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_20190525_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 17:00 MST
87
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
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 87 Moderate
Particles (PM10) 18 Good
Particles (PM2.5) 16 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
54
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
65
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Ozone
54
Moderate
Particles (PM10)
31
Good
Particles (PM2.5)
27
Good
Ozone
49
Good
Particles (PM10)
65
Moderate
Particles (PM2.5)
23
Good
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
Today and Saturday, a trough of low pressure will sit just off the coast of the Baja Peninsula. This weather pattern will result into a southerly flow over Arizona and therefore, warmer temperatures in the Valley. Highs will climb into the upper 80s today, and may crest in the low 90s on Saturday. Then on Sunday, another low pressure storm system will dive southwestward into Arizona and result in breezy and gusty wind conditions for much of the day. This system will also bring in another shot of cooler air, making for a very pleasant Memorial Day (Monday). The weather will quiet down again on Tuesday.

In terms of air quality, ozone is expected to be its highest of this forecast period today; stagnant atmospheric conditions will be favorable for ozone accumulation. Then, Saturday through Monday, winds are expected to help limit ozone levels, stunting overall accumulation. Ozone may even fall into the Good Air Quality Index (AQI) category on Saturday with the stronger winds. By Tuesday, weather conditions are looking to be favorable for ozone accumulation again.

Regarding PM10 (dust), the main focus is Sunday, on which blowing dust may be possible because of the stronger winds. Moreover, haze may be possible Monday morning as dust could be transported into the Valley from the west overnight. But PM10 levels should improve later in the day.

M. Graves
http://azdeq.gov/phoenix/forecast
Last Update: Friday, May 24, 2019, 9:39 AM
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