US AQI guide
AQI 151–200: Unhealthy
Some members of the general public may feel health effects; sensitive groups may feel more serious effects.
Who is at risk
Everyone, with sensitive groups at greater risk of serious effects.
What to do at AQI 151–200
Walking and commuting
Take careKeep outdoor walks short and choose quieter streets away from traffic.
Running and jogging
AvoidMove your run indoors or reschedule for a cleaner hour.
Cycling
LimitKeep rides short and easy, or ride indoors.
Children playing outside
LimitLimit outdoor play to short, gentle sessions. Move sports indoors.
Older adults and heart or lung conditions
AvoidAvoid exertion outdoors. Follow your doctor's action plan.
Open windows
AvoidKeep windows closed while the air is unhealthy.
Mask outdoors
RecommendedWear a well-fitted N95 or FFP2 mask outdoors. Cloth and surgical masks do little against fine particles.
Air purifier indoors
RecommendedRun a HEPA purifier in the room you spend most time in.
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
- Keep windows closed and run a HEPA air purifier in the room you use most.
- Set the car's air to recirculate.
- Avoid frying, incense, candles and smoking indoors, which add particles.
- Move workouts and children's sports indoors.
On other scales
When PM2.5 drives the reading (55 to 125 µg/m³), this is Satisfactory to Poor on India's NAQI, and often Moderate. 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 151–200 right now
US AQI- KotabaruIndonesia199
- SerembanMalaysia197
- Alor GajahMalaysia196
- BantingMalaysia196
- KlangMalaysia196
- Kuala LumpurMalaysia196
- TangkakMalaysia195
- Johor BahruMalaysia193
- RompinMalaysia193
- Kabupaten Musi RawasIndonesia192
- Batu PahatMalaysia192
- IpohMalaysia192
Show 48 more cities
- KashgarChina188
- Kabupaten SiakIndonesia187
- Indera Mahkota KuantanMalaysia187
- BikanerIndia180
- PrabumulihIndonesia180
- ManadoIndonesia179
- Sri AmanMalaysia179
- PengerangMalaysia177
- HingoliIndia175
- Kabupaten Indragiri HilirIndonesia175
- BahadurgarhIndia174
- Kabupaten Musi BanyuasinIndonesia173
- PittsburghUnited States172
- Kabupaten Kutai KartanegaraIndonesia172
- PesawaranIndonesia172
- BallabgarhIndia171
- IPD SerianMalaysia171
- ChandrapurIndia170
- UdaipurIndia170
- Kabupaten Ogan IlirIndonesia170
- MakassarIndonesia170
- MempawahIndonesia170
- SuakatiIndia169
- Banjar BaruIndonesia168
- ArariaIndia167
- TonkIndia167
- DingzhouChina167
- Kabupaten Padang PariamanIndonesia167
- Seri ManjungMalaysia166
- HoniaraSolomon Islands166
- SagarIndia164
- SorongIndonesia164
- KluangMalaysia164
- Port DicksonMalaysia164
- BarautIndia163
- KotaIndia163
- VatvaIndia163
- Tanjung HarapanIndonesia163
- PakaMalaysia163
- KinshasaDemocratic Republic of the Congo163
- BrazzavilleCongo163
- DhuleIndia161
- BaodingChina161
- Kabupaten NabireIndonesia161
- Greater NoidaIndia160
- RairangpurIndia160
- Yamuna NagarIndia160
- JerantutMalaysia160
And 46 more.
Frequently asked questions
Is it safe to run outside at AQI 176?
Move your run indoors or reschedule for a cleaner hour.
Can children play outside at AQI 176?
Limit outdoor play to short, gentle sessions. Move sports indoors.
Should I wear a mask at AQI 176?
Wear a well-fitted N95 or FFP2 mask outdoors. Cloth and surgical masks do little against fine particles.
Who is at risk at AQI 151 to 200?
Everyone, with sensitive groups at greater risk of serious effects.
What is AQI 151 to 200 on India's scale?
When PM2.5 drives the reading (55 to 125 µg/m³), this is Satisfactory to Poor on India's NAQI, and often Moderate.