Operations & Support

    Water Treatment O&M Companies

    Operations & maintenance contractors running water and wastewater assets under performance-based agreements.

    201 providers

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    Showing 61-80 of 201

    201 results from 201 matched providers

    Lynwood Civil Engineering Ltd logo

    Lynwood Civil Engineering Ltd

    United Kingdom

    Lynwood Civil Engineering is a leading water utilities & civil engineering company established over 20 years. Our head office is based in Bristol, providing services across the South West, South Wales & the Thames Valley to support our diverse range of clients across water utilities, local authorities, commercial and domestic customers. We take great pride in being highly knowledgeable experts within our field, and continually invest in our people, processes, plant and vehicles so that we can provide the highest possible standard of service. Our focus on water utilities has seen us build a wastewater and potable business which provides a range of services in repair and maintenance, both reactive and planned works as well as delivering water infrastructure schemes with deep dig expertise. Company Ethos As an established family run organisation, we maintain our core family values between our people, clients, suppliers, and the communities around us. Our streamlined organisational structure, combined with the experience of our Company Directors and other long-standing employees, has enabled the company to grow into an agile organisation that manages client relationships across multiple frameworks, contracts & projects. Health & Safety Health and safety has always been at the forefront of how we run our business. Whilst it is an integral part of working in our industry, we take pride in ensuring that health & safety is embedded in our culture. Quality & Assurance We operate as a people first business by investing in our workforce to ensure our teams have the support and qualifications required to exceed our clients’ expectations. We offer extensive development opportunities that enable our employees to grow with our business.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    R2M Limited logo

    R2M Limited

    United Kingdom

    At R2M, we are driven by a passion for creating innovative solutions that help build a smarter, more resilient water industry. Our mission is to deliver effective, high-quality products and services to UK water utilities and contractors, continually striving to enhance the nation's water supply for future generations. Founded in 2003 as a supplier of pipes and fittings, R2M quickly earned a reputation for reliability through our extensive product range and robust stock levels—ensuring our customers always had what they needed, when they needed it. Over the years, we have evolved from a trusted supplier into a comprehensive manufacturer and installer too. Today, we offer end-to-end solutions—all under one roof—streamlining the process for our customers and providing exceptional value at every stage. We are proud to be used trusted by all water utilities and contractors across the UK. Since 2019, R2M has proudly been a member of the Hawle Austria Group—a global network of like-minded, quality-focused companies including the likes of Hawle Austria, Erhard, Nova Siria, and Özkan. This partnership gives us exclusive access to a wide portfolio of innovative and proven products from across the group, allowing us to offer tailored solutions that meet the evolving needs of our customers. Being a part of this established and experienced group strengthens our capabilities, expands our product range, and ensures we stay at the forefront of the industry—so our customers always benefit from world-class technologies backed by local expertise. Are you ready to discover how our solutions can support your next project? Get in touch with us today on 01282 778 030.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    Total Automation & Power logo

    Total Automation & Power

    United Kingdom

    Total Automation & Power (TAP) is a formal joint venture between Cougar Automation Ltd and Technical Control Systems Ltd. Formed in 2005, it has delivered hundreds of projects worth tens of millions of pounds. Current water and wastewater frameworks include Severn Trent, Thames, Welsh & Yorkshire Water. Working with TAP is just like working with a single company. Every project has a dedicated project manager who coordinates all the work and gives you a single point of contact. You place a single order for all of your electrical and control system design, supply and installation so you can concentrate on delivering your project without having to worry about placing and managing separate orders for MCCs, a control system and electrical installation. Unlike separate orders, both companies stand behind the whole scope and unlike a contract/sub-contract arrangement we don’t mark up each other’s price. Projects are easy to manage, secure and competitively priced. Supporting clients from initial concept design stage through to on-site commissioning, TAP collaborates with clients at every stage to evaluate designs to optimise TOTEX outcomes. When you choose TAP as your partner you get an unrivalled combination of expertise: Control System, SCADA & PLC expertise from Cougar Automation in six regional offices throughout the UK. MCC, low voltage assembly and panel expertise from Technical Control Systems’ manufacturing facility in Leeds.

