Nairobi City Water and Sewerage Company (NCWSC) was incorporated in December 2003 under the Companies Act cap 486. It is a wholly-owned subsidiary of Nairobi City County with the main responsibility of providing and managing water and sewerage services in Nairobi, while the asset holding body, Athi Water Works Development Agency (AWWDA) is charged with the responsibility of developing key water and sewerage infrastructure.