Air quality in Vientiane Capital, Vientiane Prefecture, Laos today

Mr. Duck’s Air Quality Score

Unhealthy air today for Vientiane Capital, Vientiane Prefecture, Laos

⚠️ 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 Vientiane Capital is classified as Unhealthy. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 110.88 µg/m³ based on twenty valid readings collected via OpenAQ.

This assessment reflects the current conditions without speculation about causes or future trends. 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 Vientiane Capital pulls in six measured pollutants – PM2.5, PM1, PM10, relative humidity, temperature and the particle count UM003 – from a total of 57 recent rows collected across 11 monitoring stations. For five of the pollutants (PM2.5, PM1, relative humidity, temperature and UM003) the most recent reading was logged on 2026‑02‑10 at 20:00 UTC, which falls within the “updated within 7 days” freshness category. The lone PM10 record lacks a timestamp, so its freshness is unknown.

Across the available data the concentration of fine particulate matter shows a wide spread: PM2.5 values range from about 9.8 µg/m³ up to 136.7 µg/m³, with a median near 62 µg/m³; PM1 varies between roughly 5.5 µg/m³ and 94.8 µg/m³, median 33.9 µg/m³. Relative humidity measurements sit between 36 % and 55 %, centering on a median of 51 %; temperature readings cover 23.7 °C to 34.2 °C, with a typical value around 26.3 °C. The UM003 particle count is especially variable, from about 595 particles/cm³ to a high of 17 540 particles/cm³, median roughly 2 527 particles/cm³.

Because the PM10 entry has no station name and no timestamp, its coverage is effectively missing for this city’s current snapshot. Overall, most pollutants are represented by recent data from multiple stations, but the uneven timestamp availability and a single‑station record for PM10 mean that conditions can differ across neighborhoods and times, and the dataset does not capture every location continuously.

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 20 valid measurements and is Updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 20:00 UTC. This snapshot provides a brief view of current conditions; however, air quality can vary across different neighborhoods and times of day throughout Vientiane Capital.

OpenAQ station rows