    Networks - Sewerage
    Asset Maintenance & Rehabilitation
    Veolia Water Technologies UK logo

    Veolia Water Technologies UK

    United Kingdom

    Veolia Water Technologies (VWT) provides an unrivalled combination of capabilities in the UK for the treatment of water, wastewater, sludge and odour. VWT provide turnkey solutions from feasibility studies, design and build and supply and installation of packaged treatment solutions, through to the extension or refurbishment of existing water and wastewater facilities. The company’s investment in Research & Development focuses on developing the most innovative solutions for its municipal and industrial clients, while at the same time considering the environmental challenges being faced. VWT’s goal is to develop sustainable and technologically superior solutions that balance the demand for efficient and cost effective technology whilst protecting the environment by looking at energy consumption, carbon emissions, odour pollution and safe guarding water quality. With over 125 years of experience in the UK, VWT is able to draw upon an unsurpassed knowledge of traditional and innovative solutions in order to meet the demands of both industrial and municipal clients. Performance is measured by the global satisfaction of VWT’s customers. Their technical creativity is reflected by a prestigious track record of extensive references in the UK and across the world supported by operational experience. A partnership with VWT provides the unique benefits of technical excellence, innovation, reliability and a trusted partnership. VWT offers a range of proprietary technology for applications to treat Drinking Water, Wastewater, Sludge Treatment, Odour Treatment and Industrial Effluents.

    Treatment Works Products/Services
    Asset Maintenance & Rehabilitation
    A-Consult Ltd logo

    A-Consult Ltd

    United Kingdom

    A-Consult specialise in providing solutions for the storage and handling of liquids in the agricultural, water industries and industrial sectors. Established in 1986 we have successfully constructed over 10,000 tanks throughout the United Kingdom and Europe. Aqua-Tank provides a safe, cost effective method of containment with numerous applications within the water, waste and industrial sectors. Guaranteed factory-controlled quality combined with a robust structure along with tried and tested design principles, offer life expectancy previously only achieved with cast in situ installations. A-Consult are the market leaders in the design, manufacture and installation of precast concrete storage tanks. SETTLEMENT TANKS Settlement tanks can be supplied with either an integrated concrete coping top which supports the travel of either a full or half bridge scraper. Tank sizes range from 4.0m diameter to greater than 50.0m, designed to allow backfilling, enabling access to M&E equipment such as scraper bridge, motor and travelling wheels. Incorporating the patented EPDM jointing seals, the post tensioned settlement tanks can be designed to accommodate pipe work entries through the precast wall panels. Design and constructed to BS8110 and BS8007 and compliant to all relevant Euro Codes. FILTER TANKS The A-Consult tank system has been used to construct many types of filter tanks. The tanks can be designed as water retaining structures if necessary, with letter box opens to facilitate the trickling filtration systems. PROCESS TANKS In such a volume related sector the A-Consult precast concrete tank system offers extensive flexibility in both tank diameters and wall heights. Diameters start at 4m and increase in increments of approximately 350mm, wall heights start at 2m and increase in increments of 100mm topping out at 12m. STORAGE TANKS A-Consult tanks have been used for the storage of many different materials on both wastewater treatment plants along with sewage treatment plants. All materials used in the construction of our tanks are DWI or WRAS approved allowing the storage of potable water. LEACHATE TANKS With a 50-year design life the A-Consult precast concrete tank system offers a cost effective and robust solution to many process and storage applications.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    Atom Fabs Ltd logo

    Atom Fabs Ltd

    United Kingdom

    Here at Atom Fabs we offer design, manufacture, supply and installation. Our scope of work includes pipework, sluice gates, platforms, hand railing, ships ladders and gratings. We have BS EN 1090 EXC 2 – CE Marking accreditation and we are in the process of gaining ISO9001-ISO14001. We are Safe Contractor Approved and EHEDG Certified. All our site teams are Confined Space & IPAF trained. Areas of expertise include: Welding: We have a team of highly qualified and experienced MIG and TIG welders able to take on any type of project. Waterjet cutting: Our Waterjet cutter has a 3000 x 1500 cutting bed and the flexibility to cut any flat patterns up to 200mm thick in various different materials. Folding: Our Amada press brake can fold up to 5mm stainless steel, mild steel and aluminium sheet in 3 metre lengths. Design: With the latest 3D software, we will work with you to produce a full suite of final product designs before manufacture. 3D Scanning: Our 3D scanning services are offered as a fast & accurate way of digitising physical objects for use in design, inspection and visualisation. The use of our 3D scanner can be applied to almost any product or structure to accurately capture the physical shape and dimensions.

