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Table 4 Malaysian marine water quality standard (MMWQS)

From: Application of fuzzy evaluation technique and grey clustering method for water quality assessment of the coastal and estuaries of selected rivers in Sarawak

Parameter (μg/l) unless otherwise stated Class 1 Class 2 Class 3 Interim class E1 Interim class E2 Interim class E3
     Estuaries   
Dissolved oxygen  > 6.0  > 5.0  > 3.0  > 5.0   
Faecal coliform (Cfu/100 ml) 70      
Ammonia 35.0 50.0 320.0 5.0 10.0 10.0
Nitrate 10.0 60.0 700.0 200.0 570.0 430.0
Phosphate 5.0 75.0 670.0 100.0 180  
Total suspended solids 25.0 50.0 100.0 30.0