| ELECTRICAL & MECHANICAL MAINTENANCE, INC.New Port Richey, FL · Active | New Port Richey, FL | Corporation | Dec 11, 2023 | Active |
| NORTH FLORIDA COMMUNITY WATER SYSTEMS, INC.New Port Richey, FL · Active | New Port Richey, FL | Corporation | Dec 1, 2022 | Active |
| COLLIER UTILITY COMPANYNew Port Richey, FL · Active | New Port Richey, FL | Corporation | Nov 20, 2020 | Active |
| UNIVERSAL CONTROLS INSTRUMENT SERVICES, INC.New Port Richey, FL · Active | New Port Richey, FL | Corporation | Oct 5, 2020 | Active |
| ROYAL WATERWORKS, INC.New Port Richey, FL · Active | New Port Richey, FL | Corporation | Apr 24, 2019 | Active |
| LIFT STATION SERVICES PRC, INCNew Port Richey, FL · Active | New Port Richey, FL | Corporation | Dec 12, 2011 | Active |
| U.S. WATER/WADE TRIM, LLCNew Port Richey, FL · Inactive | New Port Richey, FL | LLC | May 12, 2005 | Inactive |
| U.S. WATER SERVICES CORPORATIONNew Port Richey, FL · Active | New Port Richey, FL | Corporation | Apr 30, 2003 | Active |
| SOUTHEASTERN FLORIDA PUMP LLCPompano Beach, FL · Active | Pompano Beach, FL | LLC | Nov 4, 2022 | Active |
| CR INDUSTRY HOLDINGS INCTarpon Springs, FL · Active | Tarpon Springs, FL | Corporation | Feb 20, 2025 | Active |
| PASCO UTILITIES, INC.New Port Richey, FL · Inactive | New Port Richey, FL | Corporation | Jul 21, 1967 | Inactive |
| HOLIDAY UTILITY COMPANYNew Port Richey, FL · Inactive | New Port Richey, FL | Corporation | Jul 25, 1969 | Inactive |
| TECHNICAL SALES CORPORATIONTampa, FL · Inactive | Tampa, FL | Corporation | Sep 20, 1979 | Inactive |
| U.S. WATER SERVICES, LLCNew Port Richey, FL · Active | New Port Richey, FL | LLC | Sep 16, 2026 | Active |
| BLACKBURN CONTROLS, INC.Fort Myers, FL · Inactive | Fort Myers, FL | Corporation | Jun 29, 1990 | Inactive |
| HILLSBOROUGH WATERWORKS, INC.New Port Richey, FL · Inactive | New Port Richey, FL | Corporation | Jan 8, 2013 | Inactive |
| LAKE OSBORNE WATERWORKS, INC.Port Richey, FL · Inactive | Port Richey, FL | Corporation | Mar 4, 2013 | Inactive |
| BREVARD WATERWORKS, INC.New Port Richey, FL · Inactive | New Port Richey, FL | Corporation | Mar 4, 2013 | Inactive |
| HEATHER HILLS WATERWORKS, INC.Bradenton, FL · Inactive | Bradenton, FL | Corporation | Feb 29, 2016 | Inactive |
| GATOR WATERWORKS, INC.New Port Richey, FL · Inactive | New Port Richey, FL | Corporation | Jan 16, 2018 | Inactive |
| DUVAL WATERWORKS, INC.New Port Richey, FL · Inactive | New Port Richey, FL | Corporation | Aug 30, 2019 | Inactive |
| OKALOOSA WATERWORKS, INC.New Port Richey, FL · Inactive | New Port Richey, FL | Corporation | Feb 13, 2020 | Inactive |
| LAKE TALQUIN WATERWORKS, INC.New Port Richey, FL · Inactive | New Port Richey, FL | Corporation | May 20, 2020 | Inactive |
| U.S. WATER HOLDCO, INC.New Port Richey, FL · Active | New Port Richey, FL | Corporation | Sep 14, 2026 | Active |
| H20 UTILITY SERVICES, INC.Holiday, FL · Inactive | Holiday, FL | Corporation | Sep 16, 1993 | Inactive |
| BENRO ENTERPRISES, INC.Tampa, FL · Inactive | Tampa, FL | Corporation | Feb 17, 1997 | Inactive |