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Air quality · Henan, China

Zhengzhou Air Quality Index (AQI) today

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

106 Unhealthy for sensitive groups

Live estimate · modelled

US EPA AQI20:00 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 156.

Over the next 24 hours the model expects the AQI to range from 88 around 16:00 to 161 around 20:00 (4 Nov).

183rd most polluted of 849 cities worldwide right now, 21st 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

21:00 · 173 22:00 · 179 23:00 · 180 00:00 · 177 01:00 · 172 02:00 · 168 03:00 · 166 04:00 · 164 05:00 · 164 06:00 · 164 07:00 · 165 08:00 · 167 09:00 · 166 10:00 · 164 11:00 · 158 12:00 · 149 13:00 · 125 14:00 · 108 15:00 · 95 16:00 · 89 17:00 · 92 18:00 · 99 19:00 · 104 20:00 · 106 21:00 · 107 22:00 · 109 23:00 · 111 00:00 · 115 01:00 · 122 02:00 · 125 03:00 · 127 04:00 · 128 05:00 · 132 06:00 · 141 07:00 · 154 08:00 · 159 09:00 · 158 10:00 · 153 11:00 · 146 12:00 · 128 13:00 · 111 14:00 · 99 15:00 · 93 16:00 · 88 17:00 · 90 18:00 · 113 19:00 · 152 20:00 · 161 21:00 · 164 22:00 · 159 23:00 · 153 00:00 · 138 01:00 · 122 02:00 · 113 03:00 · 108 04:00 · 106 05:00 · 106 06:00 · 108 07:00 · 115 08:00 · 125 09:00 · 132 10:00 · 131 11:00 · 127 12:00 · 121 13:00 · 111 14:00 · 106 15:00 · 103 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 21:00173
Mon 22:00179
Mon 23:00180
Tue 00:00177
Tue 01:00172
Tue 02:00168
Tue 03:00166
Tue 04:00164
Tue 05:00164
Tue 06:00164
Tue 07:00165
Tue 08:00167
Tue 09:00166
Tue 10:00164
Tue 11:00158
Tue 12:00149
Tue 13:00125
Tue 14:00108
Tue 15:0095
Tue 16:0089
Tue 17:0092
Tue 18:0099
Tue 19:00104
Tue 20:00 · Now106
Tue 21:00 · Forecast107
Tue 22:00 · Forecast109
Tue 23:00 · Forecast111
Wed 00:00 · Forecast115
Wed 01:00 · Forecast122
Wed 02:00 · Forecast125
Wed 03:00 · Forecast127
Wed 04:00 · Forecast128
Wed 05:00 · Forecast132
Wed 06:00 · Forecast141
Wed 07:00 · Forecast154
Wed 08:00 · Forecast159
Wed 09:00 · Forecast158
Wed 10:00 · Forecast153
Wed 11:00 · Forecast146
Wed 12:00 · Forecast128
Wed 13:00 · Forecast111
Wed 14:00 · Forecast99
Wed 15:00 · Forecast93
Wed 16:00 · Forecast88
Wed 17:00 · Forecast90
Wed 18:00 · Forecast113
Wed 19:00 · Forecast152
Wed 20:00 · Forecast161
Wed 21:00 · Forecast164
Wed 22:00 · Forecast159
Wed 23:00 · Forecast153
Thu 00:00 · Forecast138
Thu 01:00 · Forecast122
Thu 02:00 · Forecast113
Thu 03:00 · Forecast108
Thu 04:00 · Forecast106
Thu 05:00 · Forecast106
Thu 06:00 · Forecast108
Thu 07:00 · Forecast115
Thu 08:00 · Forecast125
Thu 09:00 · Forecast132
Thu 10:00 · Forecast131
Thu 11:00 · Forecast127
Thu 12:00 · Forecast121
Thu 13:00 · Forecast111
Thu 14:00 · Forecast106
Thu 15:00 · Forecast103

Pollutants this hour

  • PM2.5 38.6 µg/m³ 24-hour mean 62.7 µg/m³ · 4.2× WHO’s 24-hour guideline (15) 106
  • PM10 42 µg/m³ 39
  • O₃ 7 µg/m³ 13
  • NO₂ 72 µg/m³ 36
  • SO₂ 7 µg/m³ 3
  • CO 0.83 mg/m³ 9

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
Jinan Shandong 159
Xi’an Shaanxi 210
Hefei Anhui 145
Wuhan Hubei 146
Weifang Shandong 155
Nanjing Jiangsu 144
Tianjin Tianjin 177

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 Zhengzhou’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 Zhengzhou right now?
106 on the US EPA scale (Unhealthy for sensitive groups) 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 Zhengzhou 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 Zhengzhou get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 88 around 16:00 to 161 around 20:00 (4 Nov). Forecasts beyond a day are less certain.

How does Zhengzhou compare with other cities?
Right now it is the 183rd most polluted of 849 cities we track worldwide, and 21st of 25 in China, all on the same US EPA scale.

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