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Air quality · Chittagong, Bangladesh

Comilla Air Quality Index (AQI) today

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

129 Unhealthy for sensitive groups

Live estimate · modelled

US EPA AQI18:00 UTC+6, 3 Nov Main pollutant: O₃

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 137.

Over the next 24 hours the model expects the AQI to range from 100 around 13:00 to 162 around 23:00 (3 Nov).

136th most polluted of 849 cities worldwide right now, 5th 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 · 125 20:00 · 138 21:00 · 147 22:00 · 152 23:00 · 154 00:00 · 156 01:00 · 156 02:00 · 155 03:00 · 154 04:00 · 153 05:00 · 153 06:00 · 152 07:00 · 152 08:00 · 150 09:00 · 138 10:00 · 124 11:00 · 114 12:00 · 109 13:00 · 106 14:00 · 105 15:00 · 115 16:00 · 129 17:00 · 136 18:00 · 129 19:00 · 137 20:00 · 154 21:00 · 159 22:00 · 161 23:00 · 162 00:00 · 161 01:00 · 160 02:00 · 158 03:00 · 157 04:00 · 156 05:00 · 155 06:00 · 155 07:00 · 154 08:00 · 150 09:00 · 134 10:00 · 122 11:00 · 113 12:00 · 106 13:00 · 100 14:00 · 112 15:00 · 136 16:00 · 151 17:00 · 154 18:00 · 150 19:00 · 136 20:00 · 115 21:00 · 109 22:00 · 110 23:00 · 111 00:00 · 112 01:00 · 115 02:00 · 119 03:00 · 124 04:00 · 131 05:00 · 139 06:00 · 151 07:00 · 157 08:00 · 157 09:00 · 155 10:00 · 149 11:00 · 131 12:00 · 118 13:00 · 111 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 19:00125
Mon 20:00138
Mon 21:00147
Mon 22:00152
Mon 23:00154
Tue 00:00156
Tue 01:00156
Tue 02:00155
Tue 03:00154
Tue 04:00153
Tue 05:00153
Tue 06:00152
Tue 07:00152
Tue 08:00150
Tue 09:00138
Tue 10:00124
Tue 11:00114
Tue 12:00109
Tue 13:00106
Tue 14:00105
Tue 15:00115
Tue 16:00129
Tue 17:00136
Tue 18:00 · Now129
Tue 19:00 · Forecast137
Tue 20:00 · Forecast154
Tue 21:00 · Forecast159
Tue 22:00 · Forecast161
Tue 23:00 · Forecast162
Wed 00:00 · Forecast161
Wed 01:00 · Forecast160
Wed 02:00 · Forecast158
Wed 03:00 · Forecast157
Wed 04:00 · Forecast156
Wed 05:00 · Forecast155
Wed 06:00 · Forecast155
Wed 07:00 · Forecast154
Wed 08:00 · Forecast150
Wed 09:00 · Forecast134
Wed 10:00 · Forecast122
Wed 11:00 · Forecast113
Wed 12:00 · Forecast106
Wed 13:00 · Forecast100
Wed 14:00 · Forecast112
Wed 15:00 · Forecast136
Wed 16:00 · Forecast151
Wed 17:00 · Forecast154
Wed 18:00 · Forecast150
Wed 19:00 · Forecast136
Wed 20:00 · Forecast115
Wed 21:00 · Forecast109
Wed 22:00 · Forecast110
Wed 23:00 · Forecast111
Thu 00:00 · Forecast112
Thu 01:00 · Forecast115
Thu 02:00 · Forecast119
Thu 03:00 · Forecast124
Thu 04:00 · Forecast131
Thu 05:00 · Forecast139
Thu 06:00 · Forecast151
Thu 07:00 · Forecast157
Thu 08:00 · Forecast157
Thu 09:00 · Forecast155
Thu 10:00 · Forecast149
Thu 11:00 · Forecast131
Thu 12:00 · Forecast118
Thu 13:00 · Forecast111

Pollutants this hour

  • PM2.5 50.2 µg/m³ 24-hour mean 50.0 µg/m³ · 3.3× WHO’s 24-hour guideline (15) 120
  • PM10 51 µg/m³ 41
  • O₃ 110 µg/m³ 129
  • NO₂ 21 µg/m³ 10
  • SO₂ 14 µg/m³ 7
  • CO 0.52 mg/m³ 3

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
Dhaka Dhaka Division 151
Gazipur Dhaka Division 132
Chattogram Chittagong 112
Khulna Khulna Division 153
Rajshahi Rajshahi Division 152
Rangpur Rangpur Division 116
Mandalay Myanmar 61
Kolkata India 83

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 Comilla’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 Comilla right now?
129 on the US EPA scale (Unhealthy for sensitive groups) at 18:00 UTC+6, 3 Nov. O₃ 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 Comilla 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 Comilla get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 100 around 13:00 to 162 around 23:00 (3 Nov). Forecasts beyond a day are less certain.

How does Comilla compare with other cities?
Right now it is the 136th most polluted of 849 cities we track worldwide, and 5th of 7 in Bangladesh, all on the same US EPA scale.

Why does another app show a different AQI for Comilla?
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.