Ngong Ping Sewage Treatment Works is first tertiary sewage treatment plant in Hong Kong. It has been in operation since late 2005.

Ngong Ping is located on Lantau Island, the most important outlaying island of Hong Kong that is home to the famous Hong Kong Internatonal Airport and Asia's longest cable car system. Sewage discharge on Ngong Pong relied on distributed septic tanks and soakway systems that imposed severe limitations on the sewage flow that could be handled.