What is the air quality trend in Sønderborg?

Over the past 15 days, Sønderborg had an average AQI of 40 based on station measurements. The worst day was 2026-07-12 with AQI 70.

How is Sønderborg air quality measured?

Air quality in Sønderborg 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 Sønderborg, Denmark

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

Historical PM2.5 and AQI trend from monitoring stations near Sønderborg, Denmark.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

214h

PM2.5 Station

214h · 1 station

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	24	24–25	5.9 µg/m³	2h	1
2026-07-21	33	14–55	7.9 µg/m³	14h	2
2026-07-20	57	6–173	18.8 µg/m³	18h	1
2026-07-19	40	14–137	11.0 µg/m³	14h	1
2026-07-18	35	8–66	8.6 µg/m³	17h	1
2026-07-17	46	12–83	11.7 µg/m³	18h	1
2026-07-16	43	11–76	11.3 µg/m³	16h	1
2026-07-15	52	14–170	16.7 µg/m³	18h	1
2026-07-14	38	11–65	9.7 µg/m³	14h	1
2026-07-13	37	17–97	9.7 µg/m³	15h	1
2026-07-12	70	6–414	44.1 µg/m³	14h	1
2026-07-11	37	12–76	9.5 µg/m³	17h	1
2026-07-10	33	6–104	8.8 µg/m³	14h	1
2026-07-09	32	5–71	8.1 µg/m³	12h	1
2026-07-08	27	10–46	6.5 µg/m³	11h	1

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