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Air quality · Guangdong, China

Guangzhou Air Quality Index (AQI) today

Modelled estimate for 19:00 local time (UTC+8), refreshed 3 Nov, 07:52 UTC+0.

125 Unhealthy for sensitive groups

Live estimate · modelled

US EPA AQI19:00 UTC+8, 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 92.

Over the next 24 hours the model expects the AQI to range from 90 around 16:00 to 152 around 21:00 (3 Nov).

132nd most polluted of 849 cities worldwide right now, 16th of 25 in China.

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

20:00 · 95 21:00 · 104 22:00 · 107 23:00 · 106 00:00 · 99 01:00 · 93 02:00 · 86 03:00 · 81 04:00 · 76 05:00 · 73 06:00 · 73 07:00 · 78 08:00 · 83 09:00 · 87 10:00 · 88 11:00 · 88 12:00 · 89 13:00 · 90 14:00 · 90 15:00 · 90 16:00 · 90 17:00 · 91 18:00 · 99 19:00 · 125 20:00 · 145 21:00 · 152 22:00 · 152 23:00 · 152 00:00 · 146 01:00 · 137 02:00 · 130 03:00 · 122 04:00 · 115 05:00 · 112 06:00 · 104 07:00 · 105 08:00 · 108 09:00 · 106 10:00 · 102 11:00 · 98 12:00 · 97 13:00 · 96 14:00 · 95 15:00 · 92 16:00 · 90 17:00 · 90 18:00 · 98 19:00 · 121 20:00 · 140 21:00 · 153 22:00 · 157 23:00 · 159 00:00 · 159 01:00 · 158 02:00 · 157 03:00 · 155 04:00 · 153 05:00 · 152 06:00 · 152 07:00 · 153 08:00 · 153 09:00 · 136 10:00 · 111 11:00 · 96 12:00 · 90 13:00 · 88 14:00 · 88 15:00 · 88 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 20:0095
Mon 21:00104
Mon 22:00107
Mon 23:00106
Tue 00:0099
Tue 01:0093
Tue 02:0086
Tue 03:0081
Tue 04:0076
Tue 05:0073
Tue 06:0073
Tue 07:0078
Tue 08:0083
Tue 09:0087
Tue 10:0088
Tue 11:0088
Tue 12:0089
Tue 13:0090
Tue 14:0090
Tue 15:0090
Tue 16:0090
Tue 17:0091
Tue 18:0099
Tue 19:00 · Now125
Tue 20:00 · Forecast145
Tue 21:00 · Forecast152
Tue 22:00 · Forecast152
Tue 23:00 · Forecast152
Wed 00:00 · Forecast146
Wed 01:00 · Forecast137
Wed 02:00 · Forecast130
Wed 03:00 · Forecast122
Wed 04:00 · Forecast115
Wed 05:00 · Forecast112
Wed 06:00 · Forecast104
Wed 07:00 · Forecast105
Wed 08:00 · Forecast108
Wed 09:00 · Forecast106
Wed 10:00 · Forecast102
Wed 11:00 · Forecast98
Wed 12:00 · Forecast97
Wed 13:00 · Forecast96
Wed 14:00 · Forecast95
Wed 15:00 · Forecast92
Wed 16:00 · Forecast90
Wed 17:00 · Forecast90
Wed 18:00 · Forecast98
Wed 19:00 · Forecast121
Wed 20:00 · Forecast140
Wed 21:00 · Forecast153
Wed 22:00 · Forecast157
Wed 23:00 · Forecast159
Thu 00:00 · Forecast159
Thu 01:00 · Forecast158
Thu 02:00 · Forecast157
Thu 03:00 · Forecast155
Thu 04:00 · Forecast153
Thu 05:00 · Forecast152
Thu 06:00 · Forecast152
Thu 07:00 · Forecast153
Thu 08:00 · Forecast153
Thu 09:00 · Forecast136
Thu 10:00 · Forecast111
Thu 11:00 · Forecast96
Thu 12:00 · Forecast90
Thu 13:00 · Forecast88
Thu 14:00 · Forecast88
Thu 15:00 · Forecast88

Pollutants this hour

  • PM2.5 55.1 µg/m³ 24-hour mean 31.1 µg/m³ · 2.1× WHO’s 24-hour guideline (15) 125
  • PM10 57 µg/m³ 43
  • O₃ 64 µg/m³ 90
  • NO₂ 91 µg/m³ 45
  • SO₂ 22 µg/m³ 11
  • CO 0.77 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
Dongguan Guangdong 102
Shenzhen Guangdong 87
Hong Kong Hong Kong 87
Nanning Guangxi 77
Tainan Taiwan 132
Haiphong Vietnam 71
Kaohsiung Taiwan 132

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 Guangzhou’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 Guangzhou right now?
125 on the US EPA scale (Unhealthy for sensitive groups) at 19:00 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 Guangzhou 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 Guangzhou get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 90 around 16:00 to 152 around 21:00 (3 Nov). Forecasts beyond a day are less certain.

How does Guangzhou compare with other cities?
Right now it is the 132nd most polluted of 849 cities we track worldwide, and 16th of 25 in China, all on the same US EPA scale.

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