Bulk Supply
Tariff
Desalinated Water
on Main Interconnected Zone
and Sharqiyah Zone
1. Introduction
Legal Framework & Full Definitions
Legal Basis
Pursuant to Article 74 of the Sector Law (as defined below) and Condition 21 of the Power and Water Procurement License granted by the Authority for Public Services Regulation (APSR), Oman Power & Water Procurement Company (PWP) is required to make Bulk Supplies of Desalinated Water or Pre-COD Water Output to the Nama Water Services Company SAOC (NWS) in accordance with a Bulk Supply Agreement entered into for such purpose, and in consideration of a Bulk Supply Tariff.
Scope & Application
This document sets out the Bulk Supply Tariff, as determined by PWP and approved by APSR, in respect of Desalinated Water Delivered or Pre-COD Water Output delivered to NWS for the period from 1 January to 31 December 2026.
*This Bulk Supply Tariff is not applicable to the Dhofar Water Network.
Definitions
2. Charges for Bulk Supply
Fixed & Variable Charges
The charges for Bulk Supply shall be payable on a monthly basis and shall comprise (i) a fixed charge, payable for the Water Desalination Capacity or Pre-COD Water Output; (ii) a variable charge payable in relation to the quantity of Desalinated Water Delivered or Pre-COD Water Output delivered to NWS and differentiated in rate bands with respect to the time of day.
Fixed Charges
Tariff Band Definitions
Variable Charges (OMR per m³)
| Period / Month | Off-Peak | Night-Peak | Weekday Peak | Weekend Peak |
|---|---|---|---|---|
| January - March | 0.080 | 0.080 | 0.080 | 0.080 |
| April | 0.092 | 0.092 | 0.092 | 0.092 |
| May - July | 0.114 | 0.215 | 0.177 | 0.167 |
| August - September | 0.099 | 0.146 | 0.109 | 0.110 |
| October | 0.092 | 0.092 | 0.092 | 0.092 |
| November - December | 0.080 | 0.080 | 0.080 | 0.080 |
Note: The approved BST is exclusive of the Value Added Tax (VAT), and as per the applicable rates, VAT will be charged over and above the bulk supply charges.
3. Invoicing and Payment
Process & Terms
PWP shall invoice NWS for Bulk Supplies in accordance with the following procedure:
End of Month (Estimated)
Immediately following the end of each month, PWP shall estimate the quantities of Bulk Supplies chargeable to NWS for that month using such reasonable method as it sees fit and shall issue a preliminary invoice on the basis of such estimated quantities.
Post-Delivery (Actual)
As soon as PWP receives the quantity of Desalinated Water Delivered or Pre-COD Water Output delivered each month, as certified by NWS and the relevant Plant owner, the variable charge rate specified in Tables 2 and 3 above shall be applied to the certified quantity of Desalinated Water Delivered or Pre-COD Water Output delivered each month. This shall be accompanied by a supplemental invoice or credit, as applicable, reflecting the adjustments required to the preliminary invoices.
End of Year (Consolidated)
PWP shall issue a full-year consolidated statement (if applicable), shortly following the end of the calendar year, together with a final reconciliation invoice (or credit note).
Payment Terms
Payment of invoices issued as described above shall be made by NWS (as may be applicable) within thirty (30) days of receipt. Where a credit is issued to NWS as described above, the amount shall be settled by way of deduction from subsequent payment(s) of Bulk Supplies charges to PWP unless NWS requests, in writing, that the relevant amount be refunded in cash by PWP, in which case PWP shall make such payment within thirty (30) days of receipt of the written request.
4. Amendments
Under certain circumstances it may become necessary to amend this Bulk Supply Tariff during its period of application. Any such amendment shall only be made in accordance with PWP's Licence and with the approval of APSR. PWP shall provide NWS with details (including the date of application) of any amendment on a timely basis.