    Reservoirs - Treated Water
    Asset Maintenance & Rehabilitation
    Siltbuster Group logo

    Siltbuster Group

    United Kingdom

    Established for over 20 years, the Siltbuster Limited provides rapidly deployable, “modular off the shelf” water treatment solutions to the construction, industrial and municipal markets, with a client base ranging from the world’s most recognisable multi-national corporations to small enterprises. Siltbuster provides a wide range of water and wastewater treatment equipment for the industrial and municipal markets, including: Packaged lamella dissolved air flotation (DAF) units. Lamella clarifiers. Packaged biological treatment systems. Oil/water separators. Pipe flocculators. Reaction tanks. Containerised dosing systems. In the UK, Siltbuster has pioneered the concept of offering this plant through our extensive hire fleet. Approximately 20 major contracts and circa 50 smaller projects are undertaken each year for a diverse range of clients, many of which are some of the UK’s best-known companies. In addition to the industrial/municipal sector, Siltbuster has undertaken a number of mine water treatment projects in many countries, for example, the UK, Ireland, Greece, France, USA, Canada, Australia and Slovakia. The Siltbuster team pride themselves in their ability to react rapidly and in compliance with the project constraints, delivering mobile or permanent solutions tailored to meet your individual needs.

    Treatment Process Technologies
    Asset Maintenance & Rehabilitation
    Amiblu UK LTD logo

    Amiblu UK LTD

    United Kingdom

    If you knew there was a material out there with a proven track record worldwide for outperforming others, would you want to know more about it? Using cutting edge technology to meet the toughest challenges, Amiblu manufactures GRP pipelines and storage systems that last for generations and do not corrode. GRP is a resilient, composite material utilised in many aspects of construction and civil engineering to deliver long lasting infrastructure. The history of Amiblu’s GRP systems starts with the first production of centrifugal cast (CC) pipes in Basel in 1957 and continuous filament wound (FW) pipes in 1969 in Norway using top quality raw materials combined with glass fibres to create robust pipes and storage solutions. Over the past 60+ years, research and development, growth and investment now puts Amiblu at the forefront of GRP pipe production, with seven state of the art manufacturing facilities and a global network of licensed partners producing the two market leading names in GRP pipes – Flowtite (FW) and Hobas (CC). Amiblu takes environmental responsibility very seriously by developing systems that offer a number of benefits to asset owners who are faced with aging networks, growing cities, climate change and increases in demand. Challenging traditional materials, our products are corrosion and abrasion resistant, with excellent hydraulics, can be bespoke made to meet project requirements, are low-maintenance and engineered for 150 years’ service life. Products are manufactured for: Sewage & stormwater Hydropower Circular & non-circular pipeline rehabilitation Potable & raw water delivery Industrial processes Micro-tunnelling applications. The greenest product is the one you don’t have to replace.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    Cobra Hydro UK Ltd logo

    Cobra Hydro UK Ltd

    United Kingdom

    Specialists In odour control and dust suppression Cobra Hydro UK is a fast-expanding company for the design, manufacture and installation of odour control systems, sludge dosing applications and dust suppression requirements across the United Kingdom and most recently, internationally. We are a family-owned business, designing and manufacturing all our equipment and blending our neutralisers. We have been providing odour control and dust suppression solutions for over 20 years. Protecting the environment is always at the forefront of our minds. We therefore use environmentally friendly products such as Atom Neutraliser, which is used not only for odour control equipment, but also in the food industry. Cobra Hydro UK has designed a waterless odour control system that works with vapour instead of water. This gives customers a water saving option. At Cobra Hydro UK, we are always striving for new innovative ways to protect the environment. Cobra Hydro UK employs qualified personnel for the manufacture and installation of equipment. All equipment is produced in house and made to a high standard. We carry out full site surveys and consult with the client at every stage of the process to ensure all requirements have been met. If required, we can also design one-off units to meet the client’s specific criteria.

    Treatment Works Products/Services
    Asset Maintenance & Rehabilitation
    Technocover Ltd logo

