About Us
Manager Office
Area Engineer Office
OIC Office
Bill Payment Points
About Us

In line with one of the primary national objectives in the expansion of sustainable drinking water facilities for the nation, a decision was taken to establish the Western Province Regional Support Centre in 1992. Consequently it was decided to decentralize the operation of the Western Province into three functional areas. As a result, the Regional Support Centre (Western-South) was established in 2008. The primary objective of RSC (WS) is to provide safe drinking water and improved sanitation facilities to the community. Further, provision of safe drinking water to each household leads to improve the health and hygiene of the community.
The geographical areas covered under RSC ( WS ) are Dehiwala, Moratuwa & Ratmalana DS divisions and some parts of Homagama DS Division in the Colombo District, all DS divisions in the Kalutara district and a part of Bentota DS division in the Galle district. This region lies in the wet zone where the annual rainfall varies from 2500 – 3000mm and the annual average temperature varies between 22ºC to 35ºC throughout the year. Area covered by this region is 2250 square km with a population of 1.7 Million as per the 2012 Census Data. This Region has undergone many changes with human influence for a long period resulting in the conversion of natural habitats to man-made form of land use.
Western South Regional Support Centre is headed by a Deputy General Manager assisted by an Assistant General Manager. The Operation and Maintenance (O&M) activities within the RSC (WS) are divided into three regions namely Dehiwala, Panadura/Horana and Kalutara, where each region is headed by a Regional O&M Manager. Total staff within the Western South region is about 669 as at March 2022. Their dedication to work has helped Regional Support Centre (Western-South) to achieve National Productivity Awards (Service Sector – Medium Scale) for years 2014, 2015, 2018 and 2019.
The RSC (WS) provides safe pipe-borne drinking water to people via 299,237 service connections as at March 2022. In addition to this, 137 existing and 35 recently established Community Based Rural Water Supply Schemes (CBOs) of the region contribute 4.5 % of safe pipe-born water supply. Rural Water Supply Sections of Kalutara Manager Office provides close monitoring, capacity development and technical guidance as well as functioning facilities for those CBOs.
There are many medium and large scale water supply projects and transmission improvements which are ongoing at present. Further, many feasibility studies are in place and in progress for improvement to meet the future demand for pipe born water.
A well-functioning clustered laboratory system ( Dehiwala-Panadura and Kaluthra Laboratories ) is in the region enabling Chemical and Bacteriological testing in accordance with updated SLS standards. Dehiwala-Panadura Laboratory obtained ISO/IEC 17025 Laboratory Accreditation certification in 2019, this is the first Laboratory in the NWSDB which was accredited for Biological testing and recognized as one of the competency laboratories in Sri Lanka for potable water testing.
This contributes to reduction of incidents of water borne diseases, benefiting the population by upgrading their livelihood resulting in time and money saved, as well as the benefits to the environment due to reduced water pollution.
Assuring the use of the latest technologies to support the operation benefitting the customers thereby, modern Information and Communication Technology is applied as most effective tools in improving the operational efficiency, quality of service and productivity of the organization. Various steps to enhance the IT Infrastructure and Solutions to suit the needs of the organization have been taken, keeping pace with the latest trends in the industry. Some of these activities include On-line Bill Payment facility, Smart Zone for 24 hour service facilities, On-line Customer Grievance Handling Applications, use of Mobile App for Meter Reading, Drive-thru Bill Payment facility etc.
Contact Us
Regional Support Centre (Western – South)
National Water Supply & Drainage Board,
No.07, Angulana Station Road,
Moratuwa,
Sri Lanka.
Tele : 011 2224888
Fax : 011 2637945 , 011 2637946
Mr. C.C.H.S. Fernando
Additional General Manager
TEL : 011 2224800
Mr. M.T.M. Razil
Deputy General Manager
TEL : 011 2224800
Mr. N.P. Goonewardena
Assistant General Manager
+94 37 2221161, +94 37 2223158,
Manager Office
Manager (Deshiwala)
Eng. Z.T.M. Fazli
No. 151, Anagarika Dharmapala Mawatha (Allen Avenue), Dehiwala.
TEl : 011 2734444
FAX : 011 2713108
Manager (Panadura / Horana)
Eng. C.S. Welikanna
No.44, Weeraman Road, Panadura.
TEl : 038 2241856 / 7
FAX : 038 2241544
Manager (Kalutara)
Eng P.M.Gunasinghe
No 15, Cooray Road, Kalutara.
TEl : 034 2222279/ 034 2223079
FAX : 0342221614
Area Engineer Office
Area Engineer – Dehiwala
No. 151, Anagarika Dharmapala Mawatha (Allen Avenue), Dehiwala
TEL : 011 2734444
FAX : 011 2713108
Area Engineer – Moratuwa
No.7, Angulana Station Road, Moratuwa
TEL : 011 2637950
FAX : 011 2637950
Area Engineer – Panadura
No.44, Weeraman Road, Panadura
TEL : 038 2241856 / 7
FAX : 038 2241544
Area Engineer – Bandaragama-Horana
Janadipathi Mawatha, Bandaragama
TEL : 038 2289147
FAX : 038 2289934
Area Engineer – Kalutara Area
No. 15, Cooray Road, Kaluthara.
TEL : 034 2222278
Area Engineer – Aluthgama/Beruwala
No. 585 , Purwarama Road, Aluthgama.
TEL :034 2271329
OIC Office
OIC Office Dehiwala
No. 151, Anagarika Dharmapala Mawatha (Allen Avenue), Dehiwala
TEL : 011 2734444
FAX : 011 2713108
OIC Office Moratuwa
Rawathawatta Road, Moratuwa
011 2655461
OIC Office Kalutara
No.15, Cooray Road ,Kaluthara.
034 2235177
OIC Office Wadduwa
Public Ground Road ,Wadduwa.
038 2234163
OIC Office Wadduwa
Public Ground Road ,Wadduwa.
038 2234163
OIC Office Pilaminawatte
8th lane, Pilaminawatta, Dodangoda.
034 2285383
OIC Office Mathugama
8th lane, Pilaminawatta, Dodangoda.
034 2285383
OIC Office Beruwala
Siriniwasa Road, Beruwala.
034 2276179
OIC Office Aluthgama
No 585, Purwarama Road, Aluthgama
034 2271953
OIC Office Payagala
No 55/1, Galle Road, Kuda Payagala, Payagala.
034 2224040
Bill Payment Points