Air quality · South Korea
Incheon Air Quality Index (AQI) today
Modelled estimate for 21:00 local time (UTC+9), refreshed 3 Nov, 07:52 UTC+0.
Live estimate · modelled
US EPA AQI21:00 UTC+9, 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 137.
Over the next 24 hours the model expects the AQI to range from 147 around 16:00 to 177 around 21:00 (4 Nov).
41st most polluted of 849 cities worldwide right now, 1st of 12 in South Korea.
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
US EPA AQI per hour, UTC+9. 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
| Time | AQI |
|---|---|
| Mon 22:00 | 92 |
| Mon 23:00 | 102 |
| Tue 00:00 | 120 |
| Tue 01:00 | 130 |
| Tue 02:00 | 134 |
| Tue 03:00 | 136 |
| Tue 04:00 | 133 |
| Tue 05:00 | 126 |
| Tue 06:00 | 121 |
| Tue 07:00 | 123 |
| Tue 08:00 | 130 |
| Tue 09:00 | 129 |
| Tue 10:00 | 128 |
| Tue 11:00 | 127 |
| Tue 12:00 | 123 |
| Tue 13:00 | 120 |
| Tue 14:00 | 120 |
| Tue 15:00 | 120 |
| Tue 16:00 | 121 |
| Tue 17:00 | 124 |
| Tue 18:00 | 142 |
| Tue 19:00 | 157 |
| Tue 20:00 | 164 |
| Tue 21:00 · Now | 168 |
| Tue 22:00 · Forecast | 171 |
| Tue 23:00 · Forecast | 173 |
| Wed 00:00 · Forecast | 172 |
| Wed 01:00 · Forecast | 169 |
| Wed 02:00 · Forecast | 166 |
| Wed 03:00 · Forecast | 162 |
| Wed 04:00 · Forecast | 159 |
| Wed 05:00 · Forecast | 158 |
| Wed 06:00 · Forecast | 155 |
| Wed 07:00 · Forecast | 155 |
| Wed 08:00 · Forecast | 156 |
| Wed 09:00 · Forecast | 157 |
| Wed 10:00 · Forecast | 156 |
| Wed 11:00 · Forecast | 155 |
| Wed 12:00 · Forecast | 154 |
| Wed 13:00 · Forecast | 154 |
| Wed 14:00 · Forecast | 153 |
| Wed 15:00 · Forecast | 152 |
| Wed 16:00 · Forecast | 147 |
| Wed 17:00 · Forecast | 151 |
| Wed 18:00 · Forecast | 158 |
| Wed 19:00 · Forecast | 167 |
| Wed 20:00 · Forecast | 174 |
| Wed 21:00 · Forecast | 177 |
| Wed 22:00 · Forecast | 178 |
| Wed 23:00 · Forecast | 176 |
| Thu 00:00 · Forecast | 170 |
| Thu 01:00 · Forecast | 162 |
| Thu 02:00 · Forecast | 155 |
| Thu 03:00 · Forecast | 146 |
| Thu 04:00 · Forecast | 132 |
| Thu 05:00 · Forecast | 122 |
| Thu 06:00 · Forecast | 113 |
| Thu 07:00 · Forecast | 112 |
| Thu 08:00 · Forecast | 118 |
| Thu 09:00 · Forecast | 124 |
| Thu 10:00 · Forecast | 121 |
| Thu 11:00 · Forecast | 108 |
| Thu 12:00 · Forecast | 93 |
| Thu 13:00 · Forecast | 80 |
| Thu 14:00 · Forecast | 70 |
| Thu 15:00 · Forecast | 63 |
| Thu 16:00 · Forecast | 59 |
Pollutants this hour
- PM2.5 86.8 µg/m³ 24-hour mean 50.4 µg/m³ · 3.4× WHO’s 24-hour guideline (15) 168
- PM10 119 µg/m³ 80
- O₃ 0 µg/m³ 12
- NO₂ 79 µg/m³ 39
- SO₂ 82 µg/m³ 44
- CO 0.97 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 | Category |
|---|---|---|
| Seoul Seoul | 168 | Unhealthy |
| Suwon Gyeonggi-do | 147 | Sensitive groups |
| Cheonan Chungcheongnam-do | 107 | Sensitive groups |
| Cheongju-si North Chungcheong | 109 | Sensitive groups |
| Daejeon Daejeon | 112 | Sensitive groups |
| Jeonju Jeollabuk-do | 123 | Sensitive groups |
| Pyongyang North Korea | 142 | Sensitive groups |
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 Incheon’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