SmogRank / Norway / Vestland / Åsane

Åsane, month by month

Åsane has a measured daily mean on 933 days since 1 January 2023. Its worst month was March 2026, at 45 US AQI (8.1 µg/m³), 2,114th of 2,971 cities on that month's world ranking. Its cleanest was September 2025, at 14 US AQI (2.6 µg/m³). 2025 averaged 24 US AQI (4.4 µg/m³), against 23 US AQI (4.2 µg/m³) in 2024.

Every month since 2023

2026too few days for a mean (a year needs 199)165 days measured
Jan33#2,122Feb20#2,774Mar45#2,114Apr17#2,865May19#2,743Jun20#2,363Jul2 daysAugnoneSepnoneOctnone
202524 for the year299 days measured2,604th of 2,681 in the world
Jan30#2,142Feb19#2,574Mar32#2,351Apr21#2,834May23#2,545Jun24#2,361Jul34#2,236Aug21#2,831Sep14#3,078Oct9 daysNovnoneDec19 days
202423 for the year349 days measured2,036th of 2,097 in the world
Jan39#1,490Feb19#2,393Mar19#1,578Apr18#2,373May28#2,246Jun24#2,326Jul17#2,522Aug25#1,934Sep25#1,862Oct19#1,975Nov22#2,458Dec19#2,519
2023too few days for a mean (a year needs 256)120 days measured
Jan22#1,180Feb29#1,057Mar15#902Apr16#1,569May7 daysJunnoneJul1 dayAugnoneSepnoneOctnoneNovnoneDecnone
Each square is a month's mean PM2.5 in US AQI from Åsane's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Åsane marked; each year, the year's.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

15 months
MonthWhy
Oct 2026No day measured. The others: 11 with readings for part of the day (a day needs 18 hours).
Sep 2026No day measured. The others: 30 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20262 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks.
Dec 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Nov 2025No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 20259 of 31 days measured; a month needs 22. The others: 22 with under 18 hours of readings or readings that failed our checks.
Dec 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Nov 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Oct 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Sep 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
Aug 2023No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
Jul 20231 of 31 days measured; a month needs 22. The others: 30 with under 18 hours of readings or readings that failed our checks.
Jun 2023No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks.
May 20237 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Åsane's worst months

MonthUS AQIDays measuredWorld rank
March 2026 458.1 µg/m³27 of 312,114thof 2,971
January 2024 397.1 µg/m³28 of 311,490thof 2,385
July 2025 346.2 µg/m³31 of 312,236thof 2,889
January 2026 336.0 µg/m³29 of 312,122ndof 2,617
March 2025 325.7 µg/m³31 of 312,351stof 2,862
January 2025 305.4 µg/m³31 of 312,142ndof 2,474

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Åsane's worst days

DayUS AQI
6 Mar 2026 8125.1 µg/m³
15 Jan 2025 7321.1 µg/m³
9 Mar 2025 7220.2 µg/m³
6 Sept 2024 7019.5 µg/m³
7 Mar 2026 7019.2 µg/m³
11 Feb 2023 6617.0 µg/m³
6 Jan 2024 6416.2 µg/m³
2 May 2025 6415.9 µg/m³
7 Sept 2024 6315.8 µg/m³
28 Jan 2026 6215.2 µg/m³

Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Åsane, Norway, 1 Jan 2023 – 2 Jul 2026. Monitor data from EEA, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/no/asane/history (accessed 12 Oct 2026).

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You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Åsane now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 18:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).