Air quality
Air quality in Tongchuanshi today
Updated
Unhealthy (US AQI 151) Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. Model estimate for Mon, Oct 26, 4:00 am (20:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Tongchuanshi, Shaanxi, China, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 151 Unhealthy
- PM2.5
- 35 µg/m³ 2.3× WHO 24-h guideline
- PM10
- 37 µg/m³
- Ozone
- 25 µg/m³
- Dominant pollutant
- PM2.5 sub-index 151
- Best hour today
- 9:00 pm AQI 88
- European AQI
- 51
Air quality in Tongchuanshi right now
Right now the modelled US Air Quality Index for Tongchuanshi, Shaanxi, China is 151, which falls in the "Unhealthy" band (up to 200). Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed.
The index is driven mainly by PM2.5, whose own sub-index is 151. 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 35 µg/m³, 2.3 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 37 µg/m³ against a guideline of 45; ozone is 25 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 15 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 385 µg/m³.
Tongchuanshi AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 70 around Tue 4:00 am to 151 around Mon 4:00 am, from "Moderate" at best to "Unhealthy" at worst.
The following day is expected to be cleaner, averaging about 71 against 104 for the next 24 hours.
| Local time (Asia/Shanghai) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 4:00 am | 151 | Unhealthy | 34.6 | 37 | 25 |
| Mon 7:00 am | 137 | Unhealthy for Sensitive Groups | 13.8 | 15 | 38 |
| Mon 10:00 am | 119 | Unhealthy for Sensitive Groups | 9 | 17 | 64 |
| Mon 1:00 pm | 104 | Unhealthy for Sensitive Groups | 14.7 | 38 | 76 |
| Mon 4:00 pm | 97 | Moderate | 15.6 | 39 | 71 |
| Mon 7:00 pm | 92 | Moderate | 20.7 | 36 | 52 |
| Mon 10:00 pm | 86 | Moderate | 27 | 43 | 42 |
| Tue 1:00 am | 78 | Moderate | 27.4 | 43 | 42 |
| Tue 4:00 am | 70 | Moderate | 22.2 | 38 | 49 |
| Tue 7:00 am | 69 | Moderate | 18.8 | 33 | 51 |
| Tue 10:00 am | 70 | Moderate | 11 | 27 | 64 |
| Tue 1:00 pm | 70 | Moderate | 12.7 | 40 | 71 |
| Tue 4:00 pm | 70 | Moderate | 15.4 | 44 | 71 |
| Tue 7:00 pm | 70 | Moderate | 25.1 | 50 | 36 |
| Tue 10:00 pm | 72 | Moderate | 37.5 | 63 | 24 |
| Wed 1:00 am | 73 | Moderate | 27.5 | 60 | 45 |
| Wed 4:00 am | 74 | Moderate | 28.5 | 69 | 53 |
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 Tongchuanshi today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 9:00 pm (AQI 88, Moderate) and the worst around 6:00 am (AQI 143). That is a swing of 55 points, so a run or walk around 9:00 pm is noticeably better.
Tongchuanshi vs the rest of China
Across 447 China cities we track, the average US AQI right now is 84 (Moderate). Tongchuanshi at 151 is 67 points worse than average.
It ranks 434 of 447 from cleanest to most polluted; the cleanest is Baicheng (19) and the most polluted Kashgar (250).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Tongchuanshi
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Yintai | 5 km | 156 | Unhealthy | 27.8 |
| Tongchuan | 23 km | 156 | Unhealthy | 27.8 |
| Weinan | 74 km | 121 | Unhealthy for Sensitive Groups | 46.6 |
| Xianyang | 89 km | 179 | Unhealthy | 36.3 |
| Xi’an | 92 km | 179 | Unhealthy | 36.3 |
| Yongji | 126 km | 107 | Unhealthy for Sensitive Groups | 41.8 |
| Hancheng | 129 km | 127 | Unhealthy for Sensitive Groups | 31.2 |
| Qingyang | 148 km | 80 | Moderate | 19.3 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Tongchuanshi, 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 151, children, older adults, pregnant people and anyone with asthma, COPD or heart disease should limit time outdoors, especially strenuous activity. A well-fitted N95/FFP2 mask cuts particle exposure; it does not filter ozone.
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 Tongchuanshi
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).