Where is the air worst in Arizona right now?

Humboldt Mountain - Tonto N.F. has the highest current reading at AQI 34 (Good).

How often are readings updated?

Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.

Something wrong? Let us know

Arizona Air Quality

Current AQI at 64 monitors, highest 34 (Good) · Measured 10/31/2026, 3:00 AM PT

Monitors: 64
Highest AQI: 34; Good
Typical (median): 18; Good
Above 100: 0

Monitoring sites in Arizona

Worst first. Times are local.

34Humboldt Mountain - Tonto N.F.Good · Ozone · Sat 10/31/2026, 2:00 AM MST
34Prescott Pioneer ParkGood · Ozone · Sat 10/31/2026, 2:00 AM MST
33Queen ValleyGood · Ozone · Sat 10/31/2026, 2:00 AM MST
32CoachlineGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
32Grand Canyon NPGood · Ozone · Sat 10/31/2026, 2:00 AM MST
32Yuma SupersiteGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
31Pinnacle Peak Club HouseGood · Ozone · Sat 10/31/2026, 2:00 AM MST
30GeronimoGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
30Mesa - Brooks ReservoirGood · Ozone · Sat 10/31/2026, 2:00 AM MST
30South ScottsdaleGood · Ozone · Sat 10/31/2026, 2:00 AM MST
29Cave CreekGood · Ozone · Sat 10/31/2026, 2:00 AM MST
29Fountain HillsGood · Ozone · Sat 10/31/2026, 2:00 AM MST
29Phoenix JLG SupersiteGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
28High SchoolGood · Ozone · Sat 10/31/2026, 2:00 AM MST
28Red MountainGood · Ozone · Sat 10/31/2026, 2:00 AM MST
28Saguaro National Park - EastGood · Ozone · Sat 10/31/2026, 2:00 AM MST
27Falcon Field Fire StationGood · Ozone · Sat 10/31/2026, 2:00 AM MST
27West PhoenixGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
26AJ Maintenance YardGood · Ozone · Sat 10/31/2026, 2:00 AM MST
26LEHIGood · Ozone · Sat 10/31/2026, 2:00 AM MST
26Tonto National MonumentGood · Ozone · Sat 10/31/2026, 2:00 AM MST
25TempeGood · Ozone · Sat 10/31/2026, 2:00 AM MST
23Ft McD Yuma Frank-AZGood · Ozone · Sat 10/31/2026, 3:00 AM MST
22Alamo LakeGood · Ozone · Sat 10/31/2026, 2:00 AM MST
22Nogales Post OfficeGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
20BuckeyeGood · Ozone · Sat 10/31/2026, 2:00 AM MST
19Blue Point Sheriff Sub-stationGood · Ozone · Sat 10/31/2026, 2:00 AM MST
19Children's ParkGood · Ozone · Sat 10/31/2026, 2:00 AM MST
19DysartGood · Ozone · Sat 10/31/2026, 2:00 AM MST
19Glendale Community CollegeGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
18Central PhoenixGood · Ozone · Sat 10/31/2026, 2:00 AM MST
18Craycroft & 22nd St.Good · Ozone · Sat 10/31/2026, 2:00 AM MST
18FairgroundsGood · Ozone · Sat 10/31/2026, 2:00 AM MST
18West Chandler Fire StationGood · Ozone · Sat 10/31/2026, 2:00 AM MST
17Apache JunctionGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
17Chiricahua NMGood · Ozone · Sat 10/31/2026, 2:00 AM MST
17Durango ComplexGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
16C GRANDEGood · Ozone · Sat 10/31/2026, 2:00 AM MST
16North PhoenixGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
16TangerineGood · Ozone · Sat 10/31/2026, 2:00 AM MST
15Pinal Air ParkGood · Ozone · Sat 10/31/2026, 2:00 AM MST
12Casa Grande DowntownGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
12Green ValleyGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
10RillitoGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
10StanfieldGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
9EastwoodGood · Fine particles (PM2.5) · Sat 10/31/2026, 2:00 AM MST
9Pinal County HousingGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
8HaydenGood · Coarse particles (PM10) · Sat 10/31/2026, 1:00 AM MST
8HigleyGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
7AjoGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
7Bullhead CityGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
7EloyGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
7Orange GroveGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
7West 43rdGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
6COMBSGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
6Hidden ValleyGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
6Zuni HillsGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
5MaricopaGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
4Miami Golf CourseGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
4South TucsonGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
3Douglas Red CrossGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
3Paul Spur Chemical Lime PlantGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
3Senior CenterGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST
0Payson Well SiteGood · Coarse particles (PM10) · Sat 10/31/2026, 2:00 AM MST

By county

Highest current AQI among the county's monitors

Frequently asked questions

Where is the air worst in Arizona right now?: Humboldt Mountain - Tonto N.F. has the highest current reading at AQI 34 (Good).
How often are readings updated?: Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.

Source: EPA AirNow · Last updated 10/31/2026 · Data are preliminary and subject to change

What the AQI means

0-50Good. Air quality is satisfactory and poses little or no risk.
51-100Moderate. Acceptable. A few unusually sensitive people may have symptoms.
101-150Unhealthy for Sensitive Groups. People with heart or lung disease, older adults, children and teens should limit long or heavy outdoor exertion.
151-200Unhealthy. Everyone may begin to feel effects. Sensitive groups should avoid long or heavy outdoor exertion.
201-300Very Unhealthy. Health alert: the risk of health effects is increased for everyone.
301-500Hazardous. Health warning of emergency conditions. Everyone is more likely to be affected.

Data sources

AirNowU.S. Environmental Protection Agency · Official site

Data as of 10/31/2026

See something wrong? Request a correction

More about Arizona

More national data

About this data

Environmental hazards and flood zones: Flood zones, hazard scores and pollution data come from federal and state agencies and are for general information only. They are not an official flood zone determination, environmental assessment or insurance rating. For a property decision, request an official determination from your community floodplain administrator, insurer or a licensed professional. Maps may not show recent changes.

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

DatenUS is a private website and is not affiliated with or endorsed by any government agency. We republish public data from the sources listed on this page. Data can be incomplete, delayed or wrong. Always check the original source before you make a decision.

Our servers read this data automatically from government sources. Errors can come from the source itself or from the way we read, process or display it, and we do not guarantee that it is accurate, complete or current. Verify anything important with the official source.

Report an error How we check data Read the full disclaimer