SmogRank / World / Europe / Iceland / Capital Region

Most polluted cities in Capital Region, Iceland

2 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Reykjavík at 2.4 µg/m³, #2,839 in the world.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

Capital Region: 2 measured citiesSouthSouthern PeninsulaWest#2 Garðabær: 1.8 µg/m³#1 Reykjavík: 2.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Reykjavík 0%
  2. 2Garðabærlast full day 2 Oct 0%
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

Estimated: cities without a monitor

Capital Region cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Kópavogur≈ 3 µg/m³Good

Use this board

SmogRank, most polluted cities in Capital Region, Iceland, PM2.5, last 30 days to 6 Oct 2026, 23:00 UTC, smogrank.com/is/region/capital-region?w=30d.

Download top 10 (PNG)

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.

Updated 2026-10-06 23:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.