Air quality in Kathmandu Metropolitan City, Bagamati Province, Nepal today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Kathmandu Metropolitan City, Bagamati Province, Nepal

⚠️ 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 Kathmandu Metropolitan City is classified as USG. The main pollutant identified is PM2.5 (fine particles). This assessment is based on data shown via OpenAQ. The monitoring effort includes multiple sensors across the metropolitan area. The overall classification reflects the combined observations for the day.

The reported PM2.5 concentration is 47.0 µg/m³, representing the average of 36 valid measurements. A total of 36 valid measurements contributed to the reported value. The concentration figure is expressed in micrograms per cubic meter. No PM10 value is reported for this assessment. All observations were recorded on the reporting date, providing a snapshot of ambient conditions. 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 Kathmandu Metropolitan City currently contains measurements for seven pollutants – ozone (O3), particulate matter of 1 µm (PM1), 2.5 µm (PM2.5), 10 µm (PM10), relative humidity, temperature and particle count (UM003). In total 50 rows of observations are recorded across 11 monitoring stations. Thirty‑six of those rows have been updated within the last 30 days, eight are classified as old and six have an unknown update status, so the overall picture is fairly recent but not uniformly fresh for every pollutant.

PM2.5 is the most widely reported, with 11 stations providing data that were last refreshed on 2026‑02‑10 22:15 UTC. Values range from about 14.5 µg/m³ at the low end to 166 µg/m³ at the high end, with a median near 94 µg/m³. PM1, humidity, temperature and UM003 each have nine stations reporting as of 2026‑02‑10 22:00 UTC. PM1 spans roughly 40 µg/m³ to 100 µg/m³ (median ≈ 53 µg/m³); relative humidity varies between 34 % and 50 % (median ≈ 46 %); temperature moves from 17.4 °C up to 25.5 °C (median ≈ 19 °C); and particle concentration (UM003) covers 3 030 to 10 770 particles per cm³ (median ≈ 4 230). These figures show a broad spread around each median, indicating noticeable variability across the city.

In contrast, ozone and PM10 have very limited coverage. Ozone is recorded at only two stations, the latest reading dated 2025‑03‑04 12:15 UTC and showing a placeholder value of –0.999 ppm, while PM10 appears in a single row with no timestamp and a single value of 75.8 µg/m³. The sparse and outdated nature of these two pollutants means that current conditions for ozone and coarse particulate matter cannot be reliably described from this dataset. Overall, Kathmandu’s air‑quality data is recent for most fine‑particle and meteorological parameters, but gaps remain for ozone and PM10, and the city’s conditions can differ noticeably between locations and times.

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

This dataset includes 36 valid measurements and is updated within 30 days. The latest data were recorded on 2026-02-10T22:15:00+00:00. Air quality can vary by location and time within Kathmandu Metropolitan City, so this snapshot may not represent conditions across the city.

OpenAQ station rows