US AQI guide
AQI 0–50: Good
Air quality is satisfactory and poses little or no risk.
Who is at risk
Nobody needs to change plans.
What to do at AQI 0–50
Walking and commuting
Go aheadEnjoy it.
Running and jogging
Go aheadA great time to run outdoors.
Cycling
Go aheadRide freely.
Children playing outside
Go aheadNo limits.
Older adults and heart or lung conditions
Go aheadNo limits.
Open windows
Go aheadAir out your home.
Mask outdoors
Not neededNot needed.
Air purifier indoors
Not neededNot needed.
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
- Open the windows and air out your home.
On other scales
When PM2.5 drives the reading (up to 9 µg/m³), this is Good on India's NAQI too. 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 0–50 right now
US AQI- JiujiangChina50
- ShanweiChina50
- BandungIndonesia50
- AizawlIndia49
- Salt Lake CityUnited States49
- SeattleUnited States49
- AustinUnited States49
- XiamenChina49
- San JoseUnited States48
- SacramentoUnited States48
- LouisvilleUnited States48
- Baton RougeUnited States48
Show 48 more cities
- Lake CharlesUnited States48
- Pleasure Ridge ParkUnited States48
- DarbhangaIndia47
- MiddletownUnited States47
- Lewiston OrchardsUnited States47
- BaichengChina47
- ChumphonThailand47
- JacksonvilleUnited States46
- College StationUnited States46
- PutianChina46
- Kabupaten Sumba TimurIndonesia46
- KrabiThailand46
- DaytonUnited States45
- KunmingChina45
- Port ArthurUnited States44
- ChangzhiChina44
- ChongzuoChina44
- ChanthaburiThailand44
- YasothonThailand44
- LimbangMalaysia44
- ReedleyUnited States43
- TielingChina43
- HuanggangChina43
- Washington, D.C.United States42
- Fort WayneUnited States42
- SuzhouChina42
- ShreveportUnited States41
- Palm BayUnited States41
- ButteUnited States41
- BazhongChina41
- Oklahoma CityUnited States40
- Fort LauderdaleUnited States40
- Coeur d'AleneUnited States40
- AmaravatiIndia39
- OmahaUnited States39
- Las VegasUnited States39
- TulsaUnited States39
- WorcesterUnited States39
- YakimaUnited States39
- HulunbuirChina39
- UlanhotChina39
- PanjinChina39
- NanjingChina39
- WenzhouChina39
- HechiChina39
- SurakartaIndonesia39
- NashvilleUnited States38
- MiamiUnited States38
And 300 more.
Frequently asked questions
Is it safe to run outside at AQI 25?
A great time to run outdoors.
Can children play outside at AQI 25?
No limits.
Should I wear a mask at AQI 25?
Not needed.
Who is at risk at AQI 0 to 50?
Nobody needs to change plans.
What is AQI 0 to 50 on India's scale?
When PM2.5 drives the reading (up to 9 µg/m³), this is Good on India's NAQI too.