GlobeMetrics
EN
  • English✓
  • हिंदी—
  • मराठी—

Try “Pune”, “Poona” or “पुणे”

Air quality · Zhejiang, China

Hangzhou Air Quality Index (AQI) today

Modelled estimate for 20:00 local time (UTC+8), refreshed 3 Nov, 07:52 UTC+0.

158 Unhealthy

Live estimate · modelled

US EPA AQI20:00 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 183.

Over the next 24 hours the model expects the AQI to range from 108 around 05:00 to 200 around 20:00 (4 Nov).

76th most polluted of 849 cities worldwide right now, 6th 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

21:00 · 187 22:00 · 197 23:00 · 208 00:00 · 213 01:00 · 215 02:00 · 214 03:00 · 213 04:00 · 213 05:00 · 214 06:00 · 217 07:00 · 220 08:00 · 214 09:00 · 199 10:00 · 185 11:00 · 173 12:00 · 163 13:00 · 156 14:00 · 153 15:00 · 153 16:00 · 147 17:00 · 147 18:00 · 154 19:00 · 157 20:00 · 158 21:00 · 155 22:00 · 152 23:00 · 144 00:00 · 132 01:00 · 126 02:00 · 122 03:00 · 116 04:00 · 112 05:00 · 108 06:00 · 114 07:00 · 128 08:00 · 135 09:00 · 135 10:00 · 132 11:00 · 124 12:00 · 116 13:00 · 113 14:00 · 115 15:00 · 121 16:00 · 132 17:00 · 152 18:00 · 168 19:00 · 185 20:00 · 200 21:00 · 202 22:00 · 194 23:00 · 181 00:00 · 167 01:00 · 155 02:00 · 131 03:00 · 113 04:00 · 104 05:00 · 101 06:00 · 106 07:00 · 121 08:00 · 124 09:00 · 109 10:00 · 92 11:00 · 82 12:00 · 78 13:00 · 78 14:00 · 78 15:00 · 78 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 21:00187
Mon 22:00197
Mon 23:00208
Tue 00:00213
Tue 01:00215
Tue 02:00214
Tue 03:00213
Tue 04:00213
Tue 05:00214
Tue 06:00217
Tue 07:00220
Tue 08:00214
Tue 09:00199
Tue 10:00185
Tue 11:00173
Tue 12:00163
Tue 13:00156
Tue 14:00153
Tue 15:00153
Tue 16:00147
Tue 17:00147
Tue 18:00154
Tue 19:00157
Tue 20:00 · Now158
Tue 21:00 · Forecast155
Tue 22:00 · Forecast152
Tue 23:00 · Forecast144
Wed 00:00 · Forecast132
Wed 01:00 · Forecast126
Wed 02:00 · Forecast122
Wed 03:00 · Forecast116
Wed 04:00 · Forecast112
Wed 05:00 · Forecast108
Wed 06:00 · Forecast114
Wed 07:00 · Forecast128
Wed 08:00 · Forecast135
Wed 09:00 · Forecast135
Wed 10:00 · Forecast132
Wed 11:00 · Forecast124
Wed 12:00 · Forecast116
Wed 13:00 · Forecast113
Wed 14:00 · Forecast115
Wed 15:00 · Forecast121
Wed 16:00 · Forecast132
Wed 17:00 · Forecast152
Wed 18:00 · Forecast168
Wed 19:00 · Forecast185
Wed 20:00 · Forecast200
Wed 21:00 · Forecast202
Wed 22:00 · Forecast194
Wed 23:00 · Forecast181
Thu 00:00 · Forecast167
Thu 01:00 · Forecast155
Thu 02:00 · Forecast131
Thu 03:00 · Forecast113
Thu 04:00 · Forecast104
Thu 05:00 · Forecast101
Thu 06:00 · Forecast106
Thu 07:00 · Forecast121
Thu 08:00 · Forecast124
Thu 09:00 · Forecast109
Thu 10:00 · Forecast92
Thu 11:00 · Forecast82
Thu 12:00 · Forecast78
Thu 13:00 · Forecast78
Thu 14:00 · Forecast78
Thu 15:00 · Forecast78

Pollutants this hour

  • PM2.5 67.3 µg/m³ 24-hour mean 101.8 µg/m³ · 6.8× WHO’s 24-hour guideline (15) 158
  • PM10 79 µg/m³ 61
  • O₃ 2 µg/m³ 2
  • NO₂ 79 µg/m³ 39
  • SO₂ 6 µg/m³ 3
  • CO 0.45 mg/m³ 6

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
Suzhou Jiangsu 141
Shanghai Shanghai 149
Nanjing Jiangsu 144
Hefei Anhui 145
Wuhan Hubei 146
Taipei Taiwan 90
Qingdao Shandong 110

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 Hangzhou’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 Hangzhou right now?
158 on the US EPA scale (Unhealthy) at 20:00 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 Hangzhou 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 Hangzhou get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 108 around 05:00 to 200 around 20:00 (4 Nov). Forecasts beyond a day are less certain.

How does Hangzhou compare with other cities?
Right now it is the 76th most polluted of 849 cities we track worldwide, and 6th of 25 in China, all on the same US EPA scale.

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