1989 - Formulation of the Strategic Sewage Disposal Scheme
1994 - Commencement of works on Harbour Area Treatment Scheme (HATS) Stage 1
1997 - Commissioning of chemically enhanced primary treatment works at Stonecutters Island, as part of HATS
2001 - Full commissioning of HATS Stage 1
2004 - Public consultation on the way forward for HATS conducted
2009 - Commencement of works on HATS Stage 2A
2011 - Cross Harbour Race returned in Victoria Harbour
2012 -14 - Seven Tsuen Wan beaches reopened
2014 - Breakthrough of deep tunnel system
2015 - Full commissioning of HATS Stage 2A, Maiden Voyage for Clean Harbour 1 and Clean Harbour 2
2016-18 - Numerous national and international awards won for the HATS project
