Tenders


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Tender Instruction

The tender document can be purchased from Oman Water and Wastewater Services Company (Nama Water Services) e-tendering page (Supplier Login) from the date of publication of this announcement until the last date of purchase. 
The applicants shall pay the tender fee through the electronic payment gateway on the Supplier Login page. Applicants who are not registered with Oman Water and Wastewater Services Company (Nama Water Services) shall register at https://owwsc.nama.om/Business-with-Us/Vendor-Registration to obtain login credentials for the Supplier portal. 
All applicants who have paid the tender fee shall have access to the Tender Documents through Nama Water Services e-Tendering page (Supplier Login). All participating companies must submit a Bid Bond of 1% of the bid value in a sealed envelope to The Chairman of the Tender Committee no later than 2:00 PM on the bid submission date. 
The Bid Bond must be obtained from a bank registered in the Sultanate of Oman and should be addressed in favor of Nama Water Services. The bid, along with all required documents, must be uploaded through the Nama Water Services e-Tendering page no later than 2:00 PM on the date specified above. For more information, please refer to the Tender Page on our website www.owwsc.nama.om or email us at tender@owwsc.nama.om or interact in the online tender discussions.

Note to Bidders: Dear Participants, once your offer is ready, please submit your bid offer. Don't wait for the submission deadline date. 
For any questions about the tender or the submission of a bid, please interact with the online discussions or send an email to tender@owwsc.nama.om.


