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Air quality · Chittagong, Bangladesh

Chattogram Air Quality Index (AQI) today

Modelled estimate for 18:00 local time (UTC+6), refreshed 3 Nov, 07:52 UTC+0.

112 Unhealthy for sensitive groups

Live estimate · modelled

US EPA AQI18:00 UTC+6, 3 Nov Main pollutant: PM2.5

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

This page uses EPA’s NowCast, which follows the last few hours, as the US government’s AirNow does. On a 24-hour average of particles, as many apps show, it is 110.

Over the next 24 hours the model expects the AQI to range from 107 around 13:00 to 121 around 22:00 (3 Nov).

160th most polluted of 849 cities worldwide right now, 7th of 7 in Bangladesh.

What to do today

  • Long walk or run outside Shorter if you have asthma or heart disease
  • Kids playing outside OK, less for kids with asthma
  • Airing the house Open
  • Mask outdoors If you are in a sensitive group

Based on the US EPA’s health statement: “Members of sensitive groups may experience health effects. The general public is less likely to be affected.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

19:00 · 85 20:00 · 88 21:00 · 92 22:00 · 96 23:00 · 99 00:00 · 104 01:00 · 109 02:00 · 112 03:00 · 115 04:00 · 117 05:00 · 117 06:00 · 118 07:00 · 121 08:00 · 119 09:00 · 118 10:00 · 117 11:00 · 115 12:00 · 113 13:00 · 111 14:00 · 109 15:00 · 108 16:00 · 108 17:00 · 109 18:00 · 112 19:00 · 115 20:00 · 118 21:00 · 120 22:00 · 121 23:00 · 121 00:00 · 120 01:00 · 119 02:00 · 117 03:00 · 116 04:00 · 114 05:00 · 112 06:00 · 111 07:00 · 111 08:00 · 111 09:00 · 111 10:00 · 110 11:00 · 109 12:00 · 108 13:00 · 107 14:00 · 107 15:00 · 107 16:00 · 115 17:00 · 115 18:00 · 114 19:00 · 118 20:00 · 120 21:00 · 121 22:00 · 120 23:00 · 118 00:00 · 116 01:00 · 112 02:00 · 107 03:00 · 102 04:00 · 98 05:00 · 96 06:00 · 96 07:00 · 97 08:00 · 97 09:00 · 96 10:00 · 96 11:00 · 96 12:00 · 96 13:00 · 96 Now

US EPA AQI per hour, UTC+6. Particles use EPA’s NowCast (a 12-hour weighted average), ozone and CO an 8-hour average. Lighter bars are the CAMS forecast.

Show as a table
TimeAQI
Mon 19:0085
Mon 20:0088
Mon 21:0092
Mon 22:0096
Mon 23:0099
Tue 00:00104
Tue 01:00109
Tue 02:00112
Tue 03:00115
Tue 04:00117
Tue 05:00117
Tue 06:00118
Tue 07:00121
Tue 08:00119
Tue 09:00118
Tue 10:00117
Tue 11:00115
Tue 12:00113
Tue 13:00111
Tue 14:00109
Tue 15:00108
Tue 16:00108
Tue 17:00109
Tue 18:00 · Now112
Tue 19:00 · Forecast115
Tue 20:00 · Forecast118
Tue 21:00 · Forecast120
Tue 22:00 · Forecast121
Tue 23:00 · Forecast121
Wed 00:00 · Forecast120
Wed 01:00 · Forecast119
Wed 02:00 · Forecast117
Wed 03:00 · Forecast116
Wed 04:00 · Forecast114
Wed 05:00 · Forecast112
Wed 06:00 · Forecast111
Wed 07:00 · Forecast111
Wed 08:00 · Forecast111
Wed 09:00 · Forecast111
Wed 10:00 · Forecast110
Wed 11:00 · Forecast109
Wed 12:00 · Forecast108
Wed 13:00 · Forecast107
Wed 14:00 · Forecast107
Wed 15:00 · Forecast107
Wed 16:00 · Forecast115
Wed 17:00 · Forecast115
Wed 18:00 · Forecast114
Wed 19:00 · Forecast118
Wed 20:00 · Forecast120
Wed 21:00 · Forecast121
Wed 22:00 · Forecast120
Wed 23:00 · Forecast118
Thu 00:00 · Forecast116
Thu 01:00 · Forecast112
Thu 02:00 · Forecast107
Thu 03:00 · Forecast102
Thu 04:00 · Forecast98
Thu 05:00 · Forecast96
Thu 06:00 · Forecast96
Thu 07:00 · Forecast97
Thu 08:00 · Forecast97
Thu 09:00 · Forecast96
Thu 10:00 · Forecast96
Thu 11:00 · Forecast96
Thu 12:00 · Forecast96
Thu 13:00 · Forecast96

Pollutants this hour

  • PM2.5 44.4 µg/m³ 24-hour mean 39.2 µg/m³ · 2.6× WHO’s 24-hour guideline (15) 112
  • PM10 45 µg/m³ 37
  • O₃ 88 µg/m³ 93
  • NO₂ 27 µg/m³ 13
  • SO₂ 9 µg/m³ 4
  • CO 0.63 mg/m³ 5

Modelled concentrations at the city’s location (CAMS). The sub-index uses the same averaging as the headline, so the highest one is the AQI.

Nearby cities

City AQI
Comilla Chittagong 129
Dhaka Dhaka Division 151
Gazipur Dhaka Division 132
Khulna Khulna Division 153
Rajshahi Rajshahi Division 152
Mandalay Myanmar 61
Rangpur Rangpur Division 116
Kolkata India 82

Where this number comes from

The Copernicus Atmosphere Monitoring Service (CAMS) forecasts air pollution worldwide on a grid (about 11 km over Europe, about 45 km elsewhere). We take the grid value at Chattogram’s coordinates and score it with the US EPA’s method. It is a model, not a measurement: a nearby monitoring station can read quite differently, especially next to busy roads or during fires and dust storms.

Full methodology · Data: CAMS via Open-Meteo (CC BY 4.0); city list: GeoNames (CC BY 4.0).

  • Good 0–50
  • Moderate 51–100
  • Unhealthy for sensitive groups 101–150
  • Unhealthy 151–200
  • Very unhealthy 201–300
  • Hazardous 301–500

Questions

What is the AQI in Chattogram right now?
112 on the US EPA scale (Unhealthy for sensitive groups) at 18:00 UTC+6, 3 Nov. PM2.5 is the pollutant with the highest sub-index. This is a modelled estimate from the Copernicus Atmosphere Monitoring Service (CAMS), not a reading from a monitoring station.

Is it safe to exercise outside in Chattogram today?
For most people, yes; people with asthma, heart or lung disease, older adults and children should take it easier. The EPA’s statement for “Unhealthy for sensitive groups”: Members of sensitive groups may experience health effects. The general public is less likely to be affected. General guidance, not medical advice.

Will the air in Chattogram get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 107 around 13:00 to 121 around 22:00 (3 Nov). Forecasts beyond a day are less certain.

How does Chattogram compare with other cities?
Right now it is the 160th most polluted of 849 cities we track worldwide, and 7th of 7 in Bangladesh, all on the same US EPA scale.

Why does another app show a different AQI for Chattogram?
Apps differ in source (government stations, low-cost sensors or a model like this one), in scale (US EPA, European, or a national index) and in averaging (hourly or NowCast, 8-hour, 24-hour). This page uses the US EPA AQI with EPA’s NowCast for particles, computed from the CAMS forecast for the city’s location.