Air quality in Helsinki, Uusimaa, Finland today

Mr. Duck’s Air Quality Score

Moderate air today for Helsinki, Uusimaa, Finland

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Helsinki today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 9.03 µg/m³ and a PM10 level of 11.32 µg/m³, based on twelve valid observations.

Data is shown via OpenAQ. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The Helsinki air‑quality dataset currently includes five measured pollutants – nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM₁₀), particulate matter ≤2.5 µm (PM₂.₅) and sulphur dioxide (SO₂). Data come from 14 recent‑time rows collected at four monitoring stations, with the most recent updates recorded on 2026‑02‑10 at 18:00 UTC for NO₂, O₃, PM₁₀ and PM₂.₅, and at 16:00 UTC for SO₂. No data are flagged as “today”, but twelve rows were updated within the last three days, while two older entries remain in the set.

Across the pollutants the observed values show a modest spread. NO₂ ranges from about 14.8 µg/m³ up to 27.4 µg/m³, with a median near 21.6 µg/m³; the highest single reading (27.27703 µg/m³) was recorded at Vartiokylä Huivipolku. O₃ values sit between roughly 43 and 60 µg/m³, median 51.7 µg/m³, again measured at Vartiokylä Huivipolku. PM₁₀ concentrations vary from 2.3 to 11.3 µg/m³ (median 8.2 µg/m³), while PM₂.₅ spans 4.5 to 9.0 µg/m³ (median 7.2 µg/m³); the peak PM₁₀ and PM₂.₅ readings were also recorded at Vartiokylä Huivipolku. SO₂ is represented by a single recent value of 0.024172 µg/m³ from the Kallio 2 station.

The coverage is uneven: four stations provide data for NO₂, O₃, PM₁₀ and PM₂.₅, but only one station contributes SO₂ measurements. While most rows are fresh (within three days), two older entries remain, meaning that city‑wide conditions can differ by location and time, especially where fewer sensors are present.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The dataset for Helsinki includes twelve valid measurements and is refreshed regularly, having been updated within three days; the latest update was recorded at 2026‑02‑10T18:00:00+00:00. This snapshot reflects conditions measured across the city’s monitoring network but air quality can vary by location and time within Helsinki, so values may differ from what you experience in specific neighborhoods or at different moments.

OpenAQ station rows