US AQI guide
AQI 51–100: Moderate
Air quality is acceptable. People who are unusually sensitive to air pollution may feel effects with long or heavy exertion outdoors.
Who is at risk
People who are unusually sensitive to air pollution, such as some people with asthma.
What to do at AQI 51–100
Walking and commuting
Go aheadFine for everyone.
Running and jogging
Take careFine for most; unusually sensitive people should ease the pace.
Cycling
Go aheadFine for everyone.
Children playing outside
Go aheadNo limits for most children.
Older adults and heart or lung conditions
Take careWatch for symptoms such as coughing or breathlessness.
Open windows
Go aheadFine to ventilate.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededOptional.
Based on the US EPA Air Quality Guide, applied to the current US AQI category. If you have symptoms, follow your doctor's advice.
At home, school and work
- Ventilate as usual.
- If you are very sensitive, keep a reliever inhaler handy outdoors.
On other scales
When PM2.5 drives the reading (9 to 35 µg/m³), this is Good or Satisfactory on India's NAQI, which is far more lenient at this level. China's MEE index uses the same breakpoints as the US for its headline number but different pollutant tables, so values are usually lower.
Cities at AQI 51–100 right now
US AQI- NandedIndia100
- JindIndia99
- San DiegoUnited States99
- ClevelandUnited States99
- JinzhongChina99
- ChifengChina99
- JiaxingChina99
- WuzhongChina99
- JakartaIndonesia99
- MexicaliMexico99
- AbujaNigeria99
- AgraIndia98
Show 48 more cities
- AhmednagarIndia98
- AlwarIndia98
- ParbhaniIndia98
- BinzhouChina98
- HezeChina98
- XiangtanChina98
- SurabayaIndonesia98
- SharjahUnited Arab Emirates98
- AjmanUnited Arab Emirates98
- Umm Al QuwainUnited Arab Emirates98
- BharatpurIndia97
- ByasanagarIndia97
- DholpurIndia97
- NagaurIndia97
- Pimpri-ChinchwadIndia97
- RajkotIndia97
- RatlamIndia97
- YongzhouChina97
- YulinChina97
- AnantapurIndia96
- BaghpatIndia96
- MangurahaIndia96
- MathuraIndia96
- SonipatIndia96
- Liwa OasisUnited Arab Emirates96
- KanchanaburiThailand96
- Port HarcourtNigeria96
- IslamabadPakistan96
- KyivUkraine96
- RawalpindiPakistan96
- AsansolIndia95
- DharwadIndia95
- MeerutIndia95
- SirsaIndia95
- BaojiChina95
- Kota BontangIndonesia95
- Kota ProbolinggoIndonesia95
- YogyakartaIndonesia95
- KrakówPoland95
- AlmatyKazakhstan95
- HyderabadIndia94
- Navi MumbaiIndia94
- PatnaIndia94
- VapiIndia94
- YadgirIndia94
- HandanChina94
- ZhengzhouChina94
- HebiChina94
And 506 more.
Frequently asked questions
Is it safe to run outside at AQI 76?
Fine for most; unusually sensitive people should ease the pace.
Can children play outside at AQI 76?
No limits for most children.
Should I wear a mask at AQI 76?
Not needed.
Who is at risk at AQI 51 to 100?
People who are unusually sensitive to air pollution, such as some people with asthma.
What is AQI 51 to 100 on India's scale?
When PM2.5 drives the reading (9 to 35 µg/m³), this is Good or Satisfactory on India's NAQI, which is far more lenient at this level.