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Air quality · China

Chongqing Air Quality Index (AQI) today

Modelled estimate for 21:00 local time (UTC+8), refreshed 3 Nov, 07:52 UTC+0.

173 Unhealthy

Live estimate · modelled

US EPA AQI21:00 UTC+8, 3 Nov Main pollutant: PM2.5

Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.

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 89 around 16:00 to 202 around 21:00 (4 Nov).

31st most polluted of 849 cities worldwide right now, 4th of 25 in China.

What to do today

  • Long walk or run outside Shorten it, take breaks
  • Kids playing outside Limit it
  • Airing the house Open briefly
  • Mask outdoors N95 if outside for long

Based on the US EPA’s health statement: “Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.” General guidance, not medical advice.

Last 24 hours and next 48

Past hours Forecast

22:00 · 145 23:00 · 139 00:00 · 137 01:00 · 134 02:00 · 130 03:00 · 123 04:00 · 115 05:00 · 109 06:00 · 104 07:00 · 106 08:00 · 112 09:00 · 116 10:00 · 119 11:00 · 118 12:00 · 117 13:00 · 118 14:00 · 119 15:00 · 122 16:00 · 124 17:00 · 127 18:00 · 147 19:00 · 160 20:00 · 169 21:00 · 173 22:00 · 175 23:00 · 173 00:00 · 170 01:00 · 165 02:00 · 160 03:00 · 155 04:00 · 152 05:00 · 143 06:00 · 140 07:00 · 151 08:00 · 158 09:00 · 156 10:00 · 150 11:00 · 136 12:00 · 122 13:00 · 110 14:00 · 98 15:00 · 93 16:00 · 89 17:00 · 89 18:00 · 126 19:00 · 163 20:00 · 184 21:00 · 202 22:00 · 212 23:00 · 211 00:00 · 199 01:00 · 192 02:00 · 187 03:00 · 184 04:00 · 181 05:00 · 177 06:00 · 174 07:00 · 174 08:00 · 176 09:00 · 172 10:00 · 168 11:00 · 166 12:00 · 162 13:00 · 157 14:00 · 155 15:00 · 154 Now

US EPA AQI per hour, UTC+8. 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 22:00145
Mon 23:00139
Tue 00:00137
Tue 01:00134
Tue 02:00130
Tue 03:00123
Tue 04:00115
Tue 05:00109
Tue 06:00104
Tue 07:00106
Tue 08:00112
Tue 09:00116
Tue 10:00119
Tue 11:00118
Tue 12:00117
Tue 13:00118
Tue 14:00119
Tue 15:00122
Tue 16:00124
Tue 17:00127
Tue 18:00147
Tue 19:00160
Tue 20:00169
Tue 21:00 · Now173
Tue 22:00 · Forecast175
Tue 23:00 · Forecast173
Wed 00:00 · Forecast170
Wed 01:00 · Forecast165
Wed 02:00 · Forecast160
Wed 03:00 · Forecast155
Wed 04:00 · Forecast152
Wed 05:00 · Forecast143
Wed 06:00 · Forecast140
Wed 07:00 · Forecast151
Wed 08:00 · Forecast158
Wed 09:00 · Forecast156
Wed 10:00 · Forecast150
Wed 11:00 · Forecast136
Wed 12:00 · Forecast122
Wed 13:00 · Forecast110
Wed 14:00 · Forecast98
Wed 15:00 · Forecast93
Wed 16:00 · Forecast89
Wed 17:00 · Forecast89
Wed 18:00 · Forecast126
Wed 19:00 · Forecast163
Wed 20:00 · Forecast184
Wed 21:00 · Forecast202
Wed 22:00 · Forecast212
Wed 23:00 · Forecast211
Thu 00:00 · Forecast199
Thu 01:00 · Forecast192
Thu 02:00 · Forecast187
Thu 03:00 · Forecast184
Thu 04:00 · Forecast181
Thu 05:00 · Forecast177
Thu 06:00 · Forecast174
Thu 07:00 · Forecast174
Thu 08:00 · Forecast176
Thu 09:00 · Forecast172
Thu 10:00 · Forecast168
Thu 11:00 · Forecast166
Thu 12:00 · Forecast162
Thu 13:00 · Forecast157
Thu 14:00 · Forecast155
Thu 15:00 · Forecast154

Pollutants this hour

  • PM2.5 94.1 µg/m³ 24-hour mean 50.4 µg/m³ · 3.4× WHO’s 24-hour guideline (15) 173
  • PM10 95 µg/m³ 67
  • O₃ 0 µg/m³ 1
  • NO₂ 64 µg/m³ 32
  • SO₂ 30 µg/m³ 16
  • CO 1.13 mg/m³ 8

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
Chengdu Sichuan 155
Xi’an Shaanxi 225
Kunming Yunnan 54
Wuhan Hubei 148
Nanning Guangxi 72
Zhengzhou Henan 107
Wuzhong Ningxia 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 Chongqing’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 Chongqing right now?
173 on the US EPA scale (Unhealthy) at 21:00 UTC+8, 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 Chongqing today?
Consider shortening outdoor exercise; sensitive groups should move it indoors. The EPA’s statement for “Unhealthy”: Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. General guidance, not medical advice.

Will the air in Chongqing get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 89 around 16:00 to 202 around 21:00 (4 Nov). Forecasts beyond a day are less certain.

How does Chongqing compare with other cities?
Right now it is the 31st most polluted of 849 cities we track worldwide, and 4th of 25 in China, all on the same US EPA scale.

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