| HONG KONG HYDROGEN ELECTROLYSIS WATER LIMITED | Private company limited by shares | Live |
| SHANGHAI PEOPLE WATER PUMP ELECTROMECHANICAL LIMITED | Private company limited by shares | Dissolved |
| SHANGHAI PEOPLE WATER PUMP ELECTROMECHANICAL LIMITED | Private company limited by shares | Live |
| Water Electronics Company Limited | Private company limited by shares | Live |
| First Water Electronics Limited | Private company limited by shares | Live |
| Elim Living Water Culture Co. Limited | Private company limited by shares | Live |
| Elim Water Treatment Limited | Private company limited by shares | Dissolved |
| Emerald water Limited | | Live |
| CHINA WATER & ENERGY, LIMITED | Private company limited by shares | Live |
| Global Water & Energy Limited | Private company limited by shares | Dissolved |
| GLOBAL WATER & ENERGY LIMITED | Private company limited by shares | Live |
| WATER ENERGY INJECTION LIMITED | Private company limited by shares | Live |
| ENERGY WATER TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| MAU WA WATER ENGINEERING LIMITED | Private company limited by shares | Live |
| MI WATER ENGINEERING LIMITED | Private company limited by shares | Live |
| CHI KO WATER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| WATER KEE ENGINEERING LIMITED | Private company limited by shares | Live |
| HIP LIK WATER ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Sun Fai Water Engineering Limited | Private company limited by shares | Live |
| SBI Water Engineering Limited | | Live |
| Yat Sun Water Engineering Company Limited | | Live |
| BEST WATER ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| FIRST WATER P&D ENGINEERING CO., LIMITED | Private company limited by shares | Live |
| WING TAT (WATER TREATMENT) ENGINEERING CO., LIMITED | Private company limited by shares | Dissolved |
| NANTONG OCEAN WATER CONSERVANCY ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Wai Kit Water Drainage Engineering Limited | Private company limited by shares | Live |
| LAI KI WATER & ELECTRIC ENGINEERING LIMITED | Private company limited by shares | Live |
| HOP SEE WATER & ELECTRIC ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| WAH KEE WATER ELECTRIC ENGINEERING LIMITED | Private company limited by shares | Live |
| O'S AIR-CONDITION & WATER ELECTRIC ENGINEERING LIMITED | Private company limited by shares | Live |
| HENGTONG WATER ELECTRIC ENGINEERING LIMITED | Private company limited by shares | Live |
| MEI WAH WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| PUI SUN WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| WAH TAI WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| NAM KEE WATER ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| PO MAN WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| TAI FOO WATER & ELECTRICAL ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| LEE FAI ELECTRICAL & WATER ENGINEERING LIMITED | | Live |
| Tat Wai Water And Electrical Engineering Company Limited | | Live |
| Wu Da Water & Electrical Engineering Limited | | Live |
| TUNG SING AIR-CONDITION WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| HO CHUNG KEE WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| KAM LOONG WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| MING FAI WATER & ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| Kam Wang Water And Electrical Engineering Limited | Private company limited by shares | Live |
| AQUA FELIX WATER TREATMENT & ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| GENERAL WATER ENGINEERING CO. LIMITED | Private company limited by shares | Live |
| GLOBAL WATER ENGINEERING LIMITED | Private company limited by shares | Live |
| GLOBAL WATER IMPROVEMENT ENGINEERING GROUP LIMITED | Private company limited by shares | Live |
| CHONG HING AIR-CONDITION WATER ELECTRICAL ENGINEERING LIMITED | Private company limited by shares | Live |
| HON HING WATER ELECTRIC AIR-CONDITION ENGINEERING LIMITED | Private company limited by shares | Live |
| KWAN PING WATER ENGINEERING LIMITED | Private company limited by shares | Live |
| Gold Water Engineering & Material Supply Limited | Private company limited by shares | Live |
