The Development Section of National Water Supply & Drainage Board, headed by the Deputy General Manager (Development) is reported to the Additional General Manager (Policy & Planning). The Research & Development and GIS & Mapping Sections are reported to the Deputy General Manager (Development).

Main functions of the Development Division:

Development Works towards the service level upliftment of the NWSDB, with various activities related to Water and Sanitation Sector are main functions and Key areas are briefed below.

• Water Resource Security and Safety Development;

     i.  Coordination with Irrigation Department, Mahawali Authority, etc. on water extraction/ allocation requirements for
         future projects.
     ii.  Assistance for feasibility studies of river upstream, impounding reservoirs.
     iii. Preparation, updating, sharing and maintaining of the raw water quality data base in all raw water intakes, island wide. 
     iv. Water Safety Plan Activities as a Supporting Unit, for Water Treatment Plants in Western North, Sabaragamuwa and
         Southern, Regional Support Centres.
     v. Preparation of “Repositories” on Drinking Water Supply for Regional Support Centres.

• Contract Administration and Document Preparation for improvements in the head office and nearby offices and quartes.

• Institution Development Activities.

• Liaise with other relevant institutions for sector improvements


Management Staff of Development Division

Name Designation Tel/Fax E-mail
 Eng.A.S.Kaluarachchi Deputy General Manager (Development) 2638102/2623285 dgmdev@waterboard
Eng.M.T.A.Bava Assistant General Manager(Development) 2638102/2623285 இம்மின்-அஞ்சல் முகவரி spambots இடமிருந்து பாதுகாக்கப்படுகிறது. இதைப் பார்ப்பதற்குத் தாங்கள் JavaScript-ஐ இயலுமைப்படுத்த வேண்டும்.
Mr.E.Upali Alwis Assistant General Mnaager - Sociologist 2638102/2623205
இம்மின்-அஞ்சல் முகவரி spambots இடமிருந்து பாதுகாக்கப்படுகிறது. இதைப் பார்ப்பதற்குத் தாங்கள் JavaScript-ஐ இயலுமைப்படுத்த வேண்டும்.
Eng.(Mrs.) T.K.N.K.Kumari Chief Engineer(Development) 2638102/2623285  
Eng.(Mrs.)I.I.Weeraratne Engineer 2638102/2623285  
Eng.H.W.Gunawardena Engineer 2638102/2623285  
  R&D Section    

EOE Perera Mawatha,
Meewathura, Peradeniya.

Name Designation Tel/Fax E-mail
Eng. Eranda Pradeep Rajapaksa. Assistant General Manager(Research & Development) 077-3928471 இம்மின்-அஞ்சல் முகவரி spambots இடமிருந்து பாதுகாக்கப்படுகிறது. இதைப் பார்ப்பதற்குத் தாங்கள் JavaScript-ஐ இயலுமைப்படுத்த வேண்டும்.









Write comment (0 Comments)

Contact Details Click here....

Write comment (0 Comments)
4 2 3 


It was a significant milestone for National Water Supply & Drainage Board to start the Mapping Section in the year 1980 with the objective of preparing and updating of maps especially for the water distribution network which carried them out manually by the technical staff. The GIS & Mapping Section was established in the present form in the year 2000 with the main objective of serving as the main agency in surveying, mapping and in geo-spatial activities having a particular responsibility in the organization.(These implementations were carried out under“Third Water Supply and Sanitation Project – Package C – Mapping Component : NWS&DB – funded by NORAD)

The GIS & Mapping Section plays a leading role in most of the geo-spatial and mapping activities within the NWS&DB. A few major contributions are surveys and mapping of water distribution network, digitization of as-built drawings and analogue drawings using latest techniques, upgrading same to a higher level of accuracy with the introduction of high accuracy Global Positioning System (GPS) and surveying consumer locations. It also contributed to the “Third Water Supply and Sanitation Project – Package C – Mapping Component (NWS&DB). It is significant that their contribution in capacity development activities and supply of technical expertise for geo-spatial activities, publishing the Spatial Data Model for NWS&DB, and also takes initiatives towards building up of Spatial Data Infrastructure( SDI ) and GIS for NWS&DB.

Further, the GIS & Mapping Section is enriched,equipped with the latest technology in the field of geo-spatial information handling and management. At all the times, it does research and development work in exploring geo-spatial science and technology to cope up with the rapid changes in new technology that contributes for the improvement of the organization and country’s development towards the well being of the nation.

The GIS & Mapping Section consists of the Engineering Services and Mapping Services branches.They are responsible for the development of Geographic Information System for NWS&DB. Other main duties include creation of ArcGIS maps for NWS&DB and for other organizations when requested. The GIS & Mapping Section is also responsible in storing and maintaining GIS maps of the water distribution network as well as the Sewer Network of NWS&DB.

