SmogRank / World / Norway / Akershus / May 2025

Most polluted cities in Akershus, Norway, May 2025

2 cities in Akershus, Norway ranked by their average PM2.5 over the 31 days. Worst: Strømmen at 5.0 µg/m³, #2,248 of 2,771 cities in the world. Cleanest: Lillestrøm at 5.0. A city needs measurements on 70% of the days to be ranked.

  1. 1Strømmen
    28
  2. 1Lillestrøm
    28
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

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SmogRank, most polluted cities in Akershus, Norway, PM2.5, May 2025, smogrank.com/no/region/akershus/history/2025-05 (accessed 7 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.