Background
The WaSSIP (Water Supply and Sanitation Improvement Project) in Siem Reap is implemented by the Ministry of Public Works and Transport under a World Bank concessional loan. As of 30 June 2026 the project reported overall construction progress of 90.34%.
The project combines trunk and secondary sewer network construction, rehabilitation of pumping and wastewater treatment facilities, and household sewer connections to expand urban sanitation coverage in Siem Reap. Implementation is structured as multiple MPWT subprojects (MPWT-CW-1A, CW-3, CW-4, CW-6A and CW-9) that separately deliver network works, pumping-station rehabilitation, treatment-station upgrades and household connections.
Key developments
On 10 July 2026 a delegation led by Guangzhe Chen (World Bank Vice President for the Planet) and Julia Fraser (World Bank Asia-Pacific Director) conducted a field inspection in Siem Reap accompanied by H.E. Ros Vanna, Secretary of State at MPWT, provincial officials, project managers and construction contractors. The visit assessed the status of civil works and engaged technical teams from MPWT and the World Bank.
Project reporting details completed works by subproject: a trunk and secondary sewer network of about 55.25 km has been constructed, equal to 92.08% of a 60 km target under MPWT-CW-1A. Other reported outputs include household connection works totaling 28.236 km under associated subprojects; rehabilitation of three pumping stations under MPWT-CW-3; upgrades to wastewater treatment operations under MPWT-CW-4; construction of about 17.577 km of secondary network plus two new pumping stations under MPWT-CW-6A; and approximately 6.50 km of network and 467 household connections under MPWT-CW-9.
Operational implications
By 30 June 2026 the project had connected 22,707 residents to sanitation services, representing 98.73% of the 23,000-person target; women accounted for 11,130 of the beneficiaries. The reporting indicates that 195 beneficiaries are identified as ID-poor (ID-poor 1 and ID-poor 2) and 268 beneficiaries are persons with disabilities and female heads of household who received sanitation services via free connections to the sewer system.
Completion of trunk networks, rehabilitation of pumping and treatment facilities, and household connections together determine the ability of the urban sewer system to operate at design capacity and to expand service coverage; those component-level outputs should inform future maintenance planning and municipal sanitation management by MPWT and provincial authorities.
Source
Ministry of Public Works and Transport (MPWT) Facebook post, 13 July 2026 (source URL provided).
