Is the air quality good in Shanghai?
On October 13, 2025 at 1:30 AM PT, air quality in Shanghai, China is poor with an AQI of 158, due to high levels of fine particulate matter (PM2.5).
These levels are categorized as unhealthy for the general population, especially during stagnant weather events that trap pollutants near the surface.
Air quality is dynamic and, like the weather, can change frequently. Shanghai ranked 2nd among the most polluted major city in the world today morning, with nearby cities like Hangzhou also affected.
Click here for a real-time air quality map of Shanghai.
While the air quality conditions today are unusually poor, it is important to keep in mind that the average PM2.5 concentration in 2024 for Shanghai was 28.2 µg/m³. This corresponds to an AQI of 84, which falls into the moderate category and was 5.6 times the WHO annual guideline.
Shanghai, China ranked as the 2nd most polluted major city on Oct 13, 2025 at 1:30 AM PT. Source: IQAir.
When will air quality improve in Shanghai?
The hourly forecast suggests that air quality will remain poor throughout the day and improve slightly tomorrow.
Hourly air quality forecast for Shanghai, China on Oct 13, 2025. Source: IQAir.
Air quality improvement in Shanghai is expected gradually over the coming months as meteorological conditions shift and targeted emission control measures continue to take effect.
The study suggests that reducing ammonia (NH3) and volatile organic compounds (VOCs) would be the most effective strategies to mitigate nitrate formation and overall PM2.5 levels (1).
Short-term improvement may occur with increased precipitation and stronger winter winds dispersing pollutants. However, during stagnant or humid conditions, particulate accumulation is likely to persist.
Air quality map of Shanghai, China on Oct 13, 2025. Source: IQAir.
What is causing poor air quality in Shanghai?
The resurgence of poor air quality in Shanghai is primarily driven by nitrate-dominated PM2.5 pollution. Researchers found that volatile organic compounds (VOCs), relative humidity, and ammonia (NH3) are the most influential factors enhancing particulate nitrate formation during winter pollution episodes (1).
- Key chemical drivers: VOCs, NH3, and high relative humidity.
- Seasonal triggers: Winter stagnation and limited vertical dispersion.
How can I protect myself from poor air quality?
- Get a free air quality app for real-time air quality alerts and forecasts.
- Shut doors and windows and set the HVAC to recirculate mode.
- Contribute to your community’s outdoor air quality data.
- Stay indoors when air quality is poor; if you do need to go outdoors, wear a KN95/FFP2 mask.
- Run a high-performance air purifier to filter particles, gases, and other pollutants.