| PLYFLO WATER TREATMENT ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| WATER & POWER ENGINEERING LIMITED | Private company limited by shares | Live |
| HYDRO WATER POWER ENGINEERING LIMITED | Private company limited by shares | Live |
| PIC POWER WATER RESEARCH AND ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Wai Water Proof Engineering Limited | Private company limited by shares | Live |
| YIU KEE (WATER PROOFING) ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| MEGA WATER PROOFING ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| PUREX WATER TECHNOLOGY & ENGINEERING LIMITED | Private company limited by shares | Live |
| QIAN YI WATER ENGINEERING COMPANY LIMITED | | Live |
| QUALIFIED WATER ENGINEERING LIMITED | Private company limited by shares | Live |
| WANG TAI WATER REPELLENT ENGINEERING LIMITED | Private company limited by shares | Live |
| SHANGHAI PEOPLE ENGINEERING WATER PUMP LIMITED | Private company limited by shares | Live |
| Starz Water Engineering Company Limited | Private company limited by shares | Live |
| SUNRISE WATER PROOF ENGINEERING COMPANY LIMITED | Private company limited by shares | Live |
| Sunrise Water Purification Engineering Company Limited | Private company limited by shares | Live |
| Triumph Water Engineering Company Limited | Private company limited by shares | Live |
| UNITED WATER ELECTRICAL AIR CONDITION ENGINEERING LIMITED | Private company limited by shares | Live |
| Wing Wo Water & Electric Engineering Limited | Private company limited by shares | Live |
| SUN HING WATER WORK ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUN HING WATER WORK ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| HARVEST WATER WORKS ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| HO HING WATER WORKS ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| WING FAI WATER WORKS ENGINEERING LIMITED | Private company limited by shares | Live |
| FU WING WATER WORKS ENGINEERING COMPANY LIMITED | Private company limited by shares | Dissolved |
| Ying Hoi Water & Electrical Engineering Limited | | Live |
| YINTAT WATER & ELECTRIC ENGINEERING LIMITED | Private company limited by shares | Live |
| Zhongdi Water Purification Engineering Limited | | Live |
| ENIGMA WATER SPORTS LIMITED | Private company limited by shares | Live |
| WATER WAY ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| WATER FLAME ENVIRO ENERGY LIMITED | Private company limited by shares | Dissolved |
| ASIA WATER ENVIRONMENT (HOLDINGS) LIMITED | Private company limited by shares | Dissolved |
| Berlin Water Environment HK Limited | Private company limited by shares | Live |
| China Water Environment Group Investment Limited | Private company limited by shares | Live |
| UNDER WATER ENVIRONMENT CONSULTANT (INTERNATIONAL) LIMITED | Private company limited by shares | Dissolved |
| CONWAY WATER ENVIRONMENT DEVELOPING LIMITED | Private company limited by shares | Live |
| POWERCHINA WATER ENVIRONMENT INVESTMENT LIMITED | Private company limited by shares | Live |
| WATER ENVIRONMENT PROTECTION (ASIA) LIMITED | Private company limited by shares | Dissolved |
| CHINA WATER ENVIRONMENT PROTECTION GROUP LIMITED | Private company limited by shares | Live |
| CHINA SUN A ENVIRONMENTAL WATER GROUP LIMITED | Private company limited by shares | Dissolved |
| CHINA ENVIRONMENTAL WATER HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| WATER ENVIRONMENTAL CONCEPTS COMPANY LIMITED | Private company limited by shares | Dissolved |
| Water Environmental Consultants Limited | Private company limited by shares | Live |
| Water Environmental Protection&Energy Development Limited | Private company limited by shares | Live |
| Water Energy Environmental Engineering (Hongkong) Limited | Private company limited by shares | Live |
| WATER ENVIRONMENTAL PROTECTION & ENERGY DEVELOPMENTS LIMITED | Private company limited by shares | Dissolved |
| RHINO ENVIRONMENTAL & WATER ENGINEERING CO. LIMITED | Private company limited by shares | Dissolved |
| Water Environmental Protection Fund Company Limited | Private company limited by shares | Live |