Air quality in Lahti, Päijät-Häme, Finland today

Mr. Duck’s Air Quality Score

Good air today for Lahti, Päijät-Häme, 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 Lahti today is classified as Good. The primary pollutant measured is PM2.5, with a reference value of 4.957045 µg/m³, while PM10 shows a reference value of 7.318875 µg/m³ based on six valid measurements.

Data are shown via OpenAQ and reflect the current monitoring results for the city. 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 Lahti air‑quality feed contains data for four pollutants – nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM10) and particulate matter 2.5 µm or less (PM2.5). In total eight measurement rows are available, coming from five distinct monitoring stations across the city. Freshness varies by pollutant: the most recent NO₂ reading was recorded on 2026‑02‑10 at 18:00 UTC, and the same timestamp applies to the latest PM10, O₃ and PM2.5 values, so every pollutant has a data point that is no older than three days.

Across the eight rows the concentration ranges differ markedly. NO₂ shows the widest spread, with values as low as about 9.7 µg/m³ and up to 48.4 µg/m³; the median sits near 23 µg/m³, while the 10th‑percentile is roughly 12 µg/m³ and the 90th‑percentile approaches 42 µg/m³. By contrast PM10 values are tightly clustered between 6.0 and 7.3 µg/m³, median 6.7 µg/m³, and both percentiles sit close to those limits. O₃ is represented by a single measurement of 59.33 µg/m³, and PM2.5 likewise by one value of 4.96 µg/m³, so no spread can be described for these two pollutants.

The dataset also reveals uneven coverage: four rows provide NO₂ data, two rows report PM10, while O₃ and PM2.5 each have only a single observation. Although all readings are recent, the limited number of stations for ozone and fine particles means city‑wide conditions may differ from what is captured at those specific sites.

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 data shown reflects six valid measurements and is Updated within 3 days, with the latest values recorded at 2026‑02‑10T18:00:00+00:00. These figures provide a recent snapshot of air quality in Lahti, Päijät‑Häme, but conditions can differ across neighborhoods and change throughout the day, so local variations may not be captured by this summary.

OpenAQ station rows