Tender Status

S.NoTender NumberDescriptionEligibilityTender fee(RO) Non-RefundableStatusFloated DateLast Date of PurchaseBid Submission Date More Info.
1T/2715104/2025Consultancy Services for Assessment, Design, and Engineering (Rehabilitation Works of Bausher (B1) Sewer NetworkLocal Companies registered with Projects, Tenders and Local Content Authority and International Companies specialized in the works mentionedRO 500/-(Plus 5% VAT)Floated31-JUL-25 00:00:0007-AUG-25 15:00:0008-SEP-25 14:30:00
2T/2726146/2025Supply and Installation Air Condition Equipment and Facilities Maintenance Services Contract for five yearsLocal Companies registered with Government Tender Board and specialized in the works mentionedRO 1500/-(Plus 5% VAT)Floated12-AUG-25 00:00:0028-AUG-25 15:00:0015-SEP-25 16:00:00
3T/2719126/2025Consultancy Services for Design and Supervision for Lima Wastewater Network System and STPLocal Companies registered with Projects, Tenders and Local Content Authority and International Companies specialized in the works mentionedRO 100/-(Plus 5% VAT)Floated03-JUL-25 00:00:0017-JUL-25 15:00:0008-SEP-25 15:00:00
4T/2719125/2025Consultancy Services for Design & Supervision of Water Networks in Saham & Al Khabourah Wilayats (phase 1)Local Companies registered with Projects, Tenders and Local Content Authority and International Companies specialized in the works mentionedRO 1500/-(Plus 5% VAT)Floated03-JUL-25 00:00:0017-JUL-25 15:00:0008-SEP-25 15:00:00
5T/2724156/2025Design, Supply & Installation of Grab Screen System at Central Pumping Station CPSLocal Companies registered with Government Tender Board in Excellent Grade and International Companies specialized in the works mentionedRO 50/-(Plus 5% VAT)Floated03-AUG-25 00:00:0007-AUG-25 15:00:0001-SEP-25 14:30:00
6T/2724155/2025Transporting 227m3 / daily of water from the TFS Al-Jarda in Al-Madhabi to the TFS ALRahba in Bidbid from 31 dec 2025 to 31 dec 2027Local Companies registered with Government Tender Board and specialized in the works mentionedRO 50/-(Plus 5% VAT)Floated17-AUG-25 00:00:0028-AUG-25 15:00:0015-SEP-25 15:00:00
7T/2724143/2025Construction Of Ruwi Sewer Network ProjectLocal Companies registered with Government Tender Board and International Companies specialized in the works mentionedRO 2500/-(Plus 5% VAT)Floated03-AUG-25 00:00:0014-AUG-25 15:00:0008-SEP-25 11:15:43
8T/2719118/2025Supply, Installation & Commissioning of Penstocks with the Actuator at Al Khoud TE StationLocal Companies Registered with Government Tender Board and specialized. in the works mentionedRO 50/-(Plus 5% VAT)Floated03-JUL-25 00:00:0017-JUL-25 15:00:0001-SEP-25 14:00:00
9T/2724141/2025Consultancy Services for Quantity Surveying West Cluster North & South Batinah, Buraimi, MusandamLocal Companies registered with Projects, Tenders and Local Content Authority and International Companies specialized in the works mentionedRO 1500/-(Plus 5% VAT)Floated19-AUG-25 00:00:0001-SEP-25 15:00:0029-SEP-25 15:00:00
10T/2724140/2025Consultancy Services for Quantity Surveying Central cluster- Dakhiliyah, Dhahirah & WustaLocal Companies registered with Projects, Tenders and Local Content Authority and International Companies specialized in the works mentionedRO 1500/-(Plus 5% VAT)Floated19-AUG-25 00:00:0001-SEP-25 15:00:0029-SEP-25 15:00:00
11T/2724139/2025Consultancy Services for Quantity Surveying Muscat, South & North SharqiyahLocal Companies registered with Projects, Tenders and Local Content Authority and International Companies specialized in the works mentionedRO 1500/-(Plus 5% VAT)Floated19-AUG-25 00:00:0001-SEP-25 15:00:0029-SEP-25 15:00:00
12T/2724138/2025Construction of Sewer connection for Al Bandar Mixed development project in Al-Mawaleh area in Seeb WilayatLocal Companies registered with Projects, Tenders and Local Content Authority and specialized in the works mentionedRO 500/-(Plus 5% VAT)Floated30-JUL-25 00:00:0007-AUG-25 15:00:0008-SEP-25 14:00:00
13T/2719116/2025Consultancy Services for Design & Construction Supervision of Water Networks in As Suwaiq WilayatLocal Companies registered with Government Tender Board and International Companies specialized in the works mentionedRO 500/-(Plus 5% VAT)Floated26-JUN-25 00:00:0010-JUL-25 15:00:0001-SEP-25 15:00:00
14T/2719114/2025CONSTRUCTION OF WATER DISTRIBUTION NETWORK TO SEEB WILAYAT PACKAGE 3 (PHASE 2)Local Companies registered with Government Tender Board in Excellent Grade and International Companies specialized in the works mentionedRO 2500/-(Plus 5% VAT)Floated06-JUL-25 00:00:0014-JUL-25 15:00:0025-AUG-25 15:00:00
15T/2719110/2025Consultancy Services for Design and Supervision for STP, Sewer & TE Network System in IbriLocal Companies registered with Government Tender Board and International Companies specialized in the works mentioned.RO 1500/-(Plus 5% VAT)Floated26-JUN-25 00:00:0010-JUL-25 15:00:0001-SEP-25 14:00:00
16T/2729158/2025Construction Services (Design, Build and Finance) for a Pilot of Aquifer storage and recovery (ASR) scheme in Jaalan Well Field.Local Companies registered with Government Tender Board in Excellent Grade and International Companies specialized in the works mentionedRO 2500/-(Plus 5% VAT)Floated21-AUG-25 00:00:0001-SEP-25 15:00:0029-SEP-25 14:00:00
17T/2719105/2025Maintenance of waste water process tanks and filters cleaning in Muscat governorate.Local Companies registered with Government Tender Board and specialized in the works mentionedRO 1500/-(Plus 5% VAT)Floated03-JUL-25 00:00:0017-JUL-25 15:00:0001-SEP-25 16:00:00
18T/2719104/2025Consultancy Services for Design and Supervision for Construction of Water Distribution Networks at Barka WilayatLocal Companies registered with Government Tender Board and International Companies specialized in the works mentionedRO 1500/-(Plus 5% VAT)Floated26-JUN-25 00:00:0010-JUL-25 15:00:0001-SEP-25 14:30:00
19T/2729152/2025Construction of Sur Water Transmission PipelinesLocal Companies registered with Projects,Tenders &Local Content Authority asExcellent Grade &International Companies specialized in works mentionedRO 2500/-(Plus 5% VAT)Floated21-AUG-25 00:00:0001-SEP-25 15:00:0029-SEP-25 03:00:00
20T/2693091-2/2025Consultancy Services for the HSE Management Support in the Capital Projects Delivery Division of Nama Water Services (OWWSC), Projects (C), Muscat, South & North SharqiyahLocal Companies Registered with Government Tender Board and International Companies Specialized in the Works MentionedRO 500/-(Plus 5% VAT)Floated19-AUG-25 00:00:0026-AUG-25 15:00:0022-SEP-25 15:00:00
21T/2729144/2025Comprehensive Cybersecurity Assessment and Standards Development for Water Smart Meters.Local Companies registered with Projects, Tenders and Local Content Authority and International Companies specialized in the works mentionedRO 50/-(Plus 5% VAT)Floated19-AUG-25 00:00:0001-SEP-25 15:00:0029-SEP-25 14:00:00
22T/2720134/2025Construction of New DMAs in Wilayat Sohar- Al Batinah NorthLocal Companies registered with Government Tender Board specialized in the works mentionedRO 100/-(Plus 5% VAT)Floated30-JUL-25 00:00:0007-AUG-25 15:00:0008-SEP-25 14:30:00
23T/2728154/2025Implementation of Endpoint Security Protection for SCADA With Annual Maintenance for Three Years.Local Companies registered with Government Tender Board and specialized in the works mentionedRO 50/-(Plus 5% VAT)Floated14-AUG-25 00:00:0028-AUG-25 15:00:0015-SEP-25 16:00:00
24T/2728152/2025Rehabilitation of Biological Treatment Units at A’Seeb STPLocal Companies registered with Projects, Tenders and Local Content Authority and specialized in the works mentionedRO 500/-(Plus 5% VAT)Floated18-AUG-25 00:00:0028-AUG-25 15:00:0022-SEP-25 14:30:00
25T/2728149/2025Consultancy for Establishing a Revenue Assurance Department and the Working Framework associated to itInternational and Local Companies registered with Government Tender Board in First Category and International Companies that have sufficient experiencRO 50/-(Plus 5% VAT)Floated12-AUG-25 00:00:0028-AUG-25 15:00:0015-SEP-25 14:30:00