National Water Quality Standards For Malaysia Inwqs

National water quality standards for malaysia parameter unit class i iia iib iii iv v al mg l 0 06 0 5 as mg l 0 05 0 4 0 05 0 1 ba mg l 1 cd mg l 0 01 0 01 0 001 0 01 cr iv mg l 0 05 1 4 0 05 0 1 cr iii mg l 2 5 cu.

National water quality standards for malaysia inwqs. The goal is not to meet the standards of the certain water class in all surface waters but to improve water quality gradually in order to meet the standards of the better water class than the actual. Class 1 is considered a very clean water. The water need no treatment as it only need to boil as a drinking water. This river was classified into class i class iii based on malaysian interim water quality standard criteria inwqs.

Ammoniacal nitrogen nh3 n 92 100. Biochemical oxygen demand bod 91 100. On the interim national water quality standards inwqs a set of standards derived based on beneficial uses of water. Aquatic life criteria for toxic chemicals are the highest concentration of specific pollutants or parameters in water that are not expected to pose a significant risk to the majority of species in a given environment or a narrative description of the desired conditions of a water body being free.

Result of water quality analysis physico chemical indicated that sungai kelantan is characterised by excellent water quality and comparable to pristine ecosystems such as the national park and kenyir lake. Suspended solids ss 76 100. Results from the study show that most. The interim water quality standards for class 1 are as follows.

Water quality standards for surface water the national water quality standards which is applied to surface waters ordains standard values of 72 parameters in 6 water use classes. 2 3 2 setting national standards 32 2 4 identifying priority drinking water quality concerns 34 2 4 1 assessing microbial priorities 35 2 4 2 assessing chemical priorities 35 3. Hydrological and physicochemical parameters and the water quality status was classified under the interim national water quality standards inwqs which tabulated six levels of pollution ranging from moderate to extremely polluted in the order of i iia iib iii iv and v. The national water quality monitoring programme added new rivers in the area to control the presence of biochemical oxygen demand ammoniacal nitrogen and suspended solids.

The supply of drinking water or any sensitive aquatic species must follow this standard to ensure it safe to use. Health based targets 37 3 1 role and purpose of health based targets 37 3 2 types of health based targets 39 3 2 1 specified technology targets 41 3 2 2 performance. Ammonical nitrogen mg l 0 1 bod mg l 1 cod mg. The department of environments is responsible for tracking the water quality in malaysia using water quality index and national water quality standards.