Sample snapshot — search a route to replace this with your origin, destination, and travel date.
Origin (departure city)
Suzhou
55 Suzhou (苏州)
Moderate — Air is acceptable, but there may be a moderate health concern for a small number of sensitive people.
For travelers: Most travelers are fine; consider a mask if you are asthmatic, elderly, or traveling with young children on heavy-traffic days.
Main driver today: Ozone (O₃) — Forms on sunny days from other pollutants — can irritate lungs during afternoon outdoor activity.
Supporting readings (what the numbers are)
- Fine particles (PM2.5) 42Tiny soot and dust from traffic, coal, and industry — the usual driver of smog in Chinese cities.
- Coarse dust (PM10) 30Larger particles from roads, construction, and wind-blown dust.
- Ozone (O₃) drives index 54.5Forms on sunny days from other pollutants — can irritate lungs during afternoon outdoor activity.
- Nitrogen dioxide (NO₂) 22.9A traffic-related gas — higher near busy roads and rail approaches.
- Carbon monoxide (CO) 4.6From incomplete fuel burning — usually low outdoors but worth noting in tunnels or heavy traffic.
Loading weather…
Upcoming holidays
Official public holidays in the next ~8 weeks. Run a train search to see how they line up with your travel date.
