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Koga (Ibaraki) (JP)

Air Quality Trend (last 7 days)

Good (0-50)
Moderate (51-100)
Unhealthy for Sensitive Groups (101-150)
Unhealthy (151-200)
Very Unhealthy (201-300)
Hazardous (300+)

Weather - 48h MET Norway

Light rain
15°C
Light rain
Humidity
94.9%
Wind
6 m/s
Pressure
1009 hPa
Direction
175°
Sunrise
04:00
Sunset
16:00
24h Forecast:
Temp.
12° / 19°
Precip.
8.4mm
Max wind
7.8 m/s

Hourly Forecast

09.04
Now
Weather
15°
0.1
6
09.04
21:00
Weather
15°
0.2
6
09.04
22:00
Weather
16°
6
09.04
23:00
Weather
17°
0.1
6
10.04
00:00
Weather
18°
0.5
6
10.04
01:00
Weather
18°
0.9
7
10.04
02:00
Weather
18°
0.6
8
10.04
03:00
Weather
18°
0.5
8
10.04
04:00
Weather
18°
0.7
8
10.04
05:00
Weather
18°
0.6
7
10.04
06:00
Weather
18°
0.3
8
10.04
07:00
Weather
19°
0.3
7
10.04
08:00
Weather
18°
0.6
10.04
09:00
Weather
17°
3
10.04
10:00
Weather
17°
10.04
11:00
Weather
16°
10.04
12:00
Weather
16°
10.04
13:00
Weather
15°
10.04
14:00
Weather
14°
10.04
15:00
Weather
14°
10.04
16:00
Weather
13°
10.04
17:00
Weather
12°
10.04
18:00
Weather
12°
10.04
19:00
Weather
13°

Temperature

19°C
12°C
20:00
15°C
21:00
15°C
22:00
16°C
23:00
17°C
00:00
18°C
01:00
18°C
02:00
18°C
03:00
18°C
04:00
18°C
05:00
18°C
06:00
18°C
07:00
19°C
08:00
18°C
09:00
17°C
10:00
17°C
11:00
16°C
12:00
16°C
13:00
15°C
14:00
14°C
15:00
14°C
16:00
13°C
17:00
12°C
18:00
12°C
19:00
13°C
20:00 07:00 19:00

Precipitation

3mm
0mm
20:00
0.1mm
21:00
0.2mm
23:00
0.1mm
00:00
0.5mm
01:00
0.9mm
02:00
0.6mm
03:00
0.5mm
04:00
0.7mm
05:00
0.6mm
06:00
0.3mm
07:00
0.3mm
08:00
0.6mm
09:00
3mm
20:00 07:00 19:00

Wind

7.8m/s
0m/s
20:00
5.9 m/s
21:00
6 m/s
22:00
6.2 m/s
23:00
5.8 m/s
00:00
5.6 m/s
01:00
7.1 m/s
02:00
7.8 m/s
03:00
7.5 m/s
04:00
7.7 m/s
05:00
7.3 m/s
06:00
7.5 m/s
07:00
6.8 m/s
08:00
4.5 m/s
09:00
2.4 m/s
10:00
3.4 m/s
11:00
2.9 m/s
12:00
1.9 m/s
13:00
1.5 m/s
14:00
1.6 m/s
15:00
1 m/s
16:00
1.3 m/s
17:00
2.2 m/s
18:00
2.3 m/s
19:00
2.5 m/s
20:00 07:00 19:00

Radiation

0.059 uSv
59.3 km
7.4%

Measurement time: 2026-04-09 18:00

source: remap_europe

We display the worst measurements from all stations in the area. This approach provides a more cautious assessment of air quality, accounting for local pollution sources.

AQI
31 km
97
32.3%

Measurement time: 2026-04-09 21:00

Calculated from PM2.5/PM10

PM2.5
31 km
34 µg/m3
40.5%

Measurement time: 2026-04-09 21:00

source: Aqicn

O3
53.8 km
44 µg/m3
27.5%

Measurement time: 2026-04-09 21:00

source: Aqicn

PM10
82.5 km
22 µg/m3
15.7%

Measurement time: 2026-04-09 22:00

source: Aqicn

NO2
74.2 km
6.5 µg/m3
3.3%

Measurement time: 2026-04-09 22:00

source: Aqicn

SO2
82.5 km
2.9 µg/m3
0.8%

Measurement time: 2026-04-09 22:00

source: Aqicn

CO
53.8 km
0.0023 mg/m3
0%

Measurement time: 2026-04-09 21:00

source: Aqicn

About Air Quality in Koga

Air quality in Koga is monitored in real-time by sensors and measurement stations. On this page you'll find current data on major air pollutants including particulate matter PM2.5 and PM10, nitrogen dioxide (NO2), ozone (O3), and radiation levels.

Common Pollutants in Koga

  • PM2.5 - fine particulate matter up to 2.5 micrometers, particularly harmful to health
  • PM10 - particulate matter up to 10 micrometers from traffic and industry
  • NO2 - nitrogen dioxide mainly emitted by vehicles
  • O3 - tropospheric ozone formed in photochemical reactions

When is Air Quality Best in Koga?

Generally, the best air quality occurs:

  • Early morning (5:00-7:00 AM) before rush hour traffic
  • After rainfall which cleanses the atmosphere
  • During strong winds that disperse pollutants
  • In summer months when heating systems are less used

Tips for Runners in Koga

If you're planning outdoor activities in Koga, always check the current AQI value. When AQI exceeds 100, consider moving your workout indoors or shortening the distance. People with respiratory issues, children, and seniors should be especially cautious during elevated pollution levels. Choose routes away from busy streets and industrial areas.