Siu A Chau (Chinese: 小鴉洲) is an uninhabited island of Hong Kong, part of the Soko Islands group, located south of Lantau Island.
Siu A Chau is the northernmost and the second largest of the Soko Islands, after Tai A Chau. It is dumbbell-shaped and has a rugged indented coastline with steep slopes. The highest point of the island is at 74 meters. There is a small beach at the northernmost point of the island.
In 1937, Walter Schofield, then a Cadet Officer in the Hong Kong Civil Service, wrote that Siu A Chau was "another settlement of early man" and that it had a "fishing village of huts very different from ordinary Chinese dwellings" at the time of writing.
There is a temple on the south side of the island.
A low-level radioactive waste (LLRW) facility began operation at Siu A Chau in July 2005. Low-level radioactive wastes which had previously been stored in disused tunnels, two factories and five hospitals were subsequently transferred to the Siu A Chau facility. Part of this waste was relocated from the disused Mount Parish air-raid tunnels at Queen's Road East, in Wan Chai. The 55 m3 of LLRW stored there had raised objections. The opening ceremony of the facility was held in June 2006.
For A Chau (丫洲) in Tai Po District, see Centre Island, Hong Kong.
A Chau (Chinese: 鴉洲, Jyutping: aa1 zau1, Pinyin: Yāzhōu) is a small island in the inner most of Starling Inlet (Sha Tau Kok Hoi), off Nam Chung, in the north-eastern New Territories of Hong Kong. It is under the administration of North District. The island falls within the Closed Area.
A Chau has been designated as a Site of Special Scientific Interest since 1985. The fauna of the island includes night heron, little egret, great egret, black-headed gull and herring gull. It is also a breeding site for the passage migrants. It was reported in 2007 that A Chau was the largest egretry in Hong Kong and may also have been one of the most important night roosting sites for the ardeids in winter.