Oloolaiser Water and Sewerage Company Limited (OWSC) was incorporated on 30th June 2006 under the Companies Act Cap 486 and is wholly owned by the County Government of Kajiado. In line with the provisions of the Water Act, 2002, the company falls under the Tanathi Water Services Board (TAWSB) as a Water Services Provider (WSP) licensed by the Water Services Regulatory Board (WASREB) for the efficient and economical provision of water services within its area of jurisdiction. Enactment of Water Act, 2016 has introduced new institutional arrangements some of which include establishment of Water Resources Authority (WRA) and Water Works Development Agencies (WWDA) to replace Water Resources Management Authority (WRMA) and Water Services Boards (WSB) respectively.
The Company’s service area is approximately 115 km2 and covers six wards namely Ongata Rongai, Olkeri, Keekonyoike, Oloolua, Nkaimurunya and Ngong.Within the company’s area of jurisdiction there are four major towns namely Ongata Rongai, Kiserian, Kahara-Matasia and Ngong. In addition, there are 12 low-income areas (LIAs) that are served by the company. The total population within the Company’s area of jurisdiction was 237,805 in 2009 and is currently approximately 312,000. This population is projected grow to about 370,000 by 2022.
OWSC has four main water sources; Kiserian dam, Magathi River, 18 boreholes and 2 springs (University and Oltiyani). The company produces a total of about 7,500 M3/day and has a customer base of 11,262 connections comprising 7,460 active and 3,622 inactive connections. The company also operates 35 water kiosks.