Air quality
Air quality in Jiyuan today
Updated
Unhealthy for Sensitive Groups (US AQI 139) People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. Model estimate for Mon, Oct 26, 4:00 am (20:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Jiyuan, Henan, China, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 139 Unhealthy for Sensitive Groups
- PM2.5
- 56 µg/m³ 3.7× WHO 24-h guideline
- PM10
- 59 µg/m³
- Ozone
- 1 µg/m³
- Dominant pollutant
- PM2.5 sub-index 139
- Best hour today
- 9:00 pm AQI 105
- European AQI
- 63
Air quality in Jiyuan right now
Right now the modelled US Air Quality Index for Jiyuan, Henan, China is 139, which falls in the "Unhealthy for Sensitive Groups" band (up to 150). People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
The index is driven mainly by PM2.5, whose own sub-index is 139. 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 56 µg/m³, 3.7 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 59 µg/m³ against a guideline of 45; ozone is 1 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 37 µg/m³ (above the 24-hour guideline of 25).
Also this hour: carbon monoxide 1135 µg/m³.
Jiyuan AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 82 around Tue 4:00 am to 139 around Mon 4:00 am, from "Moderate" at best to "Unhealthy for Sensitive Groups" at worst.
The following day is expected to be cleaner, averaging about 64 against 117 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 | 139 | Unhealthy for Sensitive Groups | 55.8 | 59 | 1 |
| Mon 7:00 am | 135 | Unhealthy for Sensitive Groups | 47.3 | 50 | 2 |
| Mon 10:00 am | 131 | Unhealthy for Sensitive Groups | 29 | 30 | 31 |
| Mon 1:00 pm | 126 | Unhealthy for Sensitive Groups | 11.2 | 12 | 62 |
| Mon 4:00 pm | 117 | Unhealthy for Sensitive Groups | 8.4 | 10 | 62 |
| Mon 7:00 pm | 109 | Unhealthy for Sensitive Groups | 28.7 | 31 | 38 |
| Mon 10:00 pm | 103 | Unhealthy for Sensitive Groups | 30.7 | 36 | 31 |
| Tue 1:00 am | 94 | Moderate | 13.7 | 22 | 58 |
| Tue 4:00 am | 82 | Moderate | 8.6 | 13 | 66 |
| Tue 7:00 am | 72 | Moderate | 8.2 | 10 | 46 |
| Tue 10:00 am | 64 | Moderate | 7.1 | 11 | 65 |
| Tue 1:00 pm | 61 | Moderate | 8.9 | 19 | 85 |
| Tue 4:00 pm | 60 | Moderate | 9.4 | 17 | 77 |
| Tue 7:00 pm | 60 | Moderate | 20.1 | 24 | 31 |
| Tue 10:00 pm | 58 | Moderate | 32.6 | 42 | 3 |
| Wed 1:00 am | 60 | Moderate | 34.8 | 50 | 0 |
| Wed 4:00 am | 66 | Moderate | 34 | 53 | 0 |
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 Jiyuan today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 9:00 pm (AQI 105, Unhealthy for Sensitive Groups) and the worst around 6:00 am (AQI 137). That is a swing of 32 points, so a run or walk around 9:00 pm is noticeably better.
Jiyuan vs the rest of China
Across 467 China cities we track, the average US AQI right now is 84 (Moderate). Jiyuan at 139 is 55 points worse than average.
For context, the median across 3,909 cities worldwide is 56.
Air quality in cities near Jiyuan
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Luoyang | 48 km | 156 | Unhealthy | 72.4 |
| Jincheng | 51 km | 112 | Unhealthy for Sensitive Groups | 39.3 |
| Jiaozuo | 61 km | 152 | Unhealthy | 65.2 |
| Changzhi, Shanxi | 78 km | 92 | Moderate | 36.2 |
| Zhengzhou | 103 km | 161 | Unhealthy | 66.8 |
| Xinxiang | 111 km | 158 | Unhealthy | 62.2 |
| Changzhi | 130 km | 72 | Moderate | 22.4 |
| Sanmenxia | 132 km | 107 | Unhealthy for Sensitive Groups | 30.3 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Jiyuan, 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 139, 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 Jiyuan
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).