Nam Van Lake lacking proper water quality maintenance

Lawmaker Leong Sun Iok has raised concerns over the ongoing water quality issues at Nam Van Lake, citing reports of odors and floating debris that continue to affect its usability despite government treatment efforts.

The lake attracts many residents to participate in activities such as water biking, dragon boating, canoeing, and rowing, and has also become an important base for promoting the development of water sports and outdoor activities in the city.

In the early years, Macau’s domestic sewage was discharged directly into the sea without treatment, resulting in a large amount of silt and sludge accumulating at the bottom of the lake.

Before the handover, the Nam Van area launched the artificial lake project, which made it necessary to use the gates to exchange lake water with seawater on a regular basis.

Later, the government gradually renovated part of the lakebed and set up the Nam Van Lake Water Sports Centre to meet the public’s demand for safe and diversified water sports spaces.

However, the water quality of Nam Van Lake has always been a concern.

Although the government has carried out some treatment, some residents have reported from time to time that unpleasant odors and floating debris are still occasionally seen on the surface of the lake, which affects the stability of water quality and the willingness of citizens to use it.

According to the “Macao Environmental Report 2024,” the water quality of Nam Van Lake has remained at a medium uranium level for many years, which is not satisfactory.

“How can the government ensure that the relevant concessionaires strictly follow the water exchange guidelines and address abnormal situations immediately?” Leong asked.

He added, “If the water quality of the lake deteriorates or there are special circumstances, the concessionaire must increase or decrease the number of water changes according to the requirements of the department.”

The water exchange of Nam Van Lake is required at least six times a month.

According to the Municipal Affairs Bureau (IAM), it develops a monthly water change plan for the lake according to tide conditions.

The Sports Bureau (ID) said it had established regular communication with IAM and would cooperate with water changes and water quality inspections to ensure the safety and health of users.

The ID added that it is also conducting regular inspections and maintenance of the facilities at the Nam Van Lake Nautical Center. Times Reporter