Air Quality Across the U.S.
Current AQI from 1,931 monitors · Measured 10/27/2026, 2:00 AM PT
- Monitors reporting
- 1,931
- Good (0-50)
- 1,623
- Above 100
- 7
- Unhealthy for some or all
- Highest AQI
- 131
- Unhealthy for Sensitive Groups
Air quality by state
Shaded by the highest current AQI at any monitor in the state
- Missouri28 monitorsAQI 129
- Idaho21 monitorsAQI 121
- Indiana40 monitorsAQI 110
- Kentucky24 monitorsAQI 97
- Ohio60 monitorsAQI 93
- California164 monitorsAQI 90
- Pennsylvania55 monitorsAQI 85
- Arizona60 monitorsAQI 74
- Illinois39 monitorsAQI 74
- Tennessee32 monitorsAQI 73
- Arkansas5 monitorsAQI 72
- Mississippi10 monitorsAQI 71
- Alaska6 monitorsAQI 70
- Georgia23 monitorsAQI 66
- North Carolina44 monitorsAQI 66
- Delaware9 monitorsAQI 65
- New Jersey19 monitorsAQI 65
- Hawaii8 monitorsAQI 63
- Oklahoma17 monitorsAQI 62
- Montana14 monitorsAQI 61
- Oregon36 monitorsAQI 61
- South Carolina14 monitorsAQI 61
- Iowa17 monitorsAQI 60
- New York34 monitorsAQI 60
- Washington59 monitorsAQI 60
- Alabama19 monitorsAQI 59
- West Virginia10 monitorsAQI 58
- Maryland19 monitorsAQI 57
- Texas86 monitorsAQI 56
- Nebraska6 monitorsAQI 55
- Florida63 monitorsAQI 54
- Louisiana23 monitorsAQI 53
- Connecticut9 monitorsAQI 52
- District of Columbia4 monitorsAQI 52
- Utah22 monitorsAQI 52
- New Mexico26 monitorsAQI 51
- Nevada29 monitorsAQI 48
- Virginia22 monitorsAQI 48
- Colorado31 monitorsAQI 44
- Massachusetts17 monitorsAQI 44
- Michigan36 monitorsAQI 44
- Rhode Island4 monitorsAQI 44
- Wyoming18 monitorsAQI 43
- Wisconsin16 monitorsAQI 34
- South Dakota7 monitorsAQI 31
- Maine10 monitorsAQI 29
- Minnesota30 monitorsAQI 28
- North Dakota8 monitorsAQI 26
- New Hampshire6 monitorsAQI 25
- Vermont3 monitorsAQI 21
Highest readings right now
Monitors with the worst current AQI
- 131Kitimat RiverlodgeUnhealthy for Sensitive Groups · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 129Branch Street, MOUnhealthy for Sensitive Groups · Coarse particles (PM10) · Tue 10/27/2026, 4:00 AM CDT
- 121Pinehurst, IDUnhealthy for Sensitive Groups · Fine particles (PM2.5) · Tue 10/27/2026, 2:00 AM MDT
- 110Indpls-Washington Park, INUnhealthy for Sensitive Groups · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 110ValemountUnhealthy for Sensitive Groups · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 104General CoffeeUnhealthy for Sensitive Groups · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 104Kitimat Haul RoadUnhealthy for Sensitive Groups · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 99KITIMAT WHITESAILModerate · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 97NEWTWN, KYModerate · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 97Nogales ITNModerate · Coarse particles (PM10) · Tue 10/27/2026, 4:00 AM EDT
- 94Finland ElemModerate · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 93Fairgrounds, OHModerate · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
- 93Houston FirehallModerate · Fine particles (PM2.5) · Tue 10/27/2026, 3:00 AM EDT
- 90Bakersfield - California Ave, CAModerate · Fine particles (PM2.5) · Tue 10/27/2026, 1:00 AM PDT
- 85Liberty (SAHS), PAModerate · Fine particles (PM2.5) · Tue 10/27/2026, 4:00 AM EDT
What the AQI means
The U.S. Air Quality Index runs from 0 to 500. Higher means more pollution.
- 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.
Each monitor reports separate values for ozone and fine particles (PM2.5), and the AQI shown is the highest of them. Wildfire smoke mostly raises PM2.5; summer afternoons mostly raise ozone.
For long-term exposure to toxic air pollutants, see air toxics cancer risk by county from EPA AirToxScreen.
Frequently asked questions
- What is a good AQI?
- An AQI of 0 to 50 is good and 51 to 100 is moderate. Above 100, air is unhealthy for sensitive groups such as children, older adults and people with heart or lung disease.
- What should I do when the AQI is high?
- Limit time and heavy exercise outdoors, keep windows closed, run air conditioning on recirculate or an air purifier, and consider a N95 mask outside during smoke events.
- Where does this data come from?
- Readings come from EPA's AirNow program, which collects hourly data from state, local and tribal air monitoring agencies. The data are preliminary and can change.
Source: EPA AirNow · Last updated 10/27/2026 · Data are preliminary and subject to change