Air quality
Air quality in Utsunomiya today
Updated
Moderate (US AQI 59) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Mon, Oct 26, 11:00 am (02:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Utsunomiya, Tochigi, Japan, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 59 Moderate
- PM2.5
- 10 µg/m³ 0.7× WHO 24-h guideline
- PM10
- 14 µg/m³
- Ozone
- 60 µg/m³
- Dominant pollutant
- PM2.5 sub-index 59
- Best hour today
- 9:00 pm AQI 52
- European AQI
- 31
Air quality in Utsunomiya right now
Right now the modelled US Air Quality Index for Utsunomiya, Tochigi, Japan is 59, which falls in the "Moderate" band (up to 100). Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 59. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 10 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 14 µg/m³ against a guideline of 45; ozone is 60 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 7.3 µg/m³ (below the 24-hour guideline of 25).
Also this hour: UV index 1, carbon monoxide 175 µg/m³.
Utsunomiya AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 34 around Tue 7:00 am to 59 around Mon 11:00 am, from "Good" at best to "Moderate" at worst.
The following day is expected to be cleaner, averaging about 41 against 47 for the next 24 hours.
| Local time (Asia/Tokyo) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 11:00 am | 59 | Moderate | 10.3 | 14 | 60 |
| Mon 2:00 pm | 57 | Moderate | 9.8 | 13 | 62 |
| Mon 5:00 pm | 56 | Moderate | 7.7 | 10 | 56 |
| Mon 8:00 pm | 53 | Moderate | 6 | 7 | 51 |
| Mon 11:00 pm | 47 | Good | 3.9 | 5 | 55 |
| Tue 2:00 am | 39 | Good | 3.1 | 4 | 55 |
| Tue 5:00 am | 35 | Good | 3 | 4 | 42 |
| Tue 8:00 am | 34 | Good | 6.4 | 7 | 36 |
| Tue 11:00 am | 34 | Good | 5.2 | 6 | 79 |
| Tue 2:00 pm | 30 | Good | 5.9 | 7 | 107 |
| Tue 5:00 pm | 40 | Good | 9.6 | 11 | 77 |
| Tue 8:00 pm | 41 | Good | 10.3 | 12 | 59 |
| Tue 11:00 pm | 34 | Good | 24.9 | 26 | 29 |
| Wed 2:00 am | 48 | Good | 7.9 | 8 | 41 |
| Wed 5:00 am | 49 | Good | 4.3 | 5 | 51 |
| Wed 8:00 am | 50 | Good | 2.3 | 3 | 68 |
| Wed 11:00 am | 47 | Good | 0.8 | 1 | 84 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Utsunomiya today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 9:00 pm (AQI 52, Moderate) and the worst around 11:00 am (AQI 59). The difference across the day is small, so timing matters little.
Utsunomiya vs the rest of Japan
Across 176 Japan cities we track, the average US AQI right now is 47 (Good). Utsunomiya at 59 is 12 points worse than average.
It ranks 131 of 176 from cleanest to most polluted; the cleanest is Gifu (15) and the most polluted Sakado (69).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Utsunomiya
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Tochigi | 24 km | 64 | Moderate | 7 |
| Oyama | 31 km | 64 | Moderate | 7 |
| Koga | 45 km | 64 | Moderate | 7 |
| Kazo | 56 km | 69 | Moderate | 10.8 |
| Kukichūō | 59 km | 69 | Moderate | 10.8 |
| Kōnosu | 64 km | 69 | Moderate | 10.8 |
| Kasukabe | 66 km | 69 | Moderate | 10.8 |
| Noda | 69 km | 69 | Moderate | 10.8 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Utsunomiya, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Advice for sensitive groups
At 59, most people are fine outdoors. If you are unusually sensitive to PM2.5, keep long or intense workouts to the cleaner hours shown above.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Utsunomiya
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).