Cambodia Cambodia amends Sub-Decree on Water Pollution Control

The government of Cambodia established the “Sub-Decree No. 103 ANKr/BK regarding amendment of article 4, 9, 11, 12, 17, Annex 2, Annex 3, Annex 4 and, Annex 5 of the Sub-Decree No. 27 ANKr/BK dated April 6, 1999 on Water Pollution Control” on June 29, 2021. As its title mentions, the Sub-Decree No. 103 ANKr/BK amends the Sub-Decree No. 27 ANKr/BK established in 1999.

 

Effluent standard

The Sub-Decree specifies a new general effluent standard. A different standard is set for discharge to;

  • Category 1 Water Body (closed water environment)
  • Category 2 Water Body (non-stagnant open water body)
  • Piping network connected to the central wastewater treatment plant.

 

No. Parameter Unit Standard
Category 1 Water Body

(Closed water)

Category 2 Water Body

(Open water)

Central Wastewater Treatment Plant
1 Temperature <40 <40 <45
2 Color mg Pt/l <50 <150 <300
3 TSS mg/l <50 <100 <200
4 pH 6-9 5.5-9 5-9
5 BOD5 mg/l <30 <60 <200
6 COD (Cr2O7-2) mg/l <60 <120 <300
7 Oil & grease mg/l <5 <10 <30
8 Detergent mg/l <5 <10 <30
9 NH3 as N mg/l <7 <10 <30
10 No3-1 as N mg/l <10 <20
11 Cl2 mg/l <1 <2
12 Cl mg/l <500 <1000
13 PO4-3 mg/l <2 <5
14 Total – N mg/l <20 <40
15 Total – P mg/l <4 <6
16 H2S mg/l <0.2 <0.5 <1
17 Mn mg/l <1 <3 <5
18 Boron (B) mg/l <1 <2.5 <5
19 Barium (Ba) mg/l <2 <5 <7
20 CN-1 mg/l <0.1 <0.2 <1
21 Total CN mg/l <1 <1.5 <2
22 Arsenic (As) mg/l <0.05 <0.1 <0.5
23 Iron (Fe) mg/l <1 <5 <20
24 Lead (Pb) mg/l <0.1 <0.3 <0.5
25 Zinc (Zn) mg/l <2 <5 <10
26 Copper (Cu) mg/l <1 <2 <5
27 Chromium (Cr+6) mg/l <0.05 <0.1 <0.5
28 Cadmium (Cd) mg/l <0.05 <0.1 <0.5
29 Nickel (Ni) mg/l <0.2 <0.5 <2
30 Selenium (Se) mg/l <0.02 <0.5 <2
31 Mercury (Hg) mg/l <0.005 <0.01 <0.05
32 Phenol (C6H6O) mg/l <0.5 <1 <5

 

Wastewater discharge license

Water pollution sources are classified into 3 types with conditions as follows;

Type 1: A wastewater discharge license shall be obtained from the Ministry of Environment if the premise generates wastewater (excluding cooling water) more than 40 cubic meters per day. Production of cloth, rubber products (except tire), ceramics, cement, furniture and etc.
Type 2: A wastewater discharge license shall be obtained from the Ministry of Environment if the premise generates wastewater (excluding cooling water) more than 20 cubic meters per day. Hospitals, livestock farms, distilleries, production of food products, textile products, pulp and paper and etc.
Type: 3 A wastewater discharge license shall be obtained from the Ministry of Environment regardless of the amount of wastewater. Mining, production of chemical products, metal products, machinery, automobiles and parts, waste management, power plants and etc.

 

 

Download original text of the Sub-Decree No. 103 ANKr/BK at
https://www.moe.gov.kh/wp-content/uploads/2021/06/%E1%9E%A2%E1%9E%93%E1%9E%BB%E1%9E%80%E1%9F%92%E1%9E%9A%E1%9E%B9%E1%9E%8F%E1%9F%92%E1%9E%99%E1%9E%9B%E1%9F%81%E1%9E%81%E1%9F%A1%E1%9F%A0%E1%9F%A3_%E1%9E%A2%E1%9E%93%E1%9E%80%E1%9F%92%E1%9E%9A_%E1%9E%94%E1%9E%80_%E1%9E%85%E1%9E%BB%E1%9F%87%E1%9E%90%E1%9F%92%E1%9E%84%E1%9F%83%E1%9E%91%E1%9E%B8%E1%9F%A2%E1%9F%A9_%E1%9E%81%E1%9F%82%E1%9E%98%E1%9E%B7%E1%9E%90%E1%9E%BB%E1%9E%93%E1%9E%B6_%E1%9E%86%E1%9F%92%E1%9E%93%E1%9E%B6%E1%9F%86%E1%9F%A2%E1%9F%A0%E1%9F%A2%E1%9F%A1-1.pdf