Air quality in Capital City of Prague, Prague, Czechia today

Mr. Duck’s Air Quality Score

Unhealthy air today for Capital City of Prague, Prague, Czechia

⚠️ 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 Prague today is classified as Unhealthy. The primary pollutant identified is PM2.5, with a measured concentration of 59.58 µg/m³. In addition, the PM10 level is recorded at 8.6 µg/m³ based on 42 valid measurements from OpenAQ data.

These figures reflect the current assessment for the capital 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 OpenAQ feed for Prague currently provides data on eleven measured substances: carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO2), ozone (O3), particulate matter of 1 µm (PM1), 2.5 µm (PM2.5) and 10 µm (PM10), relative humidity, sulfur dioxide (SO2), temperature and the auxiliary variable UM003. The dataset comprises 75 rows from 17 distinct monitoring stations across the city. Freshness varies by pollutant: the most recent observations are from 2026‑02‑10 for PM10, NO2, O3, PM1, relative humidity and temperature (all recorded between 14:00 and 18:00 UTC), while nitrogen oxide (NO) is only available from an older entry dated 2024‑03‑11. No recent values are present for CO, SO2 or UM003 in the current snapshot.

Across the pollutants with up‑to‑date records, concentrations show a wide spread. PM10 values range from a low of 8 µg/m³ to a high of 177 µg/m³, with a median near 20 µg/m³; NO2 spans 6.7–36.3 µg/m³ (median 15.5 µg/m³); PM2.5 varies from essentially zero up to almost 60 µg/m³ (median 12.7 µg/m³). Ozone is comparatively stable, staying between 43.9 and 55.3 µg/m³ with a median of 49.7 µg/m³. Temperature readings are clustered between roughly 7 °C and 20.5 °C (median 18.7 °C), while relative humidity covers 36 % to 82 % (median about 56 %). The number of stations reporting each pollutant differs: PM10, NO2 and O3 have data from 16, 10 and 6 stations respectively; PM1, temperature and humidity are represented by only five stations each, and NO is limited to nine stations with older timestamps.

Because many rows are classified as “old” (14) or “unknown” (17), the overall picture reflects a mix of recent and dated information. Consequently, conditions can differ noticeably between neighborhoods and over time, especially for pollutants like NO that lack current measurements. Users should keep in mind that the available data capture only snapshots from specific sites rather than a continuous city‑wide record.

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 Prague includes 42 valid measurements and is updated within 3 days, with the latest values recorded at 2026‑02‑10T18:00:00+00:00. These figures represent a snapshot of current conditions; air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in this summary.

OpenAQ station rows