    Technocover Ltd

    United Kingdom

    Technocover is an approved ISO 14001:2004 Environmental and ISO 9001:2008 Quality Accredited Company, dedicated to the Design, Manufacture, Installation and Maintenance of Physical Security Access Solutions for protection to all industrial sectors. Our extensive in-house design and manufacturing facilities are home to well established research and development unit and comprehensive testing facility. Our commercial offices incorporate our design team who utilise the latest computer aided design technology and work alongside our dedicated planning section who oversee everything from surveying, scheduling and contract reviews, to the management of framework agreements. We have been designing and manufacturing innovative steel products since 1993. In that time, through organic growth, planned expansion and acquisition, we have gained a reputation as the UK’s leading supplier of Physical Steel Security Access Products. We have a range of aperture security solutions for virtually every application, establishments in the UK and overseas have sought our expertise in providing security products for asset protection. We operate a Total Service Philosophy and can handle complete projects from site survey to final installation, whether for new or refurbishing projects, the adaptability of our galvanised steel access products means the most complex design criteria can be met. Our range of high quality access products offer custom built operational and security solutions to prevent unauthorised persons gaining access, securing key assets against all levels of trespass, malicious vandalism, theft, extortion, contamination or terrorism. Many of our access system products have been tested and approved by the Loss Prevention Certification Board (LPCB)  to LPS 1175 issue 5 or above, Security Rating Levels 2, 3, 4 or 5. Frameworks We hold both exclusive and shared framework agreements with most of the major UK water companies. Framework Security items include: LPCB Level 2 Universal Gas Cylinder Clamps LPCB Level 3 Mesh Cage Systems LPCB Level 3 Flush Access Covers LPCB Level 4 Upstand Access Covers LPCB Level 4 Padlockable Access Doors LPCB Level 4 Key Entry Doors LPCB Level 4 Enclosures/Kiosks/Cabinets LPCB Level 4 Walk-In Modular Buildings LPCB Level 4 Window Bar Sets LPCB Level 5 Louvres

    Security Solutions
    Asset Maintenance & Rehabilitation
    Tracey Concrete logo

    Tracey Concrete

    United Kingdom

    Tracey Concrete is one of the largest precast concrete manufacturers in the UK and Ireland. With our extensive range of top quality products we offer competitive and reliable solutions to meet all of our customer’s needs. Our success has been built on the consistent quality of our products, efficient delivery and outstanding customer service. With our vast experience and expertise in the construction industry we have been able to supply some of the biggest projects in the UK and Ireland. Our products have achieved all necessary certifications and are accredited with the most up to date British and European standards, with the relevant products being BSI kitemarked and CE marked. Through extensive research our technical team is always looking for the most advanced innovations in the industry and work closely with our customers to provide any project designs required. We are always environmentally conscious in the manufacturing and delivery process. We are committed to ensuring all of our products provide the economic benefits required for sustainable construction.

    Pipeline & Pipework Products
    Asset Maintenance & Rehabilitation
    AJ Engineering & Construction Services Ltd logo

    AJ Engineering & Construction Services Ltd

    United Kingdom

    AJ Engineering & Construction Services Ltd provide a wide spectrum of engineering services ranging from steel fabrication and CNC machining to cladding and civil engineering, with our highly experienced team we provide on-time, on-budget quality solutions. From our bases in Forres and Fort William, and a team accustomed to travel we can meet our client’s needs wherever required. Having worked on various water and wastewater treatment projects for the past 25 years we have developed a great working relationship with water companies across the UK. Our in-house capabilities allow us to offer a turnkey service to our clients from reactive maintenance and manufacturing to planned infrastructure and non-infrastructure projects. Many of the projects we undertake in the water sector are within water treatment and wastewater treatment plants where cleanliness is paramount, all our water sector site teams hold certification and Water Hygiene cards. Our range of services collated into one means that we can take on multiple discipline contracts and deliver them as one which provides our clients with a number of advantages. It removes the need to have multiple contractors on site at once. Benefits in cost savings passed down on procuring large amounts of steel for a side wide project. Little risk of dimensional discrepancies between contractors We work alongside framework delivery partners throughout the UK providing the services below; Steel portal frame buildings (design, fabrication, erection & cladding) Design, manufacture and installation of pipe bridges Design, manufacture and installation of site wide access metalwork (walkways, access stairs, ladders etc) Design, manufacture and installation of modular water buildings transportable by road. Design of various process tanks, pipework and pumps. Fabrication of tanks and pipework (stainless and carbon) Mechanical Installation Modular Treatment Buildings and Mechanical Fit-out SR2 rated steel enclosures (quicker than GRP Kiosks) We appreciate how important quality and cleanliness is in the water sector and we are proud that we have completely segregated facilities for stainless steel and carbon steel. In addition to this we are also approved under the regulations 31(4)(A) of the water supply regulations 2016 to supply stainless steel and pipework fabrications to the drinking water sector.

