| 18-0295: Supply and Delivery of Various Materials for Proposed Feederline Extension. | Addendum 2018-044 | |
| 18-0040: Supply and Delivery of Rugged Handheld Computer & Mobile Thermal Printer for Read and Bill | Addendum 2018-043 | |
| Purchase Request Nos. 18-0085, 18-0126, 18-0305, 18-0314, 18-0321, 18-0330 & 18-0331 | Addendum 2018-042 | |
| 18-0120: Supply and Delivery of 4×4 Pick-Up Vehicle for use by the Technical Services Group (TSG) & other related activities of the office. | Addendum No. 2018-041 | |
| Purchase Request Nos. 18-0260, 18-0264 & 18-0131 (Specification) | Addendum No. 2018-040 | |
| Purchase Request Nos. 16-0506, 17-0040, 18-0084, 18-0102 and 18-0114 | Addendum No. 2018-039 | |
| Purchase Request Nos. 18-0233, 18-0171, 18-0239, 18-0120 and 18-0253 | Addendum No. 2018-038 | |
| Purchase Request Nos. 18-0210, 18-0144, 18-0149, 18-0126 & 18-0236 | Addendum 2018-037 | |
| Purchase Request Nos. 18-0039, 18-0214, 18-0102, 18-0084, 18-0114, 18-0155 & 18-0207 | Addendum 2018-036 | |
| 18-0128: Supply and Delivery of Various Motorcycle Spare Parts for the repair of fleet of motorcycle and tricycles assigned at Administration Group | Addendum_2018-035 | |
| 18-0128: Supply and Delivery of Various Motorcycle Spare Parts for the repair of fleet of motorcycle and tricycles assigned at Administration Group | Addendum_2018-034 | |
| 17-0040: Supply and Delivery of Brand New Vehicles: 3 Units 4×4 SUV Automatic Transmission to be used by the Office of the General Manager and the Board of Directors | Addendum_2018-033 | |
| Purchase Request Nos. 16-0506, 17-0451, 17-0200, 17-0332, 17-0222, 17-0223 & 17-0284, | Addendum No. 2018-032 | |
| Purchase Request Nos. 18-0110 & 18-0184 | Addendum 2018-031 | |
| Purchase Request Nos. 18-0079, 18-0126, 18-0149, 18-0150, 18-0151, 18-0182, 18-0120, 18-0144 & 18-0145 | Addenddum 2018-030 | |
| 18-0187: Supply and Delivery of One (1) unit Coffee Maker for General Manager’s Office | Addendum 2018-029 | |
| Purchase Request Nos. 18-0110 & 18-0141 | Addendum 2018-028 | |
| Purchase Request Nos. 18-0110 & 18-0141 | Addendum_2018-027 | |
| Purchase Request Nos. 18-0038, 18-0153, 18-0124, 18-0084, 18-0114, 18-0122 & 18-0123 | Addendum 2018-026 | |
| 18-0081: Lease of Venue Including Meals for RTC and In-house Trainings for 2018 trainings, orientations, lectures and meetings of ZCWD | Addendum 2018-025 | |
| 18-0141: Supply and Delivery of Mimeographing Paper to be used at various ZCWD Department/ Division | Addendum 2018-024 | |
| Purchase Request Nos. 18-0158 & 18-0128 | Addendum 2018-022 | |
| Purchase Request Nos. 18-0099 18-0102 & 18-0107 | Addenddum 2018-021 | |
| Purchase Request Nos. 18-0158 & 18-0128 | Addenddum 2018-020 | |
| Purchase Request Nos. 18-0049, 17-0517, 18-0066 & 18-0088 | Addenddum 2018-019 | |
| Purchase Request Nos. 18-0039, 17-0517 & 18-0040 | Addenddum 2018-018 | |
| Purchase Request Nos. 18-0110, 18-0112 & 18-0113 | Addendum 2018-017 | |
| Purchase Request Nos. 16-0556, 17-0451, 17-0517, 18-0039, 18-0040 & 18-0081 | Addendum 2018-015 | |
| Purchase Request Nos. 18-0110, 18-0112, 18-0113 & 18-0063 | Addendum 2018-014 | |
| Purchase Request Nos. 17-0040, 17-0223 & 17-0284 | Addendum 2018-013 | |
| Purchase Request Nos. 17-0040 & 17-0223 | Addendum 2018-012 | |
| 18-0063: Supply and Delivery of Fire Hose for use at Old Reservoir and Water Treatment Plant (Cleaning of Basins) | Addendum 2018-011 | |
| 18-0063: Supply and Delivery of Fire Hose for use at Old Reservoir and Water Treatment Plant (Cleaning of Basins) | Addendum 2018-010 | |
| 16-0186: Supply & Delivery of One (1) unit Infrared Thermal Measuring Device for Mainline Expansion & Rehabilitation Division | Addendum 2018-009 | |
| 18-0072: Supply and Delivery of Wrist Watch to be awarded during the 44th Anniversary of the ZCWD on April 02, 2018 to employees who have rendered 30 years in service | Addendum 2018-007 | |
| 17-0351: Supply, Installation, Testing & Commissioning of Brand New Lathe Machine with complete accessories for machining of various equipment & materials at WTP (Specification and Schedule) | Addendum 2018-005 | |
| Purchase Request Nos. 17-0374 & 17-0392 | Addendum 2018-004 | |
| Purchase Request Nos. 17-0374 & 17-0392 | Addendum 2018-003 | |
| Purchase Request Nos. 17-0127 & 17-0392 | Addendum 2018-002 | |
| 17-0127: Supply and Delivery of Office Chair for use at Collection Section | Addendum 2018-001 | |