Our Services

Oloolaiser Water and Sewerage Company’s core business is to ensure that residents of Ongata Rongai, Kiserian,Matasia and Ngong townships and their environs have access to clean water and Sewarage services.

Water Supply

Supply and distribution of clean water to households and businesses


We offer Water quality testing services in accordance with KEBS and WHO standards for water.

Installation of Pipe network

Installation and maintenance of water distribution pipe networks within our Service Area

Installation of water Meters

Installation of water meters for all Connection


We build and Maintain Public sanitation Facillities

Sewarage services

We strive to make sure we have dealed with the seware problem in our Towns

About us

Oloolaiser Water and Sewerage Company Limited is a water service provider incorporated on 30th June 2006 under the Company’s Act, Cap 486. The company is a wholly owned subsidiary of the County Government of Kajiado and has its headquarters at Isalu Centre Ground Floor along Magadi Road in Ongata Rongai.The company has Customer Care Offices at Ongata Rongai Chief’s Office,Gataka Assistant County Commissioner’s Office, Nkaimurunya,Kiserian Water Office, Matasia,Silanka,Ngong,and Bulbul trading centre.

The Company’s formation arose from the enactment of the Water Act 2002, which created new institutions to manage water resources and services in Kenya, The Company took over provision of water and sewerages services from the Ministry of Water and Irrigation and National Water Conservation and Pipeline Corporation who were responsible for water services in Ngong,Ongata Rongai and Kiserian Townships.

The Company operates under a service provision agreement with Tanathi Water Services Board, a state corporation to provide sustainable and efficient water and sewerage services within Ongata Rongai, Kiserian, Ngong, Kahara, Silanga and their environs and still expanding coverage.

Oloolaiser Company Portfolio

We serve clients ranging from institutions,Industries( manufucturing),Homes and Hotels


This is the main Water source for our Cluster Area.It was constructed and commissioned by Tanaathi water services baord.


This facility was constructed by Safisan for low income areas of oloolaiser water company,who maintains the facility for the public.


This facility was constructed by Safisan for low income areas of oloolaiser water company,who maintains the facility for the public.


This seware treatment plant was constructed by GIZ for Oloolaiser to be able to treat seweres within the cluster area.

The Management Team

We have a Team of vibrant Technical and hand-on experience Managers

Alpha Mosomi

Ag.Managing Director

Reginah Mutunga

Ag.Finance Manager

Wilson Munguti

Technical Manager

Florence Sawoina


Nicholas N.Kuntai

Ag.Commercial Manager

Geoffrey Shisanya

Procurement Officer

John Wekesa

Internal Auditor


Board of Directors Members

Samson Ole kereya

Chairman,Board of Directors

Francis Mwaura Mwangi

Chair Audit Committee

Isaac Lebooi

Chair Finance and Administration commitee

Lt. Col. (Rtd) Dominic Mukundi

Business and strategic Committee Chair

Serea Mopel

Board Member

Joan Metain

Board Member


Active Connections


Daily Customers services


National/International Partners

7 Days a week

Clean Water Supply

Oloolaiser Water Tariffs

As a public limited Company,we adhere to the guideline on National and international water set up tarrifs guidelines for compliance.Please Go to our download page for downloads on More information on tariffs guidelines by Water Services Regulatory Board


Apply for Connection


Apply for Connection


Apply for Connection


Apply for Connection

Recent Blogs

We keep you upadated on all matters pertaining Oloolaiser water Company And all activities with our stake-holders

The County Goverment of Kajiado

January 20, 2018

The County Water sector has been streamlined for better services.

The Ministry of Water

November 09, 2017

Infrastructural Development partnership with Water Ministry.

The National Water Trust Fund

Feburary 09, 2018

The National Water Trust Fund Congratulates Oloolaiser water Company

Contact Us

Our Head office is in Ongota-Rongai,Isalu centere,Along Magadi Road.We have satellite Offices at Ongata Rongai Town, Kiserain, Matasia and Ngong