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Air quality · China

Tianjin Air Quality Index (AQI) today

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

177 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 174.

Over the next 24 hours the model expects the AQI to range from 123 around 17:00 to 181 around 23:00 (3 Nov).

24th most polluted of 849 cities worldwide right now, 3rd 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 · 172 23:00 · 169 00:00 · 165 01:00 · 161 02:00 · 158 03:00 · 157 04:00 · 159 05:00 · 162 06:00 · 170 07:00 · 190 08:00 · 214 09:00 · 206 10:00 · 192 11:00 · 183 12:00 · 176 13:00 · 170 14:00 · 166 15:00 · 163 16:00 · 161 17:00 · 166 18:00 · 173 19:00 · 176 20:00 · 177 21:00 · 177 22:00 · 179 23:00 · 181 00:00 · 179 01:00 · 176 02:00 · 172 03:00 · 168 04:00 · 162 05:00 · 159 06:00 · 157 07:00 · 159 08:00 · 161 09:00 · 163 10:00 · 162 11:00 · 159 12:00 · 155 13:00 · 152 14:00 · 142 15:00 · 132 16:00 · 125 17:00 · 123 18:00 · 130 19:00 · 141 20:00 · 149 21:00 · 151 22:00 · 151 23:00 · 152 00:00 · 152 01:00 · 152 02:00 · 153 03:00 · 154 04:00 · 156 05:00 · 157 06:00 · 159 07:00 · 167 08:00 · 177 09:00 · 188 10:00 · 193 11:00 · 189 12:00 · 176 13:00 · 157 14:00 · 129 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 22:00172
Mon 23:00169
Tue 00:00165
Tue 01:00161
Tue 02:00158
Tue 03:00157
Tue 04:00159
Tue 05:00162
Tue 06:00170
Tue 07:00190
Tue 08:00214
Tue 09:00206
Tue 10:00192
Tue 11:00183
Tue 12:00176
Tue 13:00170
Tue 14:00166
Tue 15:00163
Tue 16:00161
Tue 17:00166
Tue 18:00173
Tue 19:00176
Tue 20:00177
Tue 21:00 · Now177
Tue 22:00 · Forecast179
Tue 23:00 · Forecast181
Wed 00:00 · Forecast179
Wed 01:00 · Forecast176
Wed 02:00 · Forecast172
Wed 03:00 · Forecast168
Wed 04:00 · Forecast162
Wed 05:00 · Forecast159
Wed 06:00 · Forecast157
Wed 07:00 · Forecast159
Wed 08:00 · Forecast161
Wed 09:00 · Forecast163
Wed 10:00 · Forecast162
Wed 11:00 · Forecast159
Wed 12:00 · Forecast155
Wed 13:00 · Forecast152
Wed 14:00 · Forecast142
Wed 15:00 · Forecast132
Wed 16:00 · Forecast125
Wed 17:00 · Forecast123
Wed 18:00 · Forecast130
Wed 19:00 · Forecast141
Wed 20:00 · Forecast149
Wed 21:00 · Forecast151
Wed 22:00 · Forecast151
Wed 23:00 · Forecast152
Thu 00:00 · Forecast152
Thu 01:00 · Forecast152
Thu 02:00 · Forecast153
Thu 03:00 · Forecast154
Thu 04:00 · Forecast156
Thu 05:00 · Forecast157
Thu 06:00 · Forecast159
Thu 07:00 · Forecast167
Thu 08:00 · Forecast177
Thu 09:00 · Forecast188
Thu 10:00 · Forecast193
Thu 11:00 · Forecast189
Thu 12:00 · Forecast176
Thu 13:00 · Forecast157
Thu 14:00 · Forecast129
Thu 15:00 · Forecast103

Pollutants this hour

  • PM2.5 98.0 µg/m³ 24-hour mean 87.7 µg/m³ · 5.8× WHO’s 24-hour guideline (15) 177
  • PM10 114 µg/m³ 81
  • O₃ 0 µg/m³ 2
  • NO₂ 75 µg/m³ 37
  • SO₂ 29 µg/m³ 16
  • CO 2.12 mg/m³ 20

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
Beijing Beijing 380
Jinan Shandong 161
Weifang Shandong 156
Dalian Liaoning 155
Yantai Shandong 144
Qingdao Shandong 98
Zhengzhou Henan 107

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 Tianjin’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 Tianjin right now?
177 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 Tianjin 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 Tianjin get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 123 around 17:00 to 181 around 23:00 (3 Nov). Forecasts beyond a day are less certain.

How does Tianjin compare with other cities?
Right now it is the 24th most polluted of 849 cities we track worldwide, and 3rd of 25 in China, all on the same US EPA scale.

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