Air quality in Dej, Romania today

Mr. Duck’s Air Quality Score

Moderate air today for Dej, 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 Dej is currently classified as Moderate. The primary pollutant identified is PM2.5, fine particulate matter, with a measured concentration of approximately 25.96 µg/m³. In addition, the level of PM10 has been recorded at about 28.98 µg/m³ based on twelve valid observations.

These values are presented through OpenAQ data and reflect the latest available measurements 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 dataset for Dej contains measurements of six key pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter 10 µm or less (PM10), particulate matter 2.5 µm or less (PM2.5) and sulfur dioxide (SO₂). These values come from a total of sixteen data rows collected at two monitoring stations, each row representing an individual observation.

All pollutants have been recorded within the last seven days, but the freshness varies across the dataset. Twelve of the rows were updated in the past three days, while four rows are older than seven days; no entries are marked as unknown or missing for the most recent period. The latest timestamps for each pollutant are from 2026‑02‑10 19:00 UTC, indicating that the newest data are just a few days old.

The measured concentrations show limited variability in several cases. CO is reported at a single value of 152.01 µg/m³ and SO₂ at 8.12 µg/m³, both with no observed range across the rows. In contrast, O₃ spans from 29.66 to 111.24 µg/m³, while PM10 ranges from 28.98 to 98.83 µg/m³ and PM2.5 from 25.96 to 94.21 µg/m³, suggesting broader fluctuations for the oxidants and particulates. NO₂ is recorded at a single value of 26.36 µg/m³ in this snapshot.

Overall, the data provide recent coverage for all six pollutants but are unevenly distributed: some contaminants show only one reported level, whereas others exhibit a wider spread. Because observations come from just two stations and a handful of rows are older than a week, the picture may not capture short‑term spikes or spatial differences across 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 shown for Dej reflects twelve valid measurements and is updated within 3 days, with the latest reading recorded on 2026‑02‑10 at 19:00 UTC. This snapshot provides a recent overview of ambient conditions, but air quality can differ across neighborhoods and change throughout the day, so local variations may not be captured in these figures.

OpenAQ station rows