SHAH ALAM, Jan 2 — A total of 569 District Metering Zones (DMZs) have been established by Pengurusan Air Selangor Sdn Bhd (Air Selangor) since 2017 across Selangor, Kuala Lumpur, and Putrajaya to reduce non-revenue water (NRW), improve water flow monitoring and speed up leak detection.
This follows the setup of six new DMZs between January and September last year — four in Klang and two in Kuala Lumpur — covering 2,904 connections and saving an estimated 2.02 million litres of water per day.
“The average NRW reduction across the six new zones is approximately 33 per cent, demonstrating strong performance outcomes in targeted high-risk areas,” the state water operator said in its Sukuk Kelestarian 2024-2025 Impact Report.
Each DMZ denotes a section of the water distribution network, allowing precise measurement of inflow and consumption patterns to identify anomalies, detect leaks, and reduce NRW.
WIth the six additional zones, 26,547 connections have benefited from the initiative.
“The continued expansion of DMZs in 2025 demonstrates Air Selangor’s commitment to NRW reduction and water efficiency.
“With 569 zones established to date and plans to increase further coverage progressively, the DMZ programme remains a key driver of sustainable water management, operational excellence, and meaningful environmental impact supported through Sustainability Sukuk financing,” Air Selangor said.
Meanwhile, on its Automation of Key Valves (AKV) programme to boost operational efficiency, enhance network resilience and remotely monitor valves, Air Selangor said 379 points from main reservoirs to distribution lines were slated for automation between December 2023 and November 2026.
“As of today, 65 valves have been successfully integrated, representing 17 per cent. The completed percentage covers key strategic areas such as Sungai Selangor, Sungai Semenyih, Sungai Langat, and the Langat 2 Scheme main trunk.
“The remaining valves are currently work in progress,” it added.
The AKV allows valves to be monitored and controlled remotely, reducing isolation time from around four hours to under 30 minutes, cutting overtime claims by RM310,090.91 and saving 159,180km in fuel and travel expenses per month.
Previously, valves along major pipelines were operated manually, with technicians deployed to the field for burst pipes, pressure changes, or maintenance.
The DMZ and AKV initiatives are Air Selangor’s broader efforts to reduce water loss, improve network resilience, and enhance service reliability for its consumers.
