Air quality
Air quality in Leshan today
Updated
Unhealthy (US AQI 158) Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. Model estimate for Mon, Oct 26, 10:00 am (02:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Leshan, Sichuan, China, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 158 Unhealthy
- PM2.5
- 82 µg/m³ 5.5× WHO 24-h guideline
- PM10
- 83 µg/m³
- Ozone
- 60 µg/m³
- Dominant pollutant
- PM2.5 sub-index 158
- Best hour today
- 10:00 am AQI 158
- European AQI
- 76
Air quality in Leshan right now
Right now the modelled US Air Quality Index for Leshan, Sichuan, China is 158, 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 158. 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 82 µg/m³, 5.5 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 83 µg/m³ against a guideline of 45; ozone is 60 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 21 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 569 µg/m³.
Leshan AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 95 around Tue 10:00 am to 162 around Mon 2:00 pm, from "Moderate" at best to "Unhealthy" at worst.
The following day is expected to be cleaner, averaging about 97 against 148 for the next 24 hours.
| Local time (Asia/Shanghai) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 10:00 am | 158 | Unhealthy | 82.4 | 83 | 60 |
| Mon 1:00 pm | 161 | Unhealthy | 32.6 | 34 | 57 |
| Mon 4:00 pm | 162 | Unhealthy | 21.2 | 26 | 59 |
| Mon 7:00 pm | 162 | Unhealthy | 23.3 | 29 | 46 |
| Mon 10:00 pm | 160 | Unhealthy | 29.9 | 35 | 34 |
| Tue 1:00 am | 153 | Unhealthy | 31.5 | 37 | 30 |
| Tue 4:00 am | 137 | Unhealthy for Sensitive Groups | 29.9 | 35 | 29 |
| Tue 7:00 am | 112 | Unhealthy for Sensitive Groups | 30.6 | 37 | 28 |
| Tue 10:00 am | 95 | Moderate | 34 | 46 | 53 |
| Tue 1:00 pm | 87 | Moderate | 25.7 | 40 | 74 |
| Tue 4:00 pm | 87 | Moderate | 25.6 | 39 | 84 |
| Tue 7:00 pm | 88 | Moderate | 35.3 | 48 | 59 |
| Tue 10:00 pm | 92 | Moderate | 51.9 | 66 | 30 |
| Wed 1:00 am | 98 | Moderate | 56.6 | 71 | 17 |
| Wed 4:00 am | 105 | Unhealthy for Sensitive Groups | 58 | 72 | 9 |
| Wed 7:00 am | 114 | Unhealthy for Sensitive Groups | 62.9 | 78 | 4 |
| Wed 10:00 am | 123 | Unhealthy for Sensitive Groups | 58.1 | 73 | 32 |
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 Leshan today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 10:00 am (AQI 158, Unhealthy) and the worst around 2:00 pm (AQI 162). The difference across the day is small, so timing matters little.
Leshan vs the rest of China
Across 447 China cities we track, the average US AQI right now is 86 (Moderate). Leshan at 158 is 72 points worse than average.
It ranks 388 of 447 from cleanest to most polluted; the cleanest is Hulunbuir (19) and the most polluted Kashgar (223).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Leshan
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Meishan | 54 km | 119 | Unhealthy for Sensitive Groups | 36.6 |
| Ya'an | 88 km | 52 | Moderate | 14.5 |
| Zigong | 101 km | 138 | Unhealthy for Sensitive Groups | 44.9 |
| Ziyang | 106 km | 92 | Moderate | 23.1 |
| Yibin | 123 km | 135 | Unhealthy for Sensitive Groups | 50.2 |
| Neijiang | 126 km | 100 | Moderate | 26.5 |
| Chengdu | 126 km | 121 | Unhealthy for Sensitive Groups | 33.1 |
| Luzhou | 178 km | 111 | Unhealthy for Sensitive Groups | 39.2 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Leshan, 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.
Wildfire smoke
PM2.5 is forecast to reach 82 µg/m³ in the next 24 hours while NASA satellites detected 20 fire hotspots within 300 km in the last day (nearest about 168 km away). Smoke is a likely contributor: keep windows closed, run an air purifier or HVAC filter, and check the fire map before heading out.
Advice for sensitive groups
At 158, 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 Leshan
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.