The process sets the scene for promoting a culture of integration and collaboration within NWS&DB and its leadership and commitment has the potential to ‘pave the way’ for new approaches to the way geo-spatial activities are conducted in the NWS&DB arena in the future.

Underpinning Principles

• Make geo-spatial data accessible and available to all users within NWS&DB.
• Deliver high quality authoritative geo-spatial data to the users of NWS&DB.
• Simplified access to the geo-spatial data by providing on-line access using organizations common infrastructure.
• Provide basis to improve the efficiency of the organization’s process involving geo-spatial information.
• Combined various spatial data themes for the purpose of analysis and decision making.
• Optimize the investment and develop a partnership across the geo-spatial information community of the organization.


 1 3


 “Sustainable drinking water supply through effective use of geo-spatial data for evidence-based decision making”.

This vision will be realized through four strategic goals.
• An accurate representation of Water Utility Network that is readily accessible and easily integrated with economic, social and environmental geography.
• Greater efficiency and productivity in the management and sharing geo-spatial data.
• Improve the practice of evidence-based decision making in the organization through access to integrated spatial information.
• Geo-spatial solutions readily available and widely used across the organization in response to emerging opportunities.

For a outline of Available Geo - Spatial Data at GIS & Mapping Section and briefing on Development of SDI for NWS&DB download following document

Contact Details 

GIS & Mapping Section
National Water Supply & Drainage Board
Thelawala Road

Tel : +94 11 2636770
Fax : +94 11 2624727
E-mail : இம்மின்-அஞ்சல் முகவரி spambots இடமிருந்து பாதுகாக்கப்படுகிறது. இதைப் பார்ப்பதற்குத் தாங்கள் JavaScript-ஐ இயலுமைப்படுத்த வேண்டும்.


Write comment (0 Comments)

Ground Water Section in the National Water Suppy and drainage Board has been functioning since late 1978. At present the section is operating with the regional RSC set up with direct technical support from the Assistant General Manager (Groundwater) office which is under super vision of DGM(Development) and Addl. GM (Policy & Planning). There are nine regional Grounwater offices for the nine provinces of the country.

 Main activities and services of the Groundwater section are:

  • Hydrogeological and geophysical investigations for ground water sources, bed rock levels, saline intrusions and various purposes of underground activities.
  • Construction of water wells (deep and shallow) using various methods for ground water extraction, well development and supply and installation of Hand pumps and Iron removal plants.
  • Conducting of pumping tests for recommendation of ground water extraction.
  • studies on ground water problems, hydrogeological mapping, groundwater management and environmental impact assessments.
  • Implementation of the national policy 3Tier maintenance system for Hand pumps Tube Wells.
  • Training of NWSDB staff and outside parties/ personals in connection with various aspects of ground water activities 
 Contact Details and Districts Covered :
Groundwater Office Contact Details
Telephone / Fax 
District Covered 
AGM(Groundwater) Office Colombo 0112636584 /  01122622911 All Districts 
Groundwater Investigation Section Colombo 0112636686  All Districts
Ampara  0632224387 Ampara, Batticaloa & Trincomale
Anuradhapura 0252222060 Aanuradhapura & Polonnaruwa
Colombo 0112624444 Colombo, Gampaha & Kalutara
Embilipitiya 0472230181 Rathnapura & Kegalle
Kandy 0812388086/
Kandy, Matale & N'Eliya
Kurunegala 0372267253 Kurunegala & Puttalam
Matara 0412230457  Galle, Matara & Hambantota
Monaragala 0552276133 Monaragala & Badulla
vauniya 0242228300 Vauniya, Kilinochchi, Mulative, Mannar & Jaffna


Up to now there are about 29000 tube wells already constructed in the island for urban and rural water supply systems including private parties and installation of hands pumps.

Capacities of Groundwater Section Click here......

And Click here.....


Guideline for Management of Groundwater sources for piped water supply schemes >> Click here...


භූගත ජල අංශයේ 40 වන සංවත්සරය අභිමානයෙන් සමරමු.

Hydrogelogical Surveys enhances the investigation processes for exposing of possible water resources inside the cavities of Earth. Depending on the Report submitted by Geologists excavations are being done accordingly at the sites.Click here......


Online Groundwater Level Measurements

Groundwater levels measurement is very important tool for Groundwater Studies and Management. Online Groundwater levels measurement through Data Loggers and GPRS system is latest technique of Groundwater levels measurement.

Groundwater Section of the NWS&DB initiated of measuring Groundwater levels Online through Data Loggers and GPRS system in two numbers deep boreholes in Buttala and Maligawila areas in Monaragala district.

