Tucson Area Forecast
AQI Scale
Air Quality ISSUED ON: Wed. Sep 20, 2017
This report is updated Monday through Friday and is valid for areas within and bordering Tucson, Arizona
Today | Wednesday 9/20/2017
53
PM10
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.
Tomorrow | Thursday 9/21/2017
51
PM10
MessageHealth Statement:Unusually sensitive people should consider reducing prolonged outdoor exertion.
Extended | Friday 9/22/2017
39
PM10
MessageHealth Statement:No health impacts are expected.
Extended | Saturday 9/23/2017
37
PM10
MessageHealth Statement:No health impacts are expected.
Extended | Sunday 9/24/2017
39
PM10
MessageHealth Statement:No health impacts are expected.

Air Pollutant Breakdown
Pollutant Yesterday
9/19/2017
Wednesday
9/20/2017
Thursday
9/21/2017
Friday
9/22/2017
Saturday
9/23/2017
Sunday
9/24/2017
O3 31 33 28 29 30 31
PM10 55 53 51 39 37 39
O3 = Ozone, PM10 = Particles 10 microns and smaller

Synopsis & Discussion
Forecaster: -P. Patel
While ozone continues to remain in low, PM-10 finally jumped back into the Moderates. Although, it is worth noting that this was due to isolated activity at the Rillito monitor. All the other PM-10 monitors in the region reported concentrations well in the Good range. Moving forward, a frontal passage will occur over the next 24-hours, increasing surface winds to 15-20 mph with gusts even higher. As a result of this increased mixing, ozone will continue to fall even more. However, PM-10 will be a different story since the concern for localized blowing dust increases due to gusty winds. So, expect PM-10 to be a little higher than what we've seen over the past few days.

Check back tomorrow for more. Until then, have a good day!
Useful Links
- Pima County Department of Environmental Quality
- Subcribe to the Forecast
- Yesterday's Monitor Data
- Read current issue of "Cracking the AQ Code"


Main Office
1110 W.Washington Street
Phoenix, AZ 85007
P: 602.771.2300
azdeq.gov