The Department of Environment (DOE) uses Water Quality Index (WQI) and National Water Quality Standards for Malaysia (NWQS) to evaluate the status of the river water quality . … The river water quality was assessed based on a total of 5,083 samples taken from a total of 473 rivers.
How is water pollution measured?
Pollutants which are either dissolved or suspended in water are often measured or expressed in terms of “concentration,” typically milligrams per liter (mg/l) or micrograms per liter (µg/l).
In which unit water pollution is measured?
Measurement of Water Quality
Many water pollutants are measured in terms of milligrams of the substance per liter of water (mg/L). In older publications pollutant concentrations are expressed as parts per million (ppm), a weight/weight parameter.
Does Malaysia have water pollution?
Rapid urbanisation and population growth have contributed both to an ever-increasing demand for water consumption and, at the same time, to the level of water pollution in Malaysia. The quality of water in Malaysia, as well as access to water in general, is a major concern.
Which is the main source of water pollution?
The main point source of pollution to water is from sewage and waste water treatment, while for diffuse pollution, main sources are from farming and fossil fuel power plants (via the air).
What are the causes of water pollution in Malaysia?
With regards to the water pollution, generally in Malaysia it is caused by point and non-point sources. Point sources comprise sewage treatment plants, manufacturing and agro-based industries as well as animal farms. Non-point sources are made up of diffused sources such as agricultural activities and surface runoffs.