HONG KONG — Hundreds of residents in the massive Taikoo Shing housing estate are demanding urgent government intervention after opaque black contaminants were discovered in their drinking water supply, sparking fears over public health and prompting calls for accelerated infrastructure replacement. The issue is suspected to stem from the deterioration and flaking of internal asphalt linings within the aging water pipes.
Lawmaker Michael Tien Puk-sun, convener of the Roundtable, disclosed that water quality in 14 residential towers across the sprawling complex has been compromised. The issue was traced to at least three broken filtration screens within the system, one of which was severely damaged. While the Water Supplies Department (WSD) has reportedly replaced the compromised filters, residents remain apprehensive about the safety of their tap water, raising broader concerns about Hong Kong’s vast network of older infrastructure.
Calls for Expedited Pipe Cleaning and Replacement
Mr. Tien is publicly pressuring the government to implement swift, localized solutions for the affected community. He emphasized that cleaning must now extend beyond ground-level and rooftop storage tanks—which are already undergoing service—to address the pipes inside individual homes.
“Despite assurances that the WSD has addressed the filters, the core issue of integrity within household pipes remains a grave concern,” Mr. Tien stated in a social media release.
He proposed several actionable steps to restore public confidence and expedite cleaning services:
- On-Site Registration: Establishing a dedicated registration desk in the lobby or ground floor of every affected residential block to allow tenants to immediately sign up for professional, in-home pipe cleaning services.
- Rapid Response: Mandating relevant government departments to arrange the cleaning service within “one to two days” of registration to minimize residents’ reliance on potentially contaminated water.
Previous attempts to register for these services resulted in lengthy queues and excessively long wait times, frustrating residents seeking immediate relief. Mr. Tien urged residents to register promptly and offered his political office’s assistance in following up if they find registration points are not properly established.
Long-Term Infrastructure Crisis Looms
Addressing the immediate contamination crisis must be paired with significant action on long-term infrastructure decay, according to Mr. Tien. He highlighted that an estimated 700 kilometers of water mains across Hong Kong still utilize internal asphalt coatings applied for rust prevention. Over time, these coatings inevitably degrade and peel, leading to the kind of sediment now plaguing Taikoo Shing.
The government had previously proposed a phased, ten-year timeline for replacing these aging pipes, partially citing financial constraints, and maintaining that asphalt flaking was not the primary driver for replacement schedules.
The lawmaker sharply criticized this approach and the official stance that water containing these asphalt flakes poses no public health risk. “While experts may cite technical safety standards, the reality is that no resident wants to consume water containing black sediment,” Mr. Tien asserted, calling the official reassurance “detached from reality.”
He is demanding the government replace all 700 kilometers of the decaying pipes with modern, food-grade stainless steel alternatives within five years, requiring an increased annual replacement rate of 140 kilometers.
Despite stepping down from legislative electoral pursuits, Mr. Tien vowed to continue advocating for these community interests in his capacity as the Roundtable’s convener. The incident underscores a critical need for substantial investment in Hong Kong’s water infrastructure renewal to ensure long-term public trust and safety. Residents are keenly awaiting the WSD’s comprehensive plan for not only addressing the immediate localized contamination but also the broader city-wide issue of aging water mains.