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Air quality · Liaoning, China

Dalian Air Quality Index (AQI) today

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

156 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 154.

Over the next 24 hours the model expects the AQI to range from 94 around 12:00 to 155 around 21:00 (3 Nov).

83rd most polluted of 849 cities worldwide right now, 7th 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 · 155 22:00 · 156 23:00 · 156 00:00 · 156 01:00 · 155 02:00 · 155 03:00 · 154 04:00 · 152 05:00 · 149 06:00 · 144 07:00 · 143 08:00 · 141 09:00 · 140 10:00 · 141 11:00 · 144 12:00 · 149 13:00 · 153 14:00 · 155 15:00 · 157 16:00 · 158 17:00 · 159 18:00 · 158 19:00 · 157 20:00 · 156 21:00 · 155 22:00 · 155 23:00 · 154 00:00 · 154 01:00 · 154 02:00 · 154 03:00 · 154 04:00 · 152 05:00 · 150 06:00 · 142 07:00 · 132 08:00 · 119 09:00 · 107 10:00 · 99 11:00 · 95 12:00 · 94 13:00 · 94 14:00 · 95 15:00 · 96 16:00 · 98 17:00 · 101 18:00 · 103 19:00 · 104 20:00 · 105 21:00 · 106 22:00 · 105 23:00 · 104 00:00 · 100 01:00 · 94 02:00 · 85 03:00 · 77 04:00 · 73 05:00 · 71 06:00 · 71 07:00 · 74 08:00 · 80 09:00 · 84 10:00 · 87 11:00 · 87 12:00 · 92 13:00 · 109 14:00 · 129 15:00 · 138 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 21:00155
Mon 22:00156
Mon 23:00156
Tue 00:00156
Tue 01:00155
Tue 02:00155
Tue 03:00154
Tue 04:00152
Tue 05:00149
Tue 06:00144
Tue 07:00143
Tue 08:00141
Tue 09:00140
Tue 10:00141
Tue 11:00144
Tue 12:00149
Tue 13:00153
Tue 14:00155
Tue 15:00157
Tue 16:00158
Tue 17:00159
Tue 18:00158
Tue 19:00157
Tue 20:00 · Now156
Tue 21:00 · Forecast155
Tue 22:00 · Forecast155
Tue 23:00 · Forecast154
Wed 00:00 · Forecast154
Wed 01:00 · Forecast154
Wed 02:00 · Forecast154
Wed 03:00 · Forecast154
Wed 04:00 · Forecast152
Wed 05:00 · Forecast150
Wed 06:00 · Forecast142
Wed 07:00 · Forecast132
Wed 08:00 · Forecast119
Wed 09:00 · Forecast107
Wed 10:00 · Forecast99
Wed 11:00 · Forecast95
Wed 12:00 · Forecast94
Wed 13:00 · Forecast94
Wed 14:00 · Forecast95
Wed 15:00 · Forecast96
Wed 16:00 · Forecast98
Wed 17:00 · Forecast101
Wed 18:00 · Forecast103
Wed 19:00 · Forecast104
Wed 20:00 · Forecast105
Wed 21:00 · Forecast106
Wed 22:00 · Forecast105
Wed 23:00 · Forecast104
Thu 00:00 · Forecast100
Thu 01:00 · Forecast94
Thu 02:00 · Forecast85
Thu 03:00 · Forecast77
Thu 04:00 · Forecast73
Thu 05:00 · Forecast71
Thu 06:00 · Forecast71
Thu 07:00 · Forecast74
Thu 08:00 · Forecast80
Thu 09:00 · Forecast84
Thu 10:00 · Forecast87
Thu 11:00 · Forecast87
Thu 12:00 · Forecast92
Thu 13:00 · Forecast109
Thu 14:00 · Forecast129
Thu 15:00 · Forecast138

Pollutants this hour

  • PM2.5 58.2 µg/m³ 24-hour mean 59.2 µg/m³ · 3.9× WHO’s 24-hour guideline (15) 156
  • PM10 110 µg/m³ 81
  • O₃ 43 µg/m³ 16
  • NO₂ 39 µg/m³ 19
  • SO₂ 14 µg/m³ 7
  • CO 0.48 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
Yantai Shandong 141
Weifang Shandong 155
Qingdao Shandong 110
Shenyang Liaoning 147
Pyongyang North Korea 142
Tianjin Tianjin 177
Beijing Beijing 338

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 Dalian’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 Dalian right now?
156 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 Dalian 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 Dalian get better or worse tomorrow?
Over the next 24 hours the model expects the AQI to range from 94 around 12:00 to 155 around 21:00 (3 Nov). Forecasts beyond a day are less certain.

How does Dalian compare with other cities?
Right now it is the 83rd most polluted of 849 cities we track worldwide, and 7th of 25 in China, all on the same US EPA scale.

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