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Malaysia Marine Water Quality Criteria and Standard

Parameter

CLASS 1

CLASS 2

CLASS 3

CLASS E

BENEFICAL USES Preservation, Marine Protected areas, Marine Parks Marine Life, Fisheries, Coral Reefs, Recreational and Mariculture Ports, Oil & Gas Fields Mangroves Estuarine & River-mouth Water
Temperature (°C) ≤ 2°C increase over maximum ambient ≤ 2°C increase over maximum ambient ≤ 2°C increase over maximum ambient ≤ 2°C increase over maximum ambient
Dissolved oxygen (mg/L) >80% saturation 5 3 4
Total suspended solid (mg/L) 25 mg/L or ≤ 10% increase in seasonal average, whichever is lower 50mg/L (25 mg/L) or ≤ 10% increase in seasonal average, whichever is lower 100 mg/L or ≤ 10% increase in seasonal average, whichever is lower 100 mg/L or ≤ 30 % increase in seasonal average, whichever is lower
Oil and grease (mg/L) 0.01 0.14 5 0.14
Mercury* (µg/L) 0.04 0.16 (0.04) 50 0.5
Cadmium (µg/L) 0.5 2 (3) 10 2
Chromium (VI) (µg/L) 5 10 48 10
Copper (µg/L) 1.3 2.9 10 2.9
Arsenic (III)* (µg/L) 3 20(3) 50 20 (3)
Lead (µg/L) 4.4 8.5 50 8.5
Zinc (µg/L) 15 50 100 50
Cyanide (µg/L) 2 7 20 7
Ammonia (unionized) (µg/L) 35 70 320 70
Nitrite (NO2) (µg/L) 10 55 1,000 55
Nitrate (NO3) (µg/L) 10 60 1,000 60
Phosphate (µg/L) 5 75 670 75
Phenol (µg/L) 1 10 100 10
Tributyltin (TBT) (µg/L) 0.001 0.01 0.05 0.01
Faecal coliform (Human health protection for seafood consumption) – most Probable Number (MPN) 70 faecal coliform 100mL-1 100 faecal coliform 100mL-1 & (70 faecal coliform 100mL-1 ) 200 faecal coliform 100mL-1 100 faecal coliform 100mL-1 & (70 faecal coliform 100mL-1 )
Polycyclic Aromatic Hydrocarbon (PAHs) ng/g 100 200 1000 1000

*IMWQS in parentheses are for coastal and marine water areas where seafood for human consumption is applicable.

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Last Updated:

October 16, 2017 @ 2:29 pm

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