Air quality
Air quality in Kiến An today
Updated
Moderate (US AQI 78) Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. Model estimate for Mon, Oct 26, 9:00 am (02:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Kiến An, Hai Phong, Vietnam, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 78 Moderate
- PM2.5
- 18 µg/m³ 1.2× WHO 24-h guideline
- PM10
- 22 µg/m³
- Ozone
- 125 µg/m³
- Dominant pollutant
- PM2.5 sub-index 78
- Best hour today
- 1:00 pm AQI 75
- European AQI
- 63
Air quality in Kiến An right now
Right now the modelled US Air Quality Index for Kiến An, Hai Phong, Vietnam is 78, 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 78. 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 18 µg/m³, 1.2 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 22 µg/m³ against a guideline of 45; ozone is 125 µg/m³ (above the WHO 8-hour level of 100); nitrogen dioxide is 6.5 µg/m³ (below the 24-hour guideline of 25).
Also this hour: UV index 3.7, carbon monoxide 303 µg/m³.
NASA FIRMS shows 108 fire hotspots within 300 km in the last day (nearest about 26 km), but particle levels are not elevated enough to point to smoke right now.
Kiến An AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 70 around Tue 4:00 am to 101 around Mon 6:00 pm, from "Moderate" at best to "Unhealthy for Sensitive Groups" at worst.
The following day is expected to be worse, averaging about 93 against 83 for the next 24 hours.
| Local time (Asia/Bangkok) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Mon 9:00 am | 78 | Moderate | 18.4 | 22 | 125 |
| Mon 12:00 pm | 76 | Moderate | 17.2 | 21 | 143 |
| Mon 3:00 pm | 87 | Moderate | 14.7 | 17 | 136 |
| Mon 6:00 pm | 101 | Unhealthy for Sensitive Groups | 19.4 | 21 | 126 |
| Mon 9:00 pm | 92 | Moderate | 28.8 | 29 | 132 |
| Tue 12:00 am | 86 | Moderate | 24.7 | 26 | 116 |
| Tue 3:00 am | 72 | Moderate | 20.9 | 22 | 96 |
| Tue 6:00 am | 71 | Moderate | 22.6 | 23 | 95 |
| Tue 9:00 am | 73 | Moderate | 23.9 | 26 | 141 |
| Tue 12:00 pm | 74 | Moderate | 24.4 | 26 | 167 |
| Tue 3:00 pm | 118 | Unhealthy for Sensitive Groups | 20.4 | 22 | 158 |
| Tue 6:00 pm | 136 | Unhealthy for Sensitive Groups | 20 | 21 | 129 |
| Tue 9:00 pm | 107 | Unhealthy for Sensitive Groups | 22.9 | 24 | 98 |
| Wed 12:00 am | 76 | Moderate | 29.2 | 30 | 59 |
| Wed 3:00 am | 77 | Moderate | 30.2 | 31 | 45 |
| Wed 6:00 am | 79 | Moderate | 32.7 | 34 | 57 |
| Wed 9:00 am | 82 | Moderate | 26.3 | 28 | 133 |
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 Kiến An today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 1:00 pm (AQI 75, Moderate) and the worst around 6:00 pm (AQI 101). That is a swing of 26 points, so a run or walk around 1:00 pm is noticeably better.
Kiến An vs the rest of Vietnam
Across 64 Vietnam cities we track, the average US AQI right now is 83 (Moderate). Kiến An at 78 is 5 points cleaner than average.
It ranks 40 of 64 from cleanest to most polluted; the cleanest is Phu Quoc (35) and the most polluted Mỹ Hào (116).
For context, the median across 3,556 cities worldwide is 58.
Air quality in cities near Kiến An
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Haiphong | 9 km | 83 | Moderate | 21.4 |
| Mỹ Hào | 58 km | 116 | Unhealthy for Sensitive Groups | 26.1 |
| Nam Định | 62 km | 106 | Unhealthy for Sensitive Groups | 28.7 |
| Thuận Thanh | 63 km | 116 | Unhealthy for Sensitive Groups | 26.1 |
| Bắc Giang | 69 km | 116 | Unhealthy for Sensitive Groups | 26.1 |
| Bắc Ninh | 71 km | 116 | Unhealthy for Sensitive Groups | 26.1 |
| Việt Yên | 72 km | 116 | Unhealthy for Sensitive Groups | 26.1 |
| Gia Lâm | 75 km | 116 | Unhealthy for Sensitive Groups | 26.1 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Kiến An, 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 78, 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 Kiến An
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.