What is the air quality trend in Trondheim?

Over the past 8 days, Trondheim had an average AQI of 19 based on station measurements. The worst day was 2026-10-20 with AQI 39.

How is Trondheim air quality measured?

Air quality in Trondheim 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 Trondheim, Norway

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

Historical PM2.5 and AQI trend from monitoring stations near Trondheim, Norway.

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

49h

PM2.5 Station

49h · 2 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-21	26	6–44	6.1 µg/m³	4h	2
2026-10-20	39	20–62	9.9 µg/m³	6h	2
2026-10-19	27	4–47	6.5 µg/m³	7h	2
2026-10-18	12	4–27	2.8 µg/m³	7h	2
2026-10-17	9	3–13	2.0 µg/m³	7h	1
2026-10-16	13	4–23	3.0 µg/m³	7h	1
2026-10-15	14	7–27	3.4 µg/m³	7h	2
2026-10-14	16	7–26	3.7 µg/m³	4h	2

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