Port Klang first to record unhealthy air

Port Klang is the first place in the country to record “unhealthy” air quality – from 82 (moderate) to 125. Other areas on the list were Kuala Selangor (78), Seri Manjung in Perak (77) and Muar (77).

The main cause for its deteriorating air quality was ground level ozone, a condition where abnormally high concentrations of chemical processes brought about by human activities cause smog, according to the Air Pollutant Index (API) on the Department of Environment’s website.

Hazy days: The difference in air quality yesterday compared with Wednesday (top) in Klang.