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_20200228_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
41
Good
Health Message: None
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) 41 Good
Particles (PM2.5) 35 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
57
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
Air Quality Index (AQI)
55
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion.
AQI - Pollutant Details
Ozone
38
Good
Particles (PM10)
54
Moderate
Particles (PM2.5)
57
Moderate
Ozone
41
Good
Particles (PM10)
38
Good
Particles (PM2.5)
55
Moderate
Forecast Discussion: [View the ADEQ Hourly Forecast for Phoenix]
After five days in a row of all pollutants (ozone, PM10, and PM2.5) remaining in the Good Air Quality Index (AQI) category, PM10 (dust) and PM2.5 (smoke) finally reached the Moderate AQI category again yesterday. This was because of light winds. The good news is that Moderate AQI levels were constrained to only two monitors, located southwest of the Phoenix metro area.

Today and Saturday, light winds are expected to continue in the morning and overnight hours. These conditions will be favorable for the local build-up of PM10 and PM2.5. PM10 is forecast in the Good AQI category on Saturday though, since it is the weekend (i.e. less local activity).

Then by Sunday, a relatively strong low pressure system from the Pacific Ocean will begin move over Arizona. Sunday is forecast to be a breezy day, with southwest winds of at least 15-20 mph expected in the afternoon. Winds also look to carry over into Monday morning. Air quality-wise, PM2.5 levels should be limited by the winds Sunday into Monday morning.

In the wake of the storm on Monday, there will be a noticeable change in temperatures, with highs in the upper 50s. Light winds will also return. PM10 may have the potential to reach the Moderate AQI category again. On Tuesday, morning temperatures will be their coldest of the week (low 40s), which will be favorable for the local build-up in PM10/PM2.5. Therefore, both pollutants are forecast in the Moderate AQI category.

In general, on days when PM10 or PM2.5 is forecast in the Moderate AQI category, areas south/southwest of the Phoenix metro area will have the greatest likelihood of seeing Moderate levels

Ozone will stay in the Good AQI category.

M. Graves
http://azdeq.gov/phoenix/forecast
Last Update: Friday, February 28, 2020, 8:45 AM
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