A zero-discharge policy in Selangor has cut emergency water pollution incidents by 65%, stabilising supply and improving river quality.
SHAH ALAM: Emergency water source pollution cases in Selangor fell by 65% last year compared to 2024. State Public Health and Environment Committee chairman Jamaliah Jamaluddin (pix) said this sharp decline reflects the effectiveness of the Zero Discharge Policy.
The policy, implemented in August two years ago, has strengthened water supply stability. No major water treatment plant shutdowns due to pollution have been recorded since its introduction.
Jamaliah stated this has reduced the risk of supply disruptions for domestic and industrial users. She added that Water Quality Index readings for major rivers remain in Class II and above, indicating safe raw water sources.
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Only 28 pollution cases were reported in 2025. This compares to 80 cases in 2024, 76 in 2023, 71 in 2022 and 64 in 2021.
“The 65% reduction proves that the ZDP is effective in reducing the risk of water source pollution,” she said. She noted improved compliance in industrial wastewater management and more efficient treatment systems.
Several factories have implemented compliant wastewater recycling and treatment systems. This has reduced the operational impact of industries on rivers.
The policy strengthens existing 2012 regulations by requiring wastewater treatment before discharge. It is enforced through an Effluent Discharge Licensing System that monitors quality and quantity.
Licensed premises must conduct self-monitoring with sampling at accredited labs. They are required to submit reports to the Selangor Water Management Authority every three months.
Enforcement action is taken against those who fail to comply with standard limits. This ensures water source quality is not compromised.
Jamaliah said the state government is committed to strengthening policy and enforcement. The goal is to ensure water resource sustainability for current and future generations.
The success of Selangor’s Zero Discharge Policy has attracted interest from other states. Several are now seeking to adopt a similar approach to curb industrial pollution.
