What is the air quality trend in Viersen?

Over the past 15 days, Viersen had an average AQI of 36 based on station measurements. The worst day was 2026-05-24 with AQI 43.

How is Viersen air quality measured?

Air quality in Viersen 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 Viersen, Germany

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

337h

PM2.5 Station

337h · 10 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	40	33–45	9.5 µg/m³	23.6	5h	17
2026-05-29	42	23–123	10.6 µg/m³	23.2	24h	20
2026-05-28	34	26–55	8.3 µg/m³	14.9	24h	21
2026-05-27	39	25–52	9.4 µg/m³	17.5	24h	19
2026-05-26	36	25–52	8.7 µg/m³	11.1	24h	19
2026-05-25	34	25–57	8.1 µg/m³	9.9	24h	20
2026-05-24	43	30–63	10.6 µg/m³	17.3	24h	22
2026-05-23	40	29–51	9.6 µg/m³	18.0	24h	20
2026-05-22	37	31–57	8.9 µg/m³	15.3	24h	19
2026-05-21	34	26–52	8.2 µg/m³	12.2	24h	21
2026-05-20	39	19–151	10.8 µg/m³	7.6	24h	20
2026-05-19	31	21–75	7.8 µg/m³	7.9	24h	21
2026-05-18	34	20–152	8.9 µg/m³	8.2	24h	21
2026-05-17	33	19–156	9.0 µg/m³	6.9	24h	20
2026-05-16	30	4–53	7.2 µg/m³	9.4	20h	18

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