Air quality in Kowloon, Hong Kong, China today

Mr. Duck’s Air Quality Score

Moderate air today for Kowloon, Hong Kong, China

⚠️ 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 Kowloon is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 11.5 µg/m³ and a PM10 level of 17.6 µg/m³, based on fifteen valid observations collected through OpenAQ.

These figures 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

Kowloon’s air‑quality feed draws from three monitoring sites that together contribute sixteen recent observations. The dataset includes carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM₁₀), particulate matter ≤2.5 µm (PM₂.₅) and sulfur dioxide (SO₂). All pollutants have a most‑recent reading timestamped 2026-02-10 22:00 UTC, which satisfies the “updated within three days” criterion for every measured species.

The concentration values show a fairly tight spread for most gases. NO₂ ranges from a low of 28.9 µg/m³ to a high of 60.2 µg/m³, with a median of 58.1 µg/m³ and the 90th percentile at 59.78 µg/m³, indicating that recent measurements cluster near the upper end of the observed range. O₃ varies between 26.7 µg/m³ and 60.7 µg/m³, median 42.2 µg/m³, with the 10th percentile at 29.8 µg/m³ and the 90th at 57.0 µg/m³, showing a broader distribution than NO₂. Particulate matter is comparatively low: PM₁₀ spans 14.8–17.6 µg/m³ (median 15.5 µg/m³) and PM₂.₅ runs from 8.9 to 11.5 µg/m³ (median 10.1 µg/m³), both with narrow inter‑percentile ranges. SO₂ is modest, recorded between 2.6 and 5.5 µg/m³ (median 2.9 µg/m³). CO appears as a single value of 537.7 µg/m³ across all rows, reflecting that only one observation was captured for this pollutant.

Overall the data set is recent and complete for most pollutants, but coverage is uneven: while NO₂, O₃, PM₁₀, PM₂.₅ and SO₂ each have three stations contributing multiple rows, CO is represented by a single row from one site. Consequently, city‑wide conditions may differ across neighborhoods and times of day, especially for CO where the limited sampling provides less spatial detail than the other constituents.

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 set for Kowloon includes 15 valid measurements and is Updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. This snapshot reflects conditions at a specific time and place; air quality can vary across different neighborhoods and moments throughout the city.

OpenAQ station rows