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_20181217_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 7:00 MST
102
Unhealthy for Sensitive Groups
Health Message: The following groups should reduce prolonged or heavy outdoor exertion: People with heart or lung disease, Children and older adults. Everyone else should limit 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 40 Good
Particles (PM10) 102 Unhealthy for Sensitive Groups
Particles (PM2.5) 90 Moderate
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
63
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Air Quality Index (AQI)
64
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Carbon Monoxide
20
Good
Ozone
39
Good
Particles (PM10)
51
Moderate
Particles (PM2.5)
63
Moderate
Carbon Monoxide
20
Good
Ozone
40
Good
Particles (PM10)
52
Moderate
Particles (PM2.5)
64
Moderate
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
Clouds have already begun to move over Arizona from the west this morning. Cloud cover looks to be possible through the weekend and on Monday as well. Skies should then clear out more on Tuesday as high pressure begins to build over the region. In general, light winds and stagnant conditions are expected each day through at least Tuesday. Also, high temperatures will be their warmest--low 70s--Saturday and Sunday.

Air quality-wise, not much is expected to change from what we have been seeing lately. Stagnant conditions will be favorable for accumulation of PM10 (dust) and PM2.5 (smoke, soot) in the morning and overnight hours, but mainly PM2.5. As a result, PM2.5 is expected to finish in the Moderate Air Quality Index (AQI) category each day of this forecast period. PM10 will also have the potential to reach the Moderate category, but more so on weekdays.

Locations south and southwest of the Phoenix metro area will have the greatest potential at seeing Moderate AQI levels for either pollutant. But locations elsewhere around the Valley could also see Moderate PM2.5 levels over the weekend.

The main concern, however, is Saturday night into Sunday. Last Sunday (12/9), PM2.5 exceeded the federal health standard, primarily because of high PM2.5 levels in the morning. Whether or not a similar outcome will happen this weekend is uncertain, but forecast hourly PM2.5 levels on Sunday have been increased to account for the possibility of higher levels.

M. Graves
http://azdeq.gov/phoenix/forecast
Last Update: Friday, December 14, 2018, 9:37 AM
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