Air quality in Ulaanbaatar, Mongolia today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Ulaanbaatar, Mongolia

⚠️ 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 Ulaanbaatar is classified as USG. The primary pollutant identified for the current assessment is PM2.5 (fine particles).

Measurements show a PM2.5 concentration of 35.49 µg/m³, based on two valid observations recorded by OpenAQ. No PM10 value is available for this period. 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 Ulaanbaatar contains measurements of six common air‑quality gases and particles – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5) and sulphur dioxide (SO₂). In total 76 rows of observations are recorded across 21 monitoring stations, giving a modest spatial coverage that varies by pollutant because not every station reports all six substances.

The most recent data point in the whole collection is from 2026‑02‑10 18:03 UTC for PM2.5 at the Baruun 4 zam – 1 site; the next newest timestamps are from late 2019 for the other pollutants, ranging between 2019‑12‑31 and 2019‑03‑13 UTC. This means that, apart from PM2.5, all values are older than three years, so the snapshot reflects historical conditions rather than current air quality.

Across the six pollutants the observed ranges are wide. CO spans from a minimum of 0 µg/m³ to a maximum of 821 µg/m³ with a median of 39 µg/m³; NO₂ varies between 3 and 52 µg/m³ (median 32); O₃ is recorded from 2 up to 87 µg/m³ (median 20); SO₂ ranges from 6 to 83 µg/m³ (median 14.5); PM10 shows values from 46 to 242 µg/m³ (median 124) and PM2.5 from 29.6 to 217 µg/m³ (median 101). The 10th‑percentile figures are generally low, but the 90th‑percentile values reach near the maximum for each pollutant, indicating occasional high spikes.

Because many rows are flagged as “old data” and only a handful of recent entries exist, the dataset captures a broad historical spread rather than a detailed current picture. Consequently, air‑quality conditions in Ulaanbaatar can differ substantially across neighborhoods and over time, and the available measurements reflect that variability.

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 reflects two valid measurements and was updated within 3 days, with the most recent reading recorded at 2026‑02‑10T18:03:14+00:00. This snapshot provides a brief view of current conditions, but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in Ulaanbaatar.

OpenAQ station rows