Air quality in Wejherowo, Poland today

Mr. Duck’s Air Quality Score

Very unhealthy air today for Wejherowo, Poland

⚠️ 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 Wejherowo is classified as Very Unhealthy today. The primary pollutant identified is PM2.5 (fine particles).

Measurements from five valid observations show a PM2.5 concentration of 142.71 µg/m³. 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 dataset for Wejherowo contains a single monitoring station, Wejherowo Śmiechowo północ, which supplies six different measurements: PM1, PM10, PM2.5, relative humidity, temperature and particle concentration (UM003). Because there is only one row of data, the coverage is limited to this location; no city‑wide network of stations is represented.

The most recent readings are from 2026‑02‑10 20:00 UTC for five of the parameters (PM1, PM2.5, relative humidity, temperature and UM003), indicating that those values are up‑to‑date within the last week. The PM10 measurement is older, last updated on 2024‑09‑25 05:00 UTC, so it reflects conditions from more than a year ago. All six pollutants have a single recorded value, which also serves as their minimum, median and maximum because no additional rows exist to show variation over time.

From the available numbers, PM2.5 registers at 142.71 µg/m³ while PM1 is 72.99 µg/m³ and PM10 is 27.27 µg/m³, showing a clear gradient with finer particles present in higher concentrations at this site. Relative humidity stands at about 50.73 % and temperature is 4.69 °C, giving a snapshot of the ambient climate when the measurements were taken. The particle counter (UM003) reports roughly 12 677 particles per cubic centimetre.

Overall, the data set offers a very narrow view: one location, six pollutants, and only five of them refreshed within the past week. Because most parameters are based on a single recent observation, they cannot convey daily or seasonal fluctuations across Wejherowo. Users should keep in mind that conditions may differ elsewhere in the city or change rapidly after the timestamp shown.

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 for Wejherowo is based on five valid measurements and was refreshed recently, with the latest update recorded at 2026‑02‑10T20:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of sampling; air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows