Phoenix
 
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AQI Forecast - http://www.epa.gov/airnow/today/forecast_aqi_20140801_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.
 - http://www.epa.gov/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 Animation - http://www.epa.gov/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: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) 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

AirNow.gov is undergoing maintenance. Updates for the forecasts and current conditions are not available between midnight and 4 am EST.

Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
64 
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Data Not Available
AQI - Pollutant Details
Ozone
64 
Moderate
Particles (PM10)
50 
Good
Particles (PM2.5)
38 
Good
Carbon Monoxide
Good
Data Not Available
Forecast Discussion: There's a lot to talk about today. Forecast models expect monsoon activity to pick up today through the weekend. The greatest threat of dust comes Thursday night. A couple local models differ a bit as to the strength of outflow from storms to the south. One completely denies the chance for competing outflow from the north that would cancel the south outflow's impact. If dust occurs, it appears that the western part of the forecast area (Buckeye). Friday and Saturday has the flow out of the east and northeast. Dust is not a threat from this direction. Storms from this part of of the state are more electrical in nature, so lightning shows are likely Friday and Saturday. Rain is still spotty at best. Longer-range models suggest that Sunday will be the day for heavy showers. Phoenix could see over an inch of rain. Some upslope locations could receive more. How does this affect air quality? Increased cloud cover will help hold ozone formation down Friday through Sunday. Thus, Friday's Ozone Health Watch will be allowed to expire with no further extension or escalation. PM-10 concentrations could reach the middle Moderate range Friday, again mainly in the west part of the forecast area. Concentrations should be much lower heading into the weekend as the flow turns out of the more vegetated east and northeast. Temperatures will also slide from a high near 110°F Thursday, to 102°F Saturday, and possibly only reaching 95°F on Sunday under cloudy, rainy conditions. This is going to be a fun weekend! Check back on Friday for a closer look at the weekend's weather and air quality. Until then, have a good day! -J.Paul

Current Conditions
Data Not Available

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