Air quality in Shah Alam, Selangor, Malaysia today

Mr. Duck’s Air Quality Score

Moderate air today for Shah Alam, Selangor, Malaysia

⚠️ 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 Shah Alam today is classified as Moderate. The primary pollutant identified is PM2.5, with a measured concentration of 28.37 µg/m³ based on five valid observations reported through OpenAQ.

Data for this assessment come from the same set of measurements and reflect the current conditions without additional interpretation. 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

Shah Alam’s OpenAQ feed contains data from two monitoring sites and a total of eleven recorded rows. The dataset provides six measured variables: PM1, PM2.5, PM10, relative humidity, temperature and the particle count UM003. For five of these pollutants – PM1, PM2.5, relative humidity, temperature and UM003 – the most recent observations were uploaded on 2026‑02‑10 at 16:00 UTC, so the information is less than a week old. The PM10 reading, however, dates back to 2025‑01‑13 at 23:00 UTC and is therefore considerably older than the rest of the series.

Across the recent data the observed concentrations show a modest spread. PM1 values range from about 14.4 µg/m³ up to 20.8 µg/m³, with a median near 17.6 µg/m³; PM2.5 spans roughly 13.9 µg/m³ to 28.4 µg/m³ and the middle value sits at 21.1 µg/m³. Relative humidity varies between 52 % and 74 %, centering around 63 %; temperature is recorded from 26 °C to just over 29 °C, with a median of 27.6 °C. The particle‑count metric UM003 ranges from about 1 186 particles/cm³ to 2 683 particles/cm³, the typical value being close to 1 935 particles/cm³.

The coverage is uneven: while PM1, PM2.5, humidity, temperature and UM003 have fresh, multi‑row records, PM10 is represented by a single older entry from a different site (Setia Alam). Consequently, city‑wide conditions may differ between locations and times, especially for the coarser particulate measure where recent data are lacking.

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 five valid measurements and is updated within 3 days, with the latest reading recorded at 2026‑02‑10T16:00:00+00:00. This snapshot provides a brief view of air quality in Shah Alam, Selangor; conditions can differ across neighbourhoods and change throughout the day, so values may not represent every location or moment within the city.

OpenAQ station rows