Updates Domestic Wastewater Management inCambodia

By: Mr. Him Chandath
The 16th WEPA Annual Meeting
1-2 March 2020
1Content• Facts and statistics of water quality• Facts and statistics of domestic wastewater management• Legislative framework for water environmental governance• Institutional framework for water environmental governance• Enforcement instruments for water environment management• Future plans and challenges of water environment governance2Facts and statistics of water quality-

Mekong River, Tonle Sap River andBassac River ៖ 10 sites-Tonle Sap Lake៖ 2 sites-

5 Stream around Tonle Sap Lake ៖ 9 sites-Seawater៖ 7 sites-Total៖ 203 samples (Annually)-

Water Quality Auto monitoring Station3

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Facts and statistics of water quality•Con (mg/l)

•1.20

•

1.00

•

0.80

Commonly, the values of BOD,
COD are ranged in thestandard, except few locationsof which the values of TN andTP were identified to slightly
increase.
Sap River TN=0.77 mg/l TP =0.13 mg/l
Tonle Sap Great Lake TN=1.41mg/l
TP = 0.36 mg/l,
Bassac River TN=1.07 mg/l TP =0.34 mg/l

0.60
0.40
0.200.00ទេន� េមគង�ទេន� �បទេន� ��ក់5TN (mg/l)

TP (mg/l)ស� ង់�ស� ង់�Facts and statistics of water quality
987
6543
2
10

pH (6.5-8.5)

DO (2-7.5 mg/L)

CODMn (<8 mg/L)

6

Water Quality Monitoring Station

7

Facts and statistics of domestic wastewatermanagement••

Domestic wastewater is 640 000 m3/d (80%of water supply) were treated by: Central Wastewater Treatment Plants
34000 m3/d,
 Onsite treatment plant at Commercial
Building, Sub city and Septic tank at individual house.
Central Wastewater Treatment Plants : Kep city: 175 m3/d,
 Battambang city:1000 m3/d,
 Siem Reap city:8 000 m3/d,
 Preah Sihanouk city :25 000 m3/d

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Legislative framework for water
environmental governance Laws on Environmental Protection and Natural Resources

Management (1996)

 Laws on Water Resources Management(2007)
 Sub-decree on Water Pollution Control (April, 1999)
 Sub-decree on Environmental Impact Assessment (August 11, 1999)
 Sub-decree on the Management of Sewage and Wastewater

Treatment System(25 Dec. 2017)9Legislative framework for water
environmental governance• Draft Law on Sewerage System In Cambodia

Objective: To manage, develop and use of sewage

filtration station and sewage discharge system toensure their quality, safety, effectiveness andsustainability in the Kingdom of Cambodia.

• Final draft revision of Sub-decree on Water Pollution Control (April, 1999):• 8 articles• 4 Annex:• Effluent standard• Classification of pollution sources• Environmental quality standard (surface water quality
standard and human health protection standard)

10Institutional framework for water
environmental governance Ministry of Water Resources and Meteorology(MWRAM) and , basedon the Law on Water Resources Management, are paying more
attention on monitoring watercourses (in terms of quantity andquality) in Cambodia.
 Ministry of Land Use Planning Urbanization and Construction is

responsible for Construction Plan and Building Approval Ministry of Environment, in complying the Environmental Law and Sub-decree are paying more attention on monitoring environmental
quality (in terms of water, soil and air) in Cambodia.

11Enforcement instruments for water
environment management• Department of Inspection and Law compliant under the directsupervision is a core function to facilitate among technicaldepartment under General Directorate of Environmental Protection
and provincial department of environment lead in monitoring,inspection all kind of environmental pollution sources in Cambodia.
• Working group monitoring the environmental pollution on Special

Economic Zone( Co chair by under secretary from CDC, MoE) is
responsible for:

Facilitate all required document follow the existing legislation
Strengthening the effectiveness of the implementation ofenvironmental plan and contract
Consult and provide technical advisory on solid, liquid waste andair management
Control and sold the confect related to environmental protection
12Future plans and issues, challenges ofwater environment governance•

Environmental violation still happen, especially discharging wastewaterfrom factories without treatment or treating not comply to effluent
standard•

National standard for septic tank is not yet available•

Technical training for septic tank installing and maintain is not in place•

Price of sewage treatment facility is still high•Lack of budget, technical equipment, and human resources (both quantityand quality)•

Onsite treatment management mechanism requires a strong cooperation
among relevant ministries•

Cooperation with country in the region, Water Quality Monitoring Station
will be installed in some provinces.

•Cooperation with development partners, central sewage treatment plants
at some cities (Phnom Peng, Battambang city, Serei soporn city, Poy Petcity, Stoeng Sen city, Bavet city ) are on the process.
13Thank you for you kind attention

Thank you for youkind attention
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