Durban residents are facing water disruptions following damage to a critical valve at Nagle Dam, prompting the eThekwini Municipality to collaborate with uMngeni-uThukela Water on an emergency rationing plan to preserve remaining water volumes.
The incident occurred on or about March 11, 2026, during routine maintenance on Aqueduct 3, which transfers raw water from Nagle Dam to the Durban Heights Water Treatment Works. An isolation valve became stuck in a closed position, resulting in a daily deficit of approximately 150 megalitres (150 million litres) of raw water that could not be supplied for treatment and distribution across parts of the metro.
A spokesperson for uMngeni-uThukela Water, speaking from the Durban Heights facility, explained that technical teams identified the issue when an artisan noticed the valve was seized during maintenance. The damage was not described as extensive, involving primarily one valve, but repairs proved challenging due to the confined, subterranean working environment, siltation issues, and the need for divers and heavy lifting equipment to handle the one-ton valve.
Complications arose when a plan B to bypass the damaged valve encountered another seized isolation shut-off valve. However, by early the day prior to the report, teams successfully bypassed the seized section, allowing raw water supply to resume at the full 150 megalitres per day. Purification processes at Durban Heights recommenced, with water gravitating from Nagle Dam — a distance of 43 kilometres — starting the previous afternoon.
The spokesperson noted that the exact cause of the valve becoming stuck remains under technical assessment and could not be speculated upon definitively at the time, attributing such incidents to normal wear and tear in the water value chain, which is why routine maintenance is conducted.
Affected areas include central, south central, northern suburbs, as well as regions such as Inanda, Ntuzuma, and KwaMashu. The eThekwini Municipality has activated five water tanker filling points at Mobeni depot, Jeffels Road depot, Pinetown depot, Canelands, and Elvis Stone Neck Reservoir to provide relief.
Under the rationing plan, certain areas will receive water only in the morning, while others will have supply in both the morning and afternoon. Specific details on affected zones were pending release from the municipality at the time of the report.
The spokesperson indicated that uMngeni-uThukela Water anticipates full operations at the Durban Heights facility by Monday (March 16, 2026). However, due to the need to refill multiple reservoirs in the municipal network, full recovery for the metro could take one to two weeks. Low-lying areas are expected to recover first.
Both entities urged residents to use water sparingly during the recovery phase, emphasizing that conserving limited supplies would prevent further inconveniences, particularly for higher-lying areas. The spokesperson acknowledged frustrations in areas without water but stressed the importance of conserving whatever is available, noting that “better little than nothing at all” as additional relief measures continue.
The municipality and uMngeni-uThukela Water are jointly managing the situation to stabilize the system and restore normal supply as quickly as possible.