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_20180814_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 12:00 MST
51
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 51 Moderate
Particles (PM10) 30 Good
Particles (PM2.5) 37 Good
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
97
Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
105
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
AQI - Pollutant Details
Carbon Monoxide
7
Good
Ozone
97
Moderate
Particles (PM10)
62
Moderate
Particles (PM2.5)
46
Good
Carbon Monoxide
7
Good
Ozone
105
Unhealthy for Sensitive Groups
Particles (PM10)
68
Moderate
Particles (PM2.5)
50
Good
Forecast Discussion: The ozone streak continues as two monitors yesterday (Queen Valley and Tonto National Monument) exceeded the federal health standard making it eight days in a row. From 1974 to 2017 we average ten ozone exceedances in August each year, and so far this month we already have 11 exceedances and the month is not even half over.

So, what is in store for the rest of this week? To say the least, an interesting weather pattern is developing across the southwestern portion of the United States. Today/tomorrow, high pressure will move southeast from the Four Corners into New Mexico resulting in an increased southeast flow importing moisture back into the state. At the same time, a disturbance will move north/northwest through the state. This disturbance combined with the added moisture will result in thunderstorm chances increasing this evening through tomorrow in Phoenix. The main threat will first be gusty winds resulting in blowing dust followed by any storms that form producing very heavy rain.

With that said, am raising PM10 concentrations this evening into tomorrow morning and again tomorrow afternoon to account for the risk of blowing dust. As for ozone, a Health Watch is in place for today, and for tomorrow the big question will be how much cloud cover will be present. Right now, going with clearing skies by mid-morning before storm chances increase once again during the evening hours. As a result, ozone will have time to quickly rise in the afternoon meaning an Ozone High Pollution Advisory will be in effect tomorrow.

For Thursday into the first part of the weekend, the monsoon ridge will move through Arizona and center itself over Calfironia resulting in a drier northwest flow which will mean increasing temperatures, decreasing storm chances and light winds. This will be a classic pattern to allow ozone to remain elevated, so an Ozone High Pollution Advisory will be possible Thursday through Saturday.

–M. Pace
http://www.azdeq.gov/forecasting
Last Update: Tuesday, August 14, 2018, 9:12 AM
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