What is the air quality trend in Siwei?

Over the past 8 days, Siwei had an average AQI of 66 based on station measurements. The worst day was 2026-05-23 with AQI 81.

How is Siwei air quality measured?

Air quality in Siwei is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Siwei, China

Name: Siwei Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Siwei, China.

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

157h

PM2.5 Station

157h · 5 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-29	61	35–80	17.2 µg/m³	19h	3
2026-05-28	58	40–78	16.2 µg/m³	21h	3
2026-05-27	73	48–125	22.4 µg/m³	23h	3
2026-05-26	67	36–97	19.9 µg/m³	23h	3
2026-05-25	52	13–96	13.8 µg/m³	23h	3
2026-05-24	62	13–114	17.8 µg/m³	22h	3
2026-05-23	81	40–164	27.0 µg/m³	23h	3
2026-05-22	78	60–95	24.9 µg/m³	3h	2

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