Excessive ammonia levels disrupt water supply in Johor Bahru and Skudai, sparking urgent response
Tens of thousands of water consumers in Johor Bahru and Skudai faced major disruptions after high levels of ammonia contaminated the Sultan Ismail Water Treatment Plant’s raw water source. The incident prompted immediate mitigation by state water operator Ranhill SAJ and calls for greater environmental accountability.
Thousands Affected by Water Supply Disruption
On July 23, nearly 40,000 consumer accounts in Johor Bahru and Skudai were affected after ammonia contamination was detected in the raw water source feeding the Sultan Ismail Water Treatment Plant. Ranhill SAJ CEO Anuar Abdul Ghani labelled the incident a serious case of water pollution, which disrupted clean water access to households across both regions.
Ammonia’s Threat to Health and Environment
“High concentrations of ammonia can pollute river water and make it unsafe for use. This not only harms the environment but also poses health risks to the public,” Anuar warned. The contamination source is suspected to stem from untreated sewage, industrial waste, and unregulated agricultural runoff—common contributors to ammonia spikes in water systems.
Swift Mitigation and Ongoing Monitoring
Ranhill SAJ responded with prompt containment efforts, reducing affected accounts from 40,000 to fewer than 1,000 by July 25. The company is closely monitoring pollution levels and working with multiple government agencies to trace and resolve the contamination source. Water samples have been collected from the affected sites for detailed analysis.
Community Engagement and Spiritual Response
In a symbolic act of unity and faith, Ranhill SAJ organised a solat sunat istisqa (prayer for rain) at the treatment plant, led by Johor Islamic Religious Department’s Guru Takmir, Zunnurain Abdul Khohar. Attended by staff and local residents, the prayer highlighted both the physical and spiritual dimensions of the crisis.
Call for Environmental Responsibility
The company urged local communities, industries, and authorities to safeguard rivers and natural water sources. “Everyone must play a role in preserving water quality,” said Anuar. Ranhill SAJ emphasized that the sustainability of Johor’s clean water resources depends on collective action against pollution.
Broader Implications for Regional Water Security
This ammonia contamination incident raises alarms not only for Malaysia but also for nearby regions like Singapore and Indonesia, which maintain strong economic and environmental ties with Johor. It underscores the urgent need for cross-border cooperation in pollution control and water resource management to prevent future crises and protect public health.
The ammonia contamination incident in Johor highlights the fragility of essential water infrastructure when faced with unchecked pollution. While swift action by Ranhill SAJ helped reduce the immediate impact, the situation serves as a critical reminder of the shared responsibility to protect natural resources. For Indonesians and Singaporeans alike—many of whom have direct economic, social, and environmental ties to Johor—this event underscores the importance of cross-border cooperation, sustainable industrial practices, and active community involvement to ensure long-term water security in the region.
Sources: Free Malaysia Today (2025) , Straits Times (2025)
Keywords: Ammonia Contamination, Johor Water Supply, Sultan Ismail Plant, Ranhill SAJ, Public Health, Water Crisis
