Air quality in Târgu Mureș, Romania today

Mr. Duck’s Air Quality Score

Unhealthy air today for Târgu Mureș, Romania

⚠️ 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 Târgu Mureș is currently classified as Unhealthy. The main pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 76.02 µg/m³ and a PM10 level of 39.17 µg/m³, based on twelve valid observations.

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 Târgu Mureș contains measurements from 17 recorded rows supplied by four monitoring sites. All the standard air‑quality variables are present: nitrogen dioxide (NO₂) up to a maximum of 49.05 µg/m³, ozone (O₃) reaching 34.86 µg/m³, carbon monoxide (CO) as high as 320.42 µg/m³, particulate matter 10 µm (PM₁₀) peaking at 39.17 µg/m³, sulphur dioxide (SO₂) up to 5.32 µg/m³, and the finer fractions PM₁ (46.28 µg/m³) and PM₂.₅ (76.02 µg/m³). Relative humidity is also recorded at a single value of 49.22 %. The most recent timestamps are from 2026‑02‑10 19:00 UTC for NO₂, O₃, CO, PM₁₀ and SO₂, while the particulate‑size specific stations (PM₁, PM₂.₅ and humidity) were last updated at 2026‑02‑10 20:00 UTC.

Across the pollutants the observed ranges differ markedly. NO₂ shows a spread from about 10 µg/m³ to 49 µg/m³ with a median near 42 µg/m³, while O₃ varies only between roughly 25 and 35 µg/m³, indicating a tighter distribution. CO is the most variable, swinging from a negative placeholder value of –1000 µg/m³ up to 320 µg/m³; the median sits at –340 µg/m³, suggesting many low or erroneous readings alongside occasional high spikes. PM₁₀ values are clustered between 27 and 39 µg/m³ with a median of 33 µg/m³, whereas SO₂ ranges from –1 to just over 5 µg/m³, again showing a narrow band around the median of about 2 µg/m³.

The coverage is uneven: three pollutants (NO₂, O₃, CO) have three rows each, PM₁₀ and SO₂ have two rows each, while PM₁, PM₂.₅ and humidity are represented by a single row from the Depozitelor site. Because many entries are recent (all within the last few hours of 2026‑02‑10) the data reflects conditions at that specific moment, but the limited number of rows for some parameters means city‑wide variations may not be fully captured.

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 Târgu Mureș is based on twelve valid measurements and was refreshed within three days, with the latest update recorded at 2026‑02‑10 20:00 UTC. These values represent a snapshot of conditions across the monitoring network; actual air quality can differ by specific location and time of day within the city.

OpenAQ station rows