According to Shanghai Municipal Bureau of Ecology and Environment, due to the significant reduction in the impact of precipitation in the city from yesterday night to today, and the remaining sand and dust air masses on the surface of the Northeast sea, it is expected that the city will be affected by the transportation of sand and dust on the sea and PM10 pollution will occur from this morning (30th). The process can reach serious pollution in a short time.

It is estimated that ：

This morning, the pollution index was 490-510, severe pollution, and the primary pollutant PM10

In the afternoon

390-410, severe pollution

At night

185-205, moderate to severe pollution

On the 31st

95-115, mild pollution

On April 1st

40-60, excellent to good