National Water Harvesting and Storage Authority

Hifadhi Maji, Boresha Maisha

Siyoi Dam
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Project Updates

Chemususu Dam

















The dam is located in Baringo County, Koibatek District and has a capacity of 15 million cubic meters or 15 billion litres. Chemususu Dam discharges 35,000 cubic metres or 35 million litres of water per day. It was designed to serve at least 50% of Baringo County population which includes towns and various institutions within the County.


Soin-Koru Dam


The Soin-Koru Dam Development project is proposed to be located on the Nyando River in the vicinity of Muhoroni in the Western part of Kenya. It shall be 60km from Kisumu City and 5km upstream of Muhoroni town. The Dam will be located in Kisumu and Kericho counties.


Siyoi - Muruny Dam

















The proposed Muruny Dam is located near Kapsait Primary School at Murkokoi Center which is approximately 43km from Kapenguria Town. The site location is covered on SK Map 75/4 Cherangany at GPS coordinates 36 N 0761064 and UTM 0129350, elevation 2690 masl at the riverbed. The project area lies within the Rift Valley Drainage Basin. River Muruny emanates from Cherangany Hills and flows in a North Eastern direction before finally draining into Lake Turkana.


Bosto Dam
















The Government of Kenya through NWCPC has prioritized development of the Bosto Dam Water Supply Project in Bomet County. This is one of the main Vision 2013 flagship projects that aim to provide potable water to all in line with constitutional provisions and the right to water and Sustainable Development Goals (SDG).

The proposed dam will be 45m high zoned rockfill dam with an impermeable clay core. The capacity of the reservoir will be 29.5Million cubic meters. Treatment works will have capacity of 80,000m3/day with appropriate water system network and storage facilities to serve an initial population of 550,000 with a coverage area of 1050KM 2.


Kiserian Dam









Kiserian dam is located along Kiserian River about 2kms from Kiserian Township and will supply water to Kiserian, Ongata Rongai and parts of Ngong’ townships. The present (2010) total population of the area is about 124,000 people with a water demand of 8,450m3   per day. The 18m high dam will store 1.22Mm3 of water and supply 15,700m3  per day of water to the townships which will meet the future (2020) water demand.


Maruba Dam

















In June 2010, NWCPC finalized rehabilitation of Maruba dam by raising the height of the embankment wall and spillway by 6 m. This increased the dam’s storage capacity from 0.60 Million m3 to 2.45 Million m3.  Increase in storage volume has ensured increase in water supply to Machakos Town and its environs from 2,050 m3/day to 8,700m3/day. 



Locate Our Dams

Water Sector Board Inauguration, 2019

The Cabinet Secretary, Ministry of Water and Sanitation Mr. Simon Chelugui officiated the inauguration of Board Chairpersons and Board of Directors of National Water Institutions at Maji House, Nairobi on 29th March 2019. The institutions are National Water Harvesting & Storage Authority- NWHSA, Water Resources Authority- WRA, Kenya Water Institute- KEWI, Water Sector Trust Fund- WSTF and Water Services Regulatory Board- WASREB.


Cabinet Secretary, Ministry of Water & Sanitation Mr. Simon Chelugui

The CS congratulated members and chairpersons of various boards saying their selection considered professionalism, gender, religion and a balance of representation. He added that our water sources are polluted and rivers are drying up due to effects of climate change. Hence, he welcomed partnership between the Ministry of Water and Sanitation and the Ministry of Environment and Natural Resources to increase the forest cover and protect water catchment areas. He said the Ministry targets to increase access to clean and safe water from the current 60% to 80% by 2022.

The CAS Winnie Guchu emphasized on the need to re-look at the sanitation component in the water sector saying that this has been ignored yet it is a very critical area. She added that board members should ensure projects are implemented within planned timelines hence monitoring and evaluation will be handy. She urged them to collaborate with other stakeholders in the sector such as the county governments, NGOs and the private sector to increase access to clean water and improve sanitation.


Chief Administrative Secretary, Ministry of Water & Sanitation Ms. Winnie Guchu

 NWHSA’s Board Chair Dr. David Nkedianye said that he is aware of the wider mandate that the Authority has thus his board will join hands with other stakeholders to deliver on the crucial mandate of water harvesting and storage. The inauguration ceremony was held at Maji House, Nairobi.

NWHSA's Board Chairman, Dr. David Nkedianye

Welcome to NWHSA

Water Sector Board Inauguration, 2019

Water Sector Board Inauguration, 2019

The Cabinet Secretary, Ministry of Water and Sanitation Mr. Simon Chelugui officiated the inauguration of Board Chairpersons and Board of Directors of National...

Service Charter

Service Charter

This Service Charter sets out our commitments to our clients and stakeholders with regard to the quality of services that they expect from us. The Charter will...

Who we are

Who we are

National Water Harvesting and Storage Authority (NWHSA) was established under the Water Act 2016, as an autonomous agency reporting to the Ministry of Water an...

Moses Gitonga Ntiritu Works