The Photographs show initial fixing of Data Loggers at Buttala and Maligawila areas.

Fixing Data Logger in Maligawila





Fixing Data Logger in Buttala




Ground Water  vedio



Write comment (0 Comments)

After the independence of Sri Lanka, then governments had taken several efforts to provide drinking water facilities, specially, the Rural Water Supply activities were implemented at the divisional levels through the Local Authorities. The common dug wells and small scale pipe borne water facilities were constructed during that period.

However, in our country, the great involvement for the Rural Water Supply was commenced after the declaration “Global Water Decade” in 1980. Subsequently, there were several efforts taken by the NWSDB, Government Institutions and Non Governmental Organizations to improve the Rural Water Supply and Sanitation system. As a result, it has been believed that around 4,000 Rural Pipe Borne Water Supply Schemes have been implemented all over the country through several projects and most of the schemes are managed by the beneficiary community. However, in some of the schemes, it has been observed that there are difficulties in its effective function and its sustainability too.

Therefore, after a long study, the action has been taken to establish the Rural Water & Sanitation (RWS) Units by using the existing institutional setup of the NWSDB to ensure the sustainability of the existing Rural Water Supply systems. Initial steps have been taken to establish the above units in 19 districts and it will expand to other districts in due cause.

For more information please visit RWS Website here:

Write comment (0 Comments)

The Head Office of the National Water Supply and Drainage Board is located in Ratmalana. The Head Office overlooks all the island wide operations. A sub office is located about 1 km away at Telawala Road.


The following Divisions / Sections are located in the Head Office.
• Chairman, Vice Chairman and Working Directors Office
• Senior Management (General Manager and Additional General Managers)
• Policy and Strategy Division
• Planning & Designs Division
• Water Supply Projects Division
• Mechanical & Electrical, Energy Services Division
• Information Technology Division
• Development Division
• Tenders & Contracts Division
• Finance Division
• Human Resource Management & Industrial Relations Division
• Commercial Division
• Internal Audit Division
• Corporate Planning Division
• Japanese Projects Unit
• Supplies Section
• Library
• Transport Division
• Sewerage Division
• Publicity Division
• Manpower Development & Training Division
• Research & Development Division
• Rural Water Supply Division
• Ground Water & Investigations Division
• GIS & Mapping Division
• Central Laboratory
• Central Workshop
• Main Stores

The above divisions coordinate and monitor the functions of regional operations.

Contact Details:

Postal Address: Head Office, National Water Supply & Drainage Board, Galle Road, Ratmalana.
General Telephone Nos: 0112611589, 0112612566, 0112637194
General Fax No: 0112636449
Hunting No: 0112638999
(Note: for international direct dialing, please add country +094 instead of leading 0 in all the above numbers)


Location Map:


Write comment (0 Comments)

Central Workshop is the main workshop to the National Water Supply & Drainage Board and running under Deputy General Manager (Mechanical & Electrical Service). This plays a leading role in the O&M (Operational & Maintenance) Sector, giving assistance to the maintenance of Treatment plants and Drainage Systems.

Sections under Central Workshop
  • Vehicle Section
  • Fabrication Section
  • Pump Section & Machine Section
  • Electrical Section
  • Electronic Section
  • Water Meter Testing
Main work carrying out by the Central Workshop
  • Running repair and major repairs of Board vehicles.
  • Vehicle periodic services
  • Engine Overhauling
  • Fabrication of package treatment plants
  • Treatment plant repair work
  • Other Fabrication work
  • Repair to all kinds of Pumps, Valves, Compressors, Generators etc.
  • Electrical repair works, including motor rewinding.
  • Electronic equipment repair work.
  • Testing & issuing test reports for Ferrules, Valves, etc.
  • Drivers, Pump Operators competence tests.
  • Installations of plant & equipment.
  • Site breakdown repair.
  • Quality inspections.
  • Water meter testing
  • Water meter repairing


We are a highly skilled crew in Mechanical & Electrical service looking for the opportunity to assist NWSDB in order to achieve a targeted safe drinking water supply in Sri Lanka.

