What is the air quality trend in Willich?

Over the past 15 days, Willich had an average AQI of 40 based on station measurements. The worst day was 2026-05-30 with AQI 51.

How is Willich air quality measured?

Air quality in Willich 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 Willich, Germany

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

Historical PM2.5 and AQI trend from monitoring stations near Willich, Germany.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

336h

PM2.5 Station

336h · 6 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	51	31–102	14.3 µg/m³	14.6	6h	20
2026-05-29	44	28–86	11.3 µg/m³	8.9	24h	24
2026-05-28	40	28–55	9.7 µg/m³	2.1	24h	24
2026-05-27	37	25–52	9.0 µg/m³	8.4	24h	25
2026-05-26	40	23–62	9.7 µg/m³	4.6	24h	25
2026-05-25	45	28–152	12.3 µg/m³	5.7	24h	24
2026-05-24	39	29–62	9.5 µg/m³	15.1	24h	28
2026-05-23	41	31–97	10.4 µg/m³	15.8	24h	27
2026-05-22	43	30–152	11.2 µg/m³	12.7	24h	24
2026-05-21	40	24–122	10.6 µg/m³	7.9	24h	26
2026-05-20	41	21–152	10.7 µg/m³	5.3	24h	25
2026-05-19	36	23–75	9.2 µg/m³	6.4	24h	23
2026-05-18	40	19–119	10.3 µg/m³	7.9	24h	25
2026-05-17	34	23–67	8.2 µg/m³	6.2	24h	20
2026-05-16	41	24–62	10.1 µg/m³	7.2	18h	22

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