SmogRank / World / Finland / Uusimaa / August 2026

Most polluted cities in Uusimaa, Finland, August 2026

6 cities in Uusimaa, Finland ranked by their average PM2.5 over the 31 days. Worst: Laaksolahti at 5.5 µg/m³, #2,615 of 2,866 cities in the world. Cleanest: Hämeenkylä at 4.4. A city needs measurements on 70% of the days to be ranked.

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.

← Laaksolahti 0% 0.75%0
Every city in Uusimaa, Finland ranked for August 2026, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Laaksolahti
    0%
  2. 1Helsinki
    0%
  3. 3Vantaa
    0%
  4. 3Lohja
    0%
  5. 5Kallahti
    0%
  6. 6Hämeenkylä
    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

All cities in the world, August 2026 · All cities in Finland, August 2026 · Uusimaa now

Use this board

SmogRank, most polluted cities in Uusimaa, Finland, PM2.5, August 2026, smogrank.com/fi/region/uusimaa/history/2026-08 (accessed 6 Oct 2026).

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.