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_20190721_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 20:00 MST
62
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 58 Moderate
Particles (PM10) 62 Moderate
Particles (PM2.5) 29 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
90
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
84
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
90
Moderate
Particles (PM10)
38
Good
Particles (PM2.5)
26
Good
Ozone
84
Moderate
Particles (PM10)
53
Moderate
Particles (PM2.5)
28
Good
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
Ozone will be the main pollutant of interest for this Phoenix Air Quality Forecast. The good news is that cloud cover over the Valley this morning is expected to help limit ozone levels today. As a result, today's ozone forecast was decreased and the Health Watch is no longer in effect. However, an Ozone Health Watch has been issued for Saturday and Sunday as ozone levels look to have the potential to reach the Air Quality Index (AQI) range of 90-100.

By Monday, a monsoonal high pressure pattern is expected to center itself over the Four Corners region, which is the ideal position for thunderstorms in the Valley. In general, winds will be light during the day and therefore favorable for ozone accumulation. However, cloud cover is currently expected to be a limiting factor. For now, ozone is forecast just below the Health Watch range Monday and Tuesday, but this could change.

Back to thunderstorms--Monday and Tuesday look like they could be active thunderstorm days for the Valley. This also implies the potential for blowing dust or a dust storm ahead of the thunderstorms. Though not currently reflected in the PM10 (dust) forecast, if confidence increases for a dust storm, the PM10 forecast could dramatically change next week. For now, PM10 is forecast in the Moderate AQI category on weekdays to account for local activity southwest of the Phoenix metro area.

M. Graves
http://azdeq.gov/phoenix/forecast
Last Update: Friday, July 19, 2019, 9:48 AM
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