Air quality in Hong Kong Island, Hong Kong, China today

Mr. Duck’s Air Quality Score

Moderate air today for Hong Kong Island, 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 on Hong Kong Island is currently classified as Moderate. The primary pollutant identified is PM2.5, with a measured concentration of 13.7 µg/m³. In addition, PM10 levels are recorded at 19.5 µg/m³ based on fifteen valid observations from OpenAQ data.

These values reflect the latest available measurements for today and provide an overview of particulate matter conditions across the island. 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 Hong Kong Island includes six measured pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM₁₀), particulate matter ≤2.5 µm (PM₂.₅) and sulphur dioxide (SO₂). Data come from 17 individual rows collected at three monitoring stations, giving a modest spatial coverage across the island. All observations were recorded on 2026‑02‑10 at 22:00 UTC, which meets the “updated within 3 days” freshness criterion for every pollutant.

For each gas the range of values captured in the latest batch is narrow enough to show typical conditions while still reflecting variability. NO₂ spans from 19.0 µg/m³ up to 61.8 µg/m³, with a median of 24.8 µg/m³; O₃ varies between 18.1 and 76.8 µg/m³, centred around a median of 66.9 µg/m³. Particulate matter is low‑level: PM₁₀ ranges from 14.1 to 19.5 µg/m³ (median 16.8) and PM₂.₅ from 7.9 to 13.7 µg/m³ (median 11.0). SO₂ shows the smallest concentrations, between 1.7 and 3.4 µg/m³ (median 2.6). CO is the only pollutant with a different station focus – the highest reading of 442.3 µg/m³ comes from Causeway Bay, while the overall CO values lie between 381.6 and 442.3 µg/m³ (median 411.95).

The data set is recent but limited in breadth: only three stations contribute, so conditions can differ across other parts of Hong Kong Island that are not directly represented. Nonetheless, the consistent timestamp across all pollutants provides a snapshot of air quality at a specific moment, with each pollutant showing a clear minimum‑maximum spread and a central tendency that can be used for short‑term comparison.

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 Hong Kong Island includes 15 valid measurements and is refreshed regularly, having been Updated within 3 days; the latest values were recorded at 2026‑02‑10T22:00:00+00:00. These figures represent a snapshot of conditions across the island and may not reflect variations that occur at different locations or times within the city.

OpenAQ station rows