Residents in Nairobi and parts of Kisumu County are expected to experience water supply challenges following separate public notices issued by Nairobi City Water and Sewerage Company and Kisumu Water and Sanitation Company (KIWASCO).
In a notice to customers, Nairobi Water announced a 35 per cent reduction in water production at Ng’ethu and Kigoro Water Treatment Plants with immediate effect, citing declining water levels at Thika/Ndaka-ini Dam.
The company attributed the decline to below-average rainfall in the dam’s catchment area, which has reduced water inflows and necessitated temporary restrictions on water abstraction to preserve the available reserves.
Nairobi Water warned that consumers should expect extended water rationing periods as the situation persists, urging residents to use the available water prudently.
The supply reduction is also expected to affect customers served by several other water companies, including Githunguri, Kiambu, Karuri, Mavoko, Olkejuado and Oloolaiser Water and Sewerage Companies.
Meanwhile, KIWASCO has announced a week-long valve-throttling trial along the Kajulu Main Line as part of preparations for the installation of a bulk meter.
In a public notice dated November 7, 2026, the company said the exercise will begin on Tuesday, November 10, at 9:00 a.m. and end on Tuesday, November 17, at 6:00 p.m.
KIWASCO cautioned customers that the exercise could result in low water pressure or temporary interruptions in supply across several areas.
Among the areas expected to be affected are Kajulu, Guba, Kamrongo, Mamboleo, Wathorego, Alango, Chiga, Kibos, Ragumo, Moolamazi, Migosi, Lolwe, Kenya-Re, Tido, Mbeme, Riat-Airport, Kanyamedha, Kisian, Kirembe, Otonglo, Nawa, Ogango, Riat College, KeRRA, Uzima University, Obunga, Nyawita, Kona Mbaya, Ridge Parks, Lago Resort, Wigot, Loose Uzima, Kondele, parts of Manyatta, Russia Hospital and Polyview, including neighbouring estates.
Both notices come as water utilities move to manage supply challenges and improve water distribution amid growing pressure on available resources.
