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_20190425_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 0:00 MST
77
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 77 Moderate
Particles (PM10) 35 Good
Particles (PM2.5) 47 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)
87
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
101
Unhealthy for Sensitive Groups
Particles (PM10)
52
Moderate
Particles (PM2.5)
26
Good
Ozone
87
Moderate
Particles (PM10)
52
Moderate
Particles (PM2.5)
25
Good
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
The wave of low pressure that brought cloud cover and breezes to the Valley yesterday has moved on to the east, and high pressure will begin to takes its place today. Then by tomorrow (Thursday), the high pressure will be well situated over the Southwest. The main concern of this air quality forecast will be increasing ozone today and tomorrow because of the said high pressure. Today, an Ozone Health Watch is in effect as ozone levels are forecast to approach the federal health standard. For tomorrow, an Ozone High Pollution Advisory has been issued as ozone levels are expected to have the potential to exceed the standard.

On Friday and Saturday, the high pressure pattern will weaken due to stronger winds expected to move over Arizona, but ozone is still forecast to be elevated. Then on Sunday, ozone levels are forecast to decrease as another low pressure system approaches Arizona from the Pacific Ocean.

In regards to PM10 (dust), areas southwest of the Phoenix metro area will likely continue to see the highest levels of PM10 during the week, which may reach the Moderate Air Quality Index (AQI) category. Elsewhere around the Valley, however, should easily see PM10 remain in the Good AQI category.

M. Graves
http://azdeq.gov/phoenix/forecast
Last Update: Wednesday, April 24, 2019, 9:33 AM
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