Hangzhou Air Quality Guide - Sources, Seasons, and Health Implications

A guide to air quality in Hangzhou, China - sources, seasonal patterns, health implications, and how to track conditions in real time.

Air quality overview

Hangzhou is a city of approximately 7,236,000 residents in China. Based on multi-year averages, its air quality runs moderate, with seasonal swings into unhealthy ranges.

See live readings: Hangzhou live AQI →

What drives air pollution in Hangzhou

The dominant pollution sources affecting China cities like Hangzhou are:

• vehicle exhaust in dense urban centers
• industrial emissions from manufacturing and steel production
• coal-fired power and heating
• long-range dust transport from arid regions (Gobi, Loess Plateau)
• construction and ongoing urbanization

Seasonal pattern

Winter heating season (November-March) dramatically increases pollution loads, especially in cities relying on coal-fired district heating. Spring brings dust storms from continental interiors.

Geography and meteorology

Hangzhou sits at approximately 30.27° latitude, 120.15° longitude. Cities in northern East Asia frequently sit in basins surrounded by mountains, allowing pollution to pool. Coastal cities benefit from sea breezes that disperse pollutants.

Health implications

Sensitive groups should monitor daily readings. Plan outdoor activity for cleaner-air windows. The most-studied pollutant for population health is fine particulate matter (PM2.5). Exposure is linked to cardiovascular disease, respiratory illness, and increased mortality. Children, the elderly, and people with respiratory or cardiac conditions face elevated risk.

Other pollutants commonly elevated in urban areas:

• Ozone (O3) - peaks on hot, sunny afternoons
• Nitrogen dioxide (NO2) - traffic-correlated, peaks at rush hours
• PM10 - includes road dust and coarse particles

Policy and trajectory

China's air-quality progress since 2013 is among the most rapid in history; PM2.5 dropped roughly 40% in major cities. Policies include coal phase-outs, vehicle restrictions, and industrial relocation. Japan and South Korea have stricter standards but face transboundary inflows.

Practical guidance for residents and visitors

1. Check the AQI before outdoor exercise. If readings exceed 100, sensitive groups should reduce intensity. Above 150, everyone should consider shifting indoors.
2. Wear an N95 or KN95 during peaks. Cloth masks do not filter PM2.5.
3. Run a HEPA air purifier in bedrooms. Indoor levels typically track 50-70% of outdoor levels in unfiltered homes - see our air purifier buyer's guide.
4. Use mechanical ventilation with HEPA filtration when AQI is high; avoid simply opening windows.
5. Subscribe to free email alerts for Hangzhou - we email when AQI crosses your threshold: set up alerts →

How we track Hangzhou

Live readings refresh every 30 minutes via atmos.today. See methodology and attribution for data sources.

Compare nearby and notable cities

• Hangzhou vs Beijing
• Hangzhou vs Shanghai
• Hangzhou vs Guangzhou

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Live Hangzhou air quality: /china/hangzhou. Methodology: /about. Reviewed: May 2, 2026.