Air quality in Dupnitsa, Kyustendil, Bulgaria today

Mr. Duck’s Air Quality Score

Moderate air today for Dupnitsa, Kyustendil, Bulgaria

⚠️ 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 Dupnitsa is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 15.7 µg/m³ and a PM10 level of 15.89 µg/m³, based on seven valid observations recorded by OpenAQ.

These values reflect the present conditions without implying any trend or cause. 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 Dupnitsa air‑quality feed contains data for ten measured pollutants – carbon monoxide (CO), humidity, nitrogen dioxide (NO₂), particulate matter of four size fractions (PM1, PM2.5, PM4 and PM10), atmospheric pressure, sulfur dioxide (SO₂) and temperature – collected from two monitoring stations that together contributed 28 recent rows of observations. The most up‑to‑date entries are all within the last three days; for PM‑size fractions, humidity, pressure and temperature the latest timestamp is 2026‑02‑10 22:28 UTC (or 22:29 UTC for PM4), while CO lacks a recent update and is marked as unknown. Seven rows were recorded in the past three days, four in the last seven days and none today; the remaining 17 rows have an unknown freshness status.

Across the particulate metrics the observed values are tightly clustered. PM1 ranged from 10.31 to 14.70 µg/m³ with a median of about 12.0 µg/m³, while PM10 varied between 10.91 and 15.89 µg/m³ (median ≈12.8 µg/m³). PM2.5 showed a similar spread, from 10.91 to 15.70 µg/m³ with a median near 13.0 µg/m³, and PM4 lay between 10.91 and 14.86 µg/m³ (median ≈12.7 µg/m³). These narrow ranges suggest relatively stable particulate concentrations during the reporting window. Humidity stayed within a modest band of 67.57 % to 70.25 % (median ≈68.9 %), pressure hovered around 948.44–948.94 hPa (median ≈948.69 hPa), and temperature covered 3.55 °C to 9.02 °C (median ≈6.3 °C). CO values, however, are only available as a static range of 193.49–197.54 µg/m³ with no recent timestamp, indicating that this pollutant’s data are less current than the others.

Overall the dataset provides a fairly fresh snapshot for most pollutants, but coverage is uneven: particulate matter, humidity, pressure and temperature have recent readings, whereas CO and any SO₂ measurements lack timely updates. Because only two stations contribute the 28 rows, spatial variation within Dupnitsa may not be fully captured, and conditions can differ across neighborhoods or change after the last recorded timestamps.

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 current dataset for Dupnitsa includes seven valid measurements and is updated within three days, with the latest refresh recorded at 2026‑02‑10 22:29 UTC. These figures represent a recent snapshot of ambient conditions, but air quality can differ across neighborhoods and change throughout the day, so values may not reflect conditions at every location or moment in the city.

OpenAQ station rows