Air quality in Kladno, Central Bohemia, Czechia today

Mr. Duck’s Air Quality Score

Good air today for Kladno, Central Bohemia, 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 Kladno today is classified as Good. The primary pollutant measured is PM2.5 (fine particles).

According to OpenAQ data, the PM2.5 reference value is 8.8 and the PM10 reference value is 19.7, based on six valid measurements. 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 Kladno air‑quality dataset contains six measured pollutants – nitrogen monoxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM10), particulate matter ≤ 2.5 µm (PM2.5) and sulphur dioxide (SO₂). Data come from two monitoring stations, giving a total of seven individual rows in the current feed.

Across the pollutants the most recent observations are from 2026‑02‑10 14:00 UTC, so the bulk of the data is less than three days old. The exception is NO, whose latest value dates back to 2024‑03‑11 10:00 UTC and is therefore considerably older than the rest. For PM10 the highest recorded concentration in the recent window is 19.7 µg/m³ (median 14.05 µg/m³, minimum 8.4 µg/m³), while the spread for this pollutant runs from about 9.5 µg/m³ at the 10th percentile up to 18.6 µg/m³ at the 90th percentile. PM2.5 shows a single recent value of 8.8 µg/m³, and O₃ is reported consistently at 49.9 µg/m³. NO₂ and SO₂ each have one recent measurement as well, 14.9 µg/m³ and 3.5 µg/m³ respectively.

The coverage is uneven: three pollutants (PM10, O₃, PM2.5) are reported from two different stations, while the remaining three (NO, NO₂, SO₂) rely on a single station’s data. Most rows are fresh, but the older NO reading highlights that not all parameters are updated with the same frequency. Consequently, while the dataset gives a clear snapshot of current conditions for most pollutants, variations across locations and times within Kladno may not be fully captured by the available rows.

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 Kladno are based on six valid measurements and were refreshed recently, with the latest update recorded at 2026‑02‑10T14:00:00+00:00 (updated within 3 days). This snapshot reflects conditions at the time of sampling; air quality can vary across different locations and times within the city, so values may differ from what you experience elsewhere in Kladno.

OpenAQ station rows