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_20200403_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 9:00 MST
70
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 47 Good
Particles (PM10) 70 Moderate
Particles (PM2.5) 47 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
61
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
64
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
61
Moderate
Particles (PM10)
48
Good
Particles (PM2.5)
31
Good
Ozone
64
Moderate
Particles (PM10)
35
Good
Particles (PM2.5)
34
Good
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
Yesterday, ozone finished in the Good Air Quality Index (AQI) category at every monitoring site in the Valley. Decent breezy winds in the early afternoon likely played a role in this.

The main story for this Phoenix air quality forecast will be a relatively strong wave of low pressure that will develop just off the northern coast of California on Sunday and slowly expand into Arizona Monday and Tuesday. This system will primarily bring in cooler air (highs are forecast to drop into the upper 70s by Monday) and stronger winds. Skies are also expected to be mostly sunny as the system will be on the dry side.

For today and Saturday, winds are expected to be light. Therefore, ozone is forecast in the Moderate AQI category. There may even be a chance for some light ozone transport from the west.

Then by Sunday, a deep southerly flow will develop over Arizona, helping to remove the possibility of any transport from the west. This southerly flow will last through at least Tuesday. Additionally, breezy afternoon winds will favor the dispersion of ozone, particularly on Monday and Tuesday. As a result, ozone is forecast in the Good AQI category Sunday through Tuesday.

In regards to particulate matter, both PM10 (dust) and PM2.5 (smoke) are elevated in the usual areas this morning--south/southwest of the Phoenix metro area. This will continue to be possible on any given weekday. Moreover, we can't rule out the possibility of pockets of dust on Monday and/or Tuesday because of the breezy winds.

Check back on Monday for the next Phoenix Air Quality Forecast.

M. Graves
http://azdeq.gov/phoenix/forecast
Last Update: Friday, April 3, 2020, 9:18 AM
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