Air quality
Air quality in Chaohu today
Updated
Moderate (US AQI 72) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Mon, Oct 26, 10:00 am (02:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Chaohu, Anhui, China, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 72 Moderate
- PM2.5
- 30 µg/m³ 2× WHO 24-h guideline
- PM10
- 37 µg/m³
- Ozone
- 61 µg/m³
- Dominant pollutant
- PM2.5 sub-index 72
- Best hour today
- 10:00 am AQI 72
- European AQI
- 48
Air quality in Chaohu right now
Right now the modelled US Air Quality Index for Chaohu, Anhui, China is 72, 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 72. 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 30 µg/m³, 2 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 37 µg/m³ against a guideline of 45; ozone is 61 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 26 µg/m³ (above the 24-hour guideline of 25).
Also this hour: UV index 4.4, carbon monoxide 663 µg/m³.
Chaohu AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 72 around Mon 10:00 am to 103 around Tue 9:00 am, from "Moderate" at best to "Unhealthy for Sensitive Groups" at worst.
The following day is expected to be worse, averaging about 95 against 86 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 | 72 | Moderate | 29.5 | 37 | 61 |
| Mon 1:00 pm | 76 | Moderate | 23.8 | 31 | 110 |
| Mon 4:00 pm | 80 | Moderate | 18.5 | 23 | 99 |
| Mon 7:00 pm | 82 | Moderate | 37 | 40 | 31 |
| Mon 10:00 pm | 86 | Moderate | 40.2 | 42 | 13 |
| Tue 1:00 am | 90 | Moderate | 39.6 | 41 | 26 |
| Tue 4:00 am | 94 | Moderate | 51.7 | 53 | 12 |
| Tue 7:00 am | 100 | Moderate | 53.7 | 55 | 5 |
| Tue 10:00 am | 103 | Unhealthy for Sensitive Groups | 24.9 | 30 | 29 |
| Tue 1:00 pm | 101 | Unhealthy for Sensitive Groups | 15.4 | 23 | 56 |
| Tue 4:00 pm | 99 | Moderate | 15.8 | 24 | 54 |
| Tue 7:00 pm | 98 | Moderate | 24.3 | 31 | 16 |
| Tue 10:00 pm | 95 | Moderate | 31.8 | 39 | 0 |
| Wed 1:00 am | 93 | Moderate | 34.6 | 42 | 0 |
| Wed 4:00 am | 91 | Moderate | 31 | 40 | 0 |
| Wed 7:00 am | 85 | Moderate | 27.2 | 38 | 12 |
| Wed 10:00 am | 81 | Moderate | 22.1 | 41 | 49 |
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 Chaohu today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 10:00 am (AQI 72, Moderate) and the worst around 9:00 pm (AQI 85). That is a swing of 13 points, so a run or walk around 10:00 am is noticeably better.
Chaohu vs the rest of China
Across 467 China cities we track, the average US AQI right now is 86 (Moderate). Chaohu at 72 is 14 points cleaner than average.
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Chaohu
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Wuhu | 60 km | 82 | Moderate | 41.4 |
| Ma’anshan | 62 km | 83 | Moderate | 45.5 |
| Hefei | 63 km | 74 | Moderate | 33.1 |
| Tongling | 73 km | 70 | Moderate | 32.7 |
| Chuzhou | 90 km | 74 | Moderate | 41.8 |
| Nanjing | 100 km | 102 | Unhealthy for Sensitive Groups | 53.7 |
| Chizhou | 111 km | 70 | Moderate | 32.7 |
| Xuancheng | 111 km | 78 | Moderate | 34.3 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Chaohu, 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 56 µg/m³ in the next 24 hours while NASA satellites detected 120 fire hotspots within 300 km in the last day (nearest about 6 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 72, 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 Chaohu
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.