Air quality

Air quality in Hải Dương today

Updated

Unhealthy for Sensitive Groups (US AQI 107) 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, 2:00 am (19:00 UTC).

Live AQI, PM2.5, PM10 and ozone for Hải Dương, Hai Phong, Vietnam, with a 48-hour forecast and the best time to be outside.

US AQI now
107 Unhealthy for Sensitive Groups
PM2.5
62 µg/m³ 4.1× WHO 24-h guideline
PM10
65 µg/m³
Ozone
73 µg/m³
Dominant pollutant
PM2.5 sub-index 107
Best hour today
10:00 am AQI 100
European AQI
66

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Air quality in Hải Dương right now

Right now the modelled US Air Quality Index for Hải Dương, Hai Phong, Vietnam is 107, 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 107. 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 62 µg/m³, 4.1 times the WHO 24-hour guideline of 15 µg/m³; PM10 is 65 µg/m³ against a guideline of 45; ozone is 73 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 25 µg/m³ (right at the 24-hour guideline of 25).

Also this hour: carbon monoxide 549 µg/m³.

Hải Dương AQI forecast: next 48 hours

Over the next 24 hours the AQI is forecast to range from 100 around Mon 10:00 am to 151 around Mon 6:00 pm, from "Moderate" at best to "Unhealthy" at worst.

The following day is expected to be worse, averaging about 129 against 114 for the next 24 hours.

Local time (Asia/Bangkok)US AQICategoryPM2.5 µg/m³PM10 µg/m³Ozone µg/m³
Mon 2:00 am107Unhealthy for Sensitive Groups62.26573
Mon 5:00 am110Unhealthy for Sensitive Groups23.92689
Mon 8:00 am102Unhealthy for Sensitive Groups21.225114
Mon 11:00 am100Moderate25.528168
Mon 2:00 pm104Unhealthy for Sensitive Groups29.631178
Mon 5:00 pm149Unhealthy for Sensitive Groups30.532147
Mon 8:00 pm134Unhealthy for Sensitive Groups39.340107
Mon 11:00 pm101Unhealthy for Sensitive Groups61.76282
Tue 2:00 am104Unhealthy for Sensitive Groups68.97051
Tue 5:00 am110Unhealthy for Sensitive Groups686942
Tue 8:00 am124Unhealthy for Sensitive Groups51.25387
Tue 11:00 am129Unhealthy for Sensitive Groups24.926183
Tue 2:00 pm128Unhealthy for Sensitive Groups25.126190
Tue 5:00 pm162Unhealthy2828155
Tue 8:00 pm148Unhealthy for Sensitive Groups33.334101
Tue 11:00 pm124Unhealthy for Sensitive Groups57.55970
Wed 2:00 am123Unhealthy for Sensitive Groups77.18034

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 Hải Dương today

Between 6 am and 9 pm local time, the cleanest air today is forecast around 10:00 am (AQI 100, Moderate) and the worst around 6:00 pm (AQI 151). That is a swing of 51 points, so a run or walk around 10:00 am is noticeably better.

Hải Dương vs the rest of Vietnam

Across 36 Vietnam cities we track, the average US AQI right now is 83 (Moderate). Hải Dương at 107 is 24 points worse than average.

For context, the median across 1,416 cities worldwide is 69.

Air quality in cities near Hải Dương

CityDistanceUS AQICategoryPM2.5 µg/m³
Kiến An34 km93Moderate26.6
Haiphong37 km93Moderate26.6
Tương Mai50 km109Unhealthy for Sensitive Groups66.4
Hoàn Kiếm51 km109Unhealthy for Sensitive Groups66.4
Hai Bà Trưng51 km109Unhealthy for Sensitive Groups66.4
Hanoi52 km109Unhealthy for Sensitive Groups66.4
Đống Đa53 km109Unhealthy for Sensitive Groups66.4
Ba Dinh54 km109Unhealthy for Sensitive Groups66.4

Model vs measured

We found no measured PM2.5 sensor cell within 25 km of Hải Dương, 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 71 µg/m³ in the next 24 hours while NASA satellites detected 146 fire hotspots within 300 km in the last day (nearest about 22 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 107, 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 AQICategoryWhat it means
0-50GoodAir quality is satisfactory and poses little or no risk; a good time for outdoor activity.
51-100ModerateAcceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors.
101-150Unhealthy for Sensitive GroupsPeople with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors.
151-200UnhealthyEveryone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed.
201-300Very UnhealthyHealth alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors.
301-500HazardousEmergency 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 Hải Dương

Air quality elsewhere

Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS), NASA FIRMS.