What is the air quality trend in Harpen?

Over the past 8 days, Harpen had an average AQI of 36 based on station measurements. The worst day was 2026-10-16 with AQI 40.

How is Harpen air quality measured?

Air quality in Harpen 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 Harpen, Germany

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 18 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-10-21	40	32–50	9.7 µg/m³	17.8	10h	18
2026-10-20	36	23–57	8.8 µg/m³	15.4	24h	17
2026-10-19	35	18–52	8.3 µg/m³	16.1	24h	17
2026-10-18	38	25–63	9.4 µg/m³	7.8	24h	17
2026-10-17	39	25–56	9.4 µg/m³	15.4	24h	16
2026-10-16	40	26–62	9.9 µg/m³	7.9	24h	15
2026-10-15	33	23–60	8.0 µg/m³	5.2	24h	16
2026-10-14	31	27–41	7.5 µg/m³	7.8	11h	20

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