Notices of this kind (United Kingdom, open procedure, above the EU threshold) give a median of 30 days, half of them between 26 and 35 days, based on 1,727 notices of the last two years.
DCWW2115 Service Reservoir Cleaning, Maintenance and Refurbishment CoP
Buyer: Dwr Cymru Cyfyngedig
Country: United Kingdom
Deadline: 2 Nov 2026, 23:59 (UTC)
Estimated value: €30,099,150
Procedure: Open procedure
Sector (CPV): Environment, sewage & cleaning (90913000)
Aperlena: https://aperlena.com/en/t/dcww2115-service-reservoir-cleaning-maintenance-and-refurbishment-cop-aa7f2a2310
Official notice: https://www.find-tender.service.gov.uk/Notice/094342-2026
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01
Summary
Machine-generated summary
DCC intends to award a framework agreement for the cleaning, maintenance and refurbishment of service reservoirs across its operational area. The framework covers around 828 potable water tanks, mostly underground concrete structures, plus steel tanks, towers and above-ground assets, which need routine cleaning and inspection under PNL 810 to meet Drinking Water Inspectorate regulations. Services include cleaning and disinfection using high-pressure water, soft brushes and DWI-approved disinfectants or chemicals, supporting safe return to operation and water quality compliance. The initial term is 3 years, extendable by 2 + 2 + 1 years, with an estimated value of £25.5 million for the initial term and £68 million over the maximum 8 years, at about £8.5 million per year.
02
Description
Overview And Objectives
DCC intends to award a Framework Agreement for Service Reservoir Cleaning, Maintenance and Refurbishment services. It is a business-critical service required to:
• maintain the cleanliness, integrity and operational condition of DCC’s potable water storage assets;
• support the safe and timely return of service reservoirs to operation following planned cleaning, inspection and minor remedial works; and
• support compliance with Drinking Water Inspectorate (DWI) requirements, DCC’s internal standards and applicable water quality legislation.
The Framework will be used to provide cleaning and maintenance for potable water tanks across DCC’s operational area. There are approximately 828 tanks within DCC’s estate that require routine cleaning and inspection in accordance with PNL 810 (DCC’s internal standard for drain downs and cleaning of service reservoirs) to meet Drinking Water Inspectorate (DWI) regulations.
Tanks include below ground and above ground steel or concrete tanks as well as a small number of water towers however most tanks are square, underground concrete structures.
Ensuring a clean and consistent water supply is core to DCC services and is linked directly to corporate key performance indicators.
The proposed contract term is 3 years, with the option to extend for a further 5 years (2 + 2 + 1 years). The estimated value of the framework for the initial three-year term is £25.5 million based on estimated annual expenditure of approximately £8.5 million. The value across the maximum term of 8 years is £68m.
Scope
The scope includes the following elements:
Cleaning
This includes the cleaning and disinfecting of the tanks normally with the use of high-pressure water or soft brush as appropriate and DWI Approved disinfectant. In some instances, it may be a requirement to carry out chemical cleaning with the use of a DWI approved chemical.
The tasks to be carried out will include:
• Cleaning and disinfection of potable water storage tanks using appropriate methods and DWI-approved products
• Inspection of service reservoirs as part of cleaning activities
Maintenance
Maintenance activities are usually identified at the time of cleaning by the Supplier and instructed by DCC to enable the tanks to be safely returned to service. These tend to be internal and external works for concrete repairs and coatings, internal and external steel repairs, membrane fitting and repairs, replacement of ladders and pipework, joint repairs, external earthworks repairs and joint repairs. Emergency reactive repairs to concrete/ pipework / liner etc. may also be required on occasion. These works will exclude any work that involves significant engineering difficulties such as:
• Any structural modifications to the tank(s);
• Any works on the embankments surrounding the tank(s);
• Any modifications to the pipework that can influence the hydraulic performance of the tank(s);
• Any works that alters the operating capacity of the tanks;
• Any works that constitutes the appointment of a Panel Engineer under the Reservoirs Act.
The tasks to be carried out will include:
• Minor planned and reactive remedial works, including concrete and steel repairs, coatings, membranes, ladders, pipework, joints and external earthworks.
• Emergency reactive repairs where required.
• Activities necessary to support the safe return of reservoirs to service.
The Framework Agreement will be procured as a single Lot, with two Suppliers appointed to the Framework.
03
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Documents in English.
Official source
Source: Find a Tender Service (UK Cabinet Office / Crown Commercial Service)
The buyer has too few awards of its own in this sector, so this is the range of the last 171 awards for Environment, sewage & cleaning in United Kingdom.
€1€117.2M
This notice
€30.1M
Median award
€186,319
Middle half of past awards
€73,277 to €707,204
The estimate is larger than three in four past awards.
Award values as published by the official sources. Use them as a guide, not a rule: scope, lots and duration differ between contracts.
Larger than 96% of the open notices in Environment, sewage & cleaning across Europe.
smallestlargest
open now in Environment, sewage & cleaning
6,121
median open notice
€351,939
Who wins in this market
Many suppliers
United Kingdom · Environment, sewage & cleaning
different companies won awards here
184
of the awards went to the three most frequent winners
7%
buyers awarded contracts here
151
Based on 233 awards with a named winner over the last 3 years. Counted by award, not by value, because lot and framework amounts are not comparable.
Concentrated means the three most frequent winners took 65% or more of the awards; many suppliers, under 35% with at least ten different winners.