Air quality in Ústí nad Labem, Northwest, Czechia today

Mr. Duck’s Air Quality Score

Moderate air today for Ústí nad Labem, Northwest, 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 today in Ústí nad Labem is classified as Moderate. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 20.6 µg/m³ and a PM10 reference value of 37.9 µg/m³, based on ten valid observations collected via OpenAQ.

These figures reflect the current assessment 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 air‑quality dataset for Ústí nad Labem contains measurements for seven pollutants – carbon monoxide (CO), nitrogen oxide (NO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm (PM₁₀), particulate matter 2.5 µm (PM₂.₅) and sulphur dioxide (SO₂). These values come from three monitoring stations, giving a total of sixteen individual rows of data. Freshness varies across the set: the most recent CO reading was recorded on 2026‑02‑10 at 14:00 UTC, while the newest NO measurement dates back to 2024‑03‑11 at 10:00 UTC; all other pollutants have their latest updates also on 2026‑02‑10 at 14:00 UTC. No rows are flagged as unknown or very old, but five of the sixteen entries are marked as “old” (pre‑2025), meaning that a portion of the record reflects conditions from earlier periods.

Across the pollutants, observed concentrations span a wide range. NO values range from a low of 1.9 µg/m³ to a high of 16.0 µg/m³, with a median around 3.2 µg/m³; NO₂ shows a broader spread from 8.8 µg/m³ up to 28.5 µg/m³ and a median near 16.8 µg/m³. Particulate matter is relatively tight: PM₁₀ varies between 20.8 and 37.9 µg/m³ (median 23.8), while PM₂.₅ stays close to its limits, ranging only from 19.2 to 20.6 µg/m³ (median 19.9). Ozone levels are the most variable, with a minimum of 9.0 µg/m³ and a peak of 45.1 µg/m³; the median sits at 27.05 µg/m³. Sulphur dioxide is low throughout the record, from 2.7 to 4.3 µg/m³ (median 3.5). CO stands out as a single‑point measurement of 384.42 µg/m³ recorded at the Všeborická station.

Overall, the dataset offers a fairly complete snapshot of key pollutants for Ústí nad Labem, but coverage is uneven: three stations provide data for most gases and particles, yet only one station reports CO, and the NO series includes an older entry from 2024. Because measurements are taken at different times and some rows are dated, conditions can differ across locations and moments within the city.

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 set for Ústí nad Labem includes ten valid measurements and is refreshed regularly, having been updated within three days (last update on 2026‑02‑10 at 14:00 UTC). This snapshot reflects conditions recorded across the city’s monitoring network at that time; however, air quality can vary by location and moment within Ústí nad Labem, so values may differ elsewhere or later.

OpenAQ station rows