In 1989, a sewage disposal strategy was formulated by the Government. Since then, 16 Sewerage Master Plans have been produced by Environmental Protection Department to cover all of Hong Kong, viz.

1. East Kowloon Sewerage Master Plan

2. Hong Kong Island South Sewerage Master Plan

3. Tolo Harbour Sewerage Master Plan

4. Tsuen Wan, Kwai Chung and Tsing Yi Sewerage Master Plan

5. North West Kowloon Sewerage Master Plan

6. Port Shelter Sewerage Master Plan

7. Central, Western and Wan Chai West Sewerage Master Plan

8. Yuen Long and Kam Tin Sewerage Master Plan

9. North and South Kowloon Sewerage Master Plan

10. Chai Wan and Shau Kei Wan Sewerage Master Plan

11. Tuen Mun Sewerage Master Plan

12. Wan Chai East and North Point Sewerage Master Plan

13. North District Sewerage Master Plan

14. Aberdeen, Ap Lei Chau and Pok Fu Lam Sewerage Master Plan

15. Outlying Islands Sewerage Master Plan

16. Tseung Kwan O Sewerage Master Plan

Various projects have been proposed under these Studies and Drainage Services Department assumes the role of works agent to implement the proposed works.