Air quality in Yuen Long District, Hong Kong, China today
Mr. Duck’s Air Quality Score
Moderate air today for Yuen Long District, Hong Kong, China
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Yuen Long District is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Recent measurements show a PM2.5 concentration of 15.7 µg/m³ and a PM10 level of 23.5 µg/m³, based on five valid observations collected via OpenAQ.
These values reflect the present monitoring results for the district. 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 Yuen Long District air‑quality record is drawn from a single monitoring site that reports six pollutant measurements. For each of the listed gases and particles – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM₁₀), particulate matter ≤2.5 µm (PM₂.₅) and sulfur dioxide (SO₂) – there is one recent data point, all timestamped 2026‑02‑10 22:00 UTC. The OpenAQ feed flags these entries as “updated within 3 days,” indicating that the latest observations are fresh for this location.
Because only a single row per pollutant is available, the dataset shows no statistical spread: the minimum, median and maximum values are identical for each substance. CO registers at 947.4 µg/m³, NO₂ at 48.4 µg/m³, O₃ at 14.3 µg/m³, PM₁₀ at 23.5 µg/m³, PM₂.₅ at 15.7 µg/m³ and SO₂ at 1.3 µg/m³. This uniformity means the current snapshot cannot reveal short‑term fluctuations or longer‑term trends within Yuen Long; any variation in air quality across different neighborhoods or times of day would not be captured by this single‑site, single‑time record.
In practical terms, the data set provides a concise picture of six key pollutants at one point in time, with all values freshly reported. However, the lack of multiple stations or repeated measurements limits insight into spatial diversity and temporal dynamics across the district. Users should keep in mind that conditions can differ elsewhere in Yuen Long and may change after the recorded timestamp.
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 Yuen Long District is based on five valid measurements and was refreshed within three days, with the latest update recorded at 2026‑02‑10T22:00:00+00:00. This snapshot reflects conditions at a specific time; air quality can differ across locations and moments within the district, so values may not represent current or area‑wide conditions.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Yuen Long | no2 | 48.4 | µg/m³ | 2026-02-10 22:00 UTC |
| Yuen Long | o3 | 14.3 | µg/m³ | 2026-02-10 22:00 UTC |
| Yuen Long | pm10 | 23.5 | µg/m³ | 2026-02-10 22:00 UTC |
| Yuen Long | pm25 | 15.7 | µg/m³ | 2026-02-10 22:00 UTC |
| Yuen Long | so2 | 1.3 | µg/m³ | 2026-02-10 22:00 UTC |