MAPUSA
Despite being a high-rainfall State with a network of dams designed to secure its water needs, Goa is increasingly confronting an uncomfortable question: is its storage capacity keeping pace with rising demand?
Even as reservoirs remain stocked after successive monsoons, recurring summer shortages and a widening supply gap suggest the issue is not just how much water Goa receives but how much it can store, retain and distribute.
At the centre of this debate are key reservoirs such as Selaulim Dam and Anjunem Dam, which form the backbone of the State’s drinking water system. While official data shows healthy post-monsoon levels, reserves tighten steadily as summer approaches.
According to data available on the WRD website, reservoir levels across Goa show a mixed but concerning trend.
The Amthane dam, which supplies water to Bardez, Pernem and parts of Bicholim has recorded the lowest storage among major reservoirs at just 28%.
The Anjunem reservoir, serving Sattari and parts of Bicholim taluka, has dropped to 42%, while the smaller Panchawadi dam stands at 49%, both falling below the halfway mark.
The Tillari dam, a key source of drinking water for North Goa, is currently at 53%.
Among the larger reservoirs, the Selaulim dam – crucial for meeting the needs of South Goa – holds 60% of its capacity. Meanwhile, the Chapoli dam in Canacona and the smaller Gaunem reservoir have reported relatively higher levels at 62% and 65%, respectively.
What is emerging is a familiar paradox: A State that receives abundant rainfall is increasingly uncertain about its year-round water security.
A narrowing buffer
Goa’s water demand has grown sharply over the past decade, driven by rapid urbanisation, tourism expansion and a proliferation of high-consumption residential projects.
Large residential complexes, villas and hotels – particularly in coastal and urban belts – are placing sustained pressure on stored reserves. Officials acknowledge that dams were designed for a smaller population and lower consumption patterns.
“The reservoirs are holding, but the buffer is shrinking each year. What used to last through summer now needs tighter management,” a senior WRD official said, adding that while population has increased, storage capacity has remained unchanged.
To manage this, the department diverts excess river water into reservoirs during the off-season.
Yet, with the State already facing a daily supply shortfall, pressure on dam storage is expected to intensify.
Siltation eating into capacity
Beyond demand, experts point to sedimentation as a growing concern. Silt deposits accumulate over time, reducing effective storage.
While comprehensive public data on capacity loss remains limited, engineers concede that some of Goa’s older dams are no longer able to store water at their originally designed levels.
Desiltation remains slow due to technical and cost challenges.
“Surveys on sedimentation are underway. We need detailed studies before removal, which requires specialised equipment,” said WRD Chief Engineer Dnyaneshwar Salelkar.
Climate variability adds uncertainty
Rainfall patterns are becoming more erratic, experts say, with short, intense bursts replacing steady monsoon flows.
This reduces water capture efficiency and increases runoff into the sea, raising concerns over how reliably reservoirs can be replenished – especially if weaker monsoons coincide with rising demand.
Govt response: Expansion and augmentation
The State has outlined plans to augment supply and strengthen infrastructure.
Projects linked to expanding output from Selaulim Dam and boosting treatment capacity at Assonora Water Treatment Plant are expected to ease pressure.
Plans are also underway for two new reservoirs/check dams in Dharbandora, with soil investigations in progress. Barrage construction is ongoing in Sal and Ganjem, while a proposed project at Mirabag has faced local opposition.
Alongside this, the government is focusing on improving distribution efficiency to ensure stored water translates into actual supply.
However, progress on long-term measures such as desiltation and new storage creation remains gradual.
A fragile balance
The emerging picture suggests that while Goa’s dams continue to provide a critical buffer, that margin is steadily narrowing.
Much like the gap between tap connectivity and actual supply, the distance between water availability and water security is becoming harder to ignore.
As the State pushes ahead with expansion plans, the question is no longer whether Goa has water – but whether it can hold on to it.
