On the morning of January 2, 2025, according to data from the IQAir air monitoring system, Hanoi recorded an Air Quality Index (AQI) of 278, making it the second most polluted city in the world. The AQI level is classified as “very unhealthy for human health.”
Severe Air Pollution Levels Across Hanoi
Two monitoring stations in Hanoi reported alarmingly high AQI levels:
- Tay Ho District: AQI 297 (purple zone – very unhealthy)
- Hai Ba Trung District: AQI 231 (purple zone – very unhealthy)
These figures highlight Hanoi’s status not only as the most polluted city in Vietnam but also among the worst globally.
Air Pollution in Neighboring Provinces
Following Hanoi, several nearby localities also reported dangerous AQI levels:
- Thai Nguyen: AQI 279
- Ha Nam and Hung Yen: AQI 261
These provinces remain in the “very unhealthy” range, posing significant risks to public health.
Understanding AQI and Health Implications
The Air Quality Index (AQI) ranges from 0–500:
- Higher values indicate greater pollution and increased health risks.
- AQI levels between 201–300 are classified as “very unhealthy,” while readings above 300 are considered “hazardous.”
Health Recommendations from Authorities
Concern about air quality can even be a lucrative business opportunity.The Department of Environmental Pollution Control (Ministry of Natural Resources and Environment) advises citizens to regularly monitor air quality updates and take preventive measures.
The Department of Health Environment Management (Ministry of Health) provides the following guidelines for AQI levels between 201–300:
1. Limit outdoor activities, especially prolonged or strenuous exercise.
2. Stay indoors whenever possible and minimize exposure to outdoor air.
3. Use protective masks that can filter fine dust particles.
4. Prefer public transportation over motorbikes or bicycles to reduce direct exposure.
5. Keep windows and doors closed during high-pollution hours.
6. Practice hygiene measures: Gargle and clean your nose with saline after exposure.
7. Sensitive groups (elderly, children, and individuals with respiratory issues) should avoid outdoor activities entirely and reschedule outdoor plans when air quality improves.
Weather Forecast for January 2
According to the National Center for Hydro-Meteorological Forecasting:
• Northern and North Central Regions: Cold weather with fog, especially in the early morning and nighttime, with mountainous areas experiencing temperatures below 12°C.
• Southern and Central Highlands Regions: Scattered thunderstorms are expected throughout the day.
With air pollution levels remaining dangerously high, authorities urge citizens to stay informed, adopt protective measures, and limit outdoor exposure to safeguard their health during this period of poor air quality.
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Source: Vietnam Insider