| Date |
Event |
| 10 May |
The "Study on Dietary Exposure to Lead of Secondary School Students" is presented to the Legislative Council Panel on Food Safety and Environmental Hygiene. |
| 23 May to 2 July |
 The second phase of the Anti-mosquito Campaign gets under way with an emphasis on the importance of eliminating mosquito breeding places during the rainy season. |
| 30 May |
Phase 1A of the Licensing Management Information System is launched covering the renewal of existing licences and permits due to expire on or after 1 September 2005, except Liquor Licences, Places of Public Entertainment Licences and Karaoke Establishment Permits. |
| 30 May |
 The Hygiene Manager (HM) and Hygiene Supervisor (HS) Scheme is implemented to strengthen food safety supervision in licensed food premises. |