM2.5) 43 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
101
Unhealthy for Sensitive Groups
Health Message: Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy exertion outdoors.
ACTION DAY
Air Quality Index (AQI)
97
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
Actionday icon
101
Unhealthy for Sensitive Groups
Particles (PM10)
54
Moderate
Particles (PM2.5)
32
Good
Ozone
97
Moderate
Particles (PM10)
66
Moderate
Particles (PM2.5)
32
Good
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
Another near ozone exceedance! Tonto National Monument monitor was again the highest at 69 parts per billion (ppb). Second highest was Pinnacle Peak at 66 ppb.

Revisiting the "battlefield" between trough and ridge influence on the Desert Southwest, troughing has been slow to retreat northward, at least for the time being. Winds blowing between 5,000 and 10,000 feet have been breezy and persistent from the west and southwest. This nuance is certainly having a helping hand preventing a buildup of ozone over the metropolitan that would otherwise be available for mixing down during the daytime. Signaling this effect is Humboldt Mountain (that rural high elevation site north of Phoenix). Up on the mountain, higher ozone readings have not been sustaining into the overnight and morning hours. This is good news.

Closer to the surface, though, winds are light and variable until afternoon westerlies kick in. The late morning - early afternoon window of light dispersion in the Valley has given new ozone formation the chance to approach the 70 ppb EPA standard on a daily basis.

The Ozone High Pollution Advisory stands today, however, the forecast takes ozone down below Advisory thresholds tomorrow and going forward. Peak concentrations are kept within Health Watch territory (90-100 AQI). Okay, that covers ozone.

One more thing, it is still monsoon season! There is blowing dust to mention for Thursday afternoon and early evening. Ingredients are coming together for thunderstorms to get close to the city from the south and send gusty outflows our way. Storms in central and southern Arizona can fire up again on Friday. Our latest moment for storm chances is narrow. High pressure is quick to migrate out of the East Pacific this weekend, centering itself over Nevada.

Stay tuned!


J. Malloy
http://azdeq.gov/phoenix/forecast
Last Update: Wednesday, August 21, 2019, 9:24 AM
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