Sri Lanka’s capital is facing a mounting urban water emergency as prolonged dry weather, falling reservoir levels, and aging infrastructure push supply systems to the brink, raising fears of prolonged shortages.

Colombo is grappling with a worsening drinking water crisis, with authorities warning that prolonged dry weather and rapidly declining reservoir levels are severely straining the city’s supply network. The situation has raised concerns over the sustainability of water distribution in Sri Lanka’s most densely populated urban region.

The crisis has been triggered by an intense dry spell that has sharply reduced water availability in key reservoirs feeding the capital. The Labugama and Kalatuwawa reservoirs – critical sources of treated water – have experienced significant drops, forcing officials to introduce strict management measures.

The National Water Supply and Drainage Board (NWSDB) has already implemented controlled water cuts and distribution schedules in several areas to cope with the shortfall. Officials say the situation could deteriorate further if rainfall does not materialise soon.

Urban Demand and Infrastructure Gaps Worsen Crisis

The crisis has been compounded by rising urban demand and long-standing infrastructure constraints. Colombo’s growing population and expanding commercial activity have steadily increased pressure on water resources, while investments in new supply systems have lagged.

Authorities note that the city’s water infrastructure has seen limited expansion over the past decade, despite repeated shocks – including the Easter attacks, the COVID-19 pandemic, and the 2022 economic crisis – which disrupted funding for major projects. As a result, water capacity has remained largely unchanged even as demand has surged.

Currently, a significant portion of Colombo’s water supply depends on the Ambatale treatment plant, which draws from the Kelani River. While this source has remained relatively stable, the remaining supply – dependent on reservoirs – is under severe stress.

Officials warn that without immediate conservation efforts and rainfall, the gap between supply and demand could widen, leading to more frequent and prolonged water cuts across the metropolitan area.

Emergency Measures and Public Cooperation Urged

In response to the crisis, authorities have introduced a series of emergency measures aimed at managing limited water resources. These include scheduled water cuts, pressure reductions, and increased monitoring of supply systems.

NWSDB has implemented 12-hour water cuts in April across multiple zones as reservoir levels dropped sharply due to high temperatures and lack of rainfall. Although restrictions were temporarily lifted during the Sinhala and Tamil New Year festivities, officials indicated that such relief measures are unlikely to continue if dry conditions persist.

A special operations committee has also been established to oversee water distribution and ensure efficient use of available resources. The committee is tasked with conducting daily and weekly reviews of supply conditions and coordinating responses to emerging challenges.

Authorities have urged the public to minimise water wastage, particularly in households, schools, and public institutions. Conservation, they stress, will be critical in sustaining supply during the ongoing dry spell.

Climate Risks and Long-Term Solutions

Meteorological officials have warned that climate variability could prolong the crisis. The possibility of an El Niño event during the upcoming southwest monsoon season raises concerns about below-average rainfall in the coming months, potentially extending drought conditions until September.

Experts argue that the current crisis underscores the urgent need for long-term investment in water infrastructure and climate resilience. Planned projects, including new treatment plants and expanded capacity, are expected to come online only in the latter part of the decade, offering limited immediate relief.

In the meantime, Colombo’s water system remains vulnerable to seasonal fluctuations and extreme weather patterns. The ongoing crisis highlights the broader challenges facing urban water management in Sri Lanka, where rapid urbanisation, climate change, and underinvestment intersect.