Chief Engineer,

Central Workshop,


Maligawa Road,


T.P- 0112636327

Fax- 0112624738

Contact Details of Staff Members 
                Section            Name        Designation    Telephone      Fax
 Office  (Central Workshop)   Mr.A.L.S.Sriwardhana  Chief Engineer  0112636327 0112624738 
Mrs. Koshila  Accountant  0112636327
Mrs. Shriyani  Staff Assistant  0112636327
Mrs. Dulani  Supply Assistant  0112636327
 Pump Section     Mr.T.B.P. Priyadharshana Snr. Mechanical Engineer  0112636327
 Mr.K.G.L.P.Kumara  E.A.(Mechanical)  0112636327
 Mr.G.J.D.Alwis  E.A.(Mechanical)  0112636327
 Electrical Section    Mr.Nuwan Dayananda  Electrical Engineer  0112636327
 Mrs.N.Hewavitharana  E.A.(Electrical)  0112636327
 Mr.Indika  Store Keeper  0112636327
 Fabrication Section   Mr.T.B.P. Priyadharshana  Snr. Mechanical Engineer  0112636327
 Mr.Suwaris  E.A.(Mechanical)  0112636327
 Vehicle Section      Mr.Thusara Sadakelum  Mechanical Engineer  0112636327
 Mr.H.A.J.Bandara  E.A.(Mechanical)  0112636327
Mr.K.P.C.De Silva   E.A.(Mechanical)  0112636327
Electronics Section Mr. C.M. Karunarathna Snr.Electronics Engineer 0112636327
Mr.N.Sanjeewa E.A.(Electronic) 0112636327
Meter repair Section Mr. Jayaruwan Mechanical Engineer 0112636327
Mr.Namal  Bandara E.A.(Mechanical) 0112636327


Write comment (0 Comments)

As an engineering institution handling one of the most important engineering systems of a country, NWSDB has lot of engineering designs and engineering planning works of the water distribution system. The Planning and Designs Section is responsible for handling all the design works and engineering planning of distribution system.


P&D Section operates under the Policy & Planning Divsiion (under the authority of the Addl. GM (P&P)) and headed by a Deputy General Manager (P&D). The division consists of Over 30 specialist engineers specilized in various subject areas in the water and sanitation sectors.

Contact Details:



Key Staff Members:



Write comment (0 Comments)

Laboratory Services of National Water Supply and Drainage Board

National Water Supply and Drainage Board Laboratory services are structured as given bellow,

• Central Laboratory Services
• Regional Laboratories
• Plant Laboratories

Each laboratory is under the direction of a Chemist with technical coordination and consultation being provided by an Assistant General Manager (Laboratory Services).

Central Laboratory

Central Laboratory functions as the Center for Water Quality Control. It serves as monitor for the activities of all levels of laboratories.
The Central Laboratory Services implements its sampling and analytical schedule as initiated by the AGM (Laboratory Services). It engages mainly operational monitoring and verification monitoring of water quality, research programs and promotes training. It functions as an active laboratory in water (microbiological, chemical, physical and toxic) wastewater, water treatment chemicals (alum, hydrated lime, bleaching powder, polyaluminium chloride, powder activated carbon & polyacrylamide compounds) heavy metals, volatile organic compounds including pesticides and filter media disciplines. Central laboratory acts in an advisory capacity to process control and serve as the processing center for Analytical data to provide higher management levels in the organization.

Sri Lanka Accreditation Board for Conformity Assessment declares that Central laboratory of National Water Supply & Drainage Board having been found to comply with the accreditation criteria for testing laboratories as described in ISO / IEC 17025 : 2005, has been accredited as a testing laboratory under the field of chemical testing for water treatment chemicals; alum and hydrated lime.

Certificate of accreditation

Metal and Heavy metal analysis 

Atomic Absorption Spectroscopy (AAS)


Atomic absorption spectroscopy (AAS) is a spectroscopic analysis technique that determines the concentration of a particular element in a sample by atomizing the contents of the sample and measuring the absorbance of a wavelength specific to that particular element in the gaseous state.





This is emission mode of spectroscopy and it’s performed to identify and measure a range of chemical elements.






Microbiological Testing

Enumeration of algaes and cyano bacteria are being conducted under this section. In addition to that this is used to observe pathogens and other microbial organisms in wastewater and other water samples in critical situation.


Microbiological Laboratory

Total Coliform Escherichia coli test
Membrane filter method and Colilert method are used to detect and count of Escherichia coli and Coliform bacteria. (SLS 614:2013 / SLS 1461 part 1 section 1 and section 2)


Total Plate Count

Total Plate Count analysis is the calculation of the number of bacterial colonies present in the sample with dilution as needed.

Regional Laboratories

The regional laboratory functions as a field unit with the capability of performing routine microbiological and chemical analyses. The laboratory implements its sampling and analytical schedule initiated by the Regional Chemist. It is responsible for operational monitoring and verification monitoring by engaging with water safety plans to maintain to assure the water quality. An active quality assurance programme is maintained. In addition to that, certain water testing methods have been developed according to the regional water quality issues.

Plant Laboratories

This unit provides the basic data relative to those parameters specified by upper level laboratories. The water treatment plant officers maintain the selected sampling points throughout the system with the coordination of Chemist for the process control of water treatment process. These laboratories are mainly responsible in operational monitoring.


Write comment (0 Comments)