    Networks - Sewerage
    Asset Maintenance & Rehabilitation
    Anglian Water’s @one Alliance logo

    Anglian Water’s @one Alliance

    United Kingdom

    Anglian Water's Integrated Main Works Delivery Programme Anglian Water’s @one Alliance is an integral part of the Anglian Water ecosystem, delivering complex projects across the Water and Water Recycling network. Comprising 8 industry-leading organisations, each contributing specialised expertise, @one efficiently manages over 40% of Anglian Water’s capital delivery programme. Our partners are Anglian Water Asset Delivery, Balfour Beatty, Barhale, Binnies, Mott MacDonald Bentley (MMB), Sweco, Skanska and MWH Treatment. Employees in the @one Alliance are employed across all our partner companies and work together to deliver complex programmes of work. Following the successful delivery of £1.2bn during AMP7, the @one Alliance is now set to deliver approximately £3bn of vital work as part of Anglian Water’s £11bn AMP8 business plan, covering around 750 projects over the next five years. Since our establishment in 2005, @one has grown to a team of over 1,600 employees. And with plans to welcome an additional 300-500 new team members over the next 12-18 months, the Alliance is set to expand even further. If this interests you, then take a look at our jobs page to see the options available to you!

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    AVK UK Ltd logo

    AVK UK Ltd

    United Kingdom

    AVK UK is part of the globally renowned AVK Group who are based in over 100+ countries and has over 4,500+ employees worldwide. The AVK Group is privately owned by the founder Niels Aage Kjaer, and is named after his father Aage Valdemar Kjaer. As part of the AVK Group, we pride ourselves in being one of the leading valve manufacturers for the water, sewage, firefighting, and gas industries. Our product program comprises a large range of valves, hydrants, pipe fittings and accessories, each complying with the highest standards of safety and durability. Our focus is on the products designed and manufactured to the British Standards, however, the AVK Group today offers products in accordance with the most national and international standards. Our product portfolio also includes AVK Smart Water Management valves and sensors for real-time network information and status. We also offer Pressure Management solutions such as air valves, PRVs, and control valves, AVK Assist which enables GPS product location and, the market leading Donkin PUR range of gas valves. Our UK sales offices and manufacturing sites respond quickly to the needs of our customers and for fittings required on an express or emergency service we have a dedicated same day 24/7 helpline – 0800 202 8228. In addition, we cooperate with local and national distributor partners to offer our customers AVK products as part of multi-product packages. AVK UK is the sales division and has offices in Staveley, near Chesterfield, also known as the home of Bryan Donkin gas valves, and Northampton. AVK in the UK comprises of 7 companies and has over 500 employees. Find out more here: https://www.avkuk.co.uk/en-gb/solutions-and-information/about/avk-in-the-uk/avk-uk

    Treatment Works Products/Services
    Asset Maintenance & Rehabilitation
    Barhale logo

    Barhale

    United Kingdom

    Barhale is a civil engineering and infrastructure specialist with more than 40 years’ experience in the construction industry. Founded by chairman, Dennis Curran in 1980, the group was originally set up as a tunnelling contractor. While retaining its tunnelling roots, repeated success across several sectors of the construction industry has enabled the company to expand to become one of the largest privately-owned infrastructure experts in the UK. We work UK-wide across the water, energy, transport and built environment sectors providing design, construction and maintenance services under long-term contracts with blue chip public, regulated and private clients. The company has an outstanding reputation for the range of specialist skills it possesses to support its civil engineering and infrastructure activities including MEICA and a steel-fabrication and supply subsidiary.

    Networks - Water Supply
    Asset Maintenance & Rehabilitation
    Headlight AI Limited logo

    Headlight AI Limited

    United Kingdom

    Headlight AI is a UK based technology company developing sensing, mapping, and inspection solutions for extreme environments. The company works primarily with Utility companies and contractors to provide condition assessment and geo-location data in subterranean locations, especially for large diameter assets (such as sewers, culverts, and tunnels with diameters >900mm), with a focus on autonomous or semi-autonomous systems that avoid the need for person-entry (in particular NC3 or NC4 confined space entry), improving workers’ health and safety. The company supplies its award winning product, Telesto, to utility companies and contractors in order for them to collect multi-sensor data, including LiDAR, on either robotic or floating platforms. The data is then processed to account for the motion of the system and to produce 3D point cloud and multi-image data for further analysis. Users can access the information via the web-based Telesto application, which provides condition assessment dashboards and statistics relevant to the asset, achieved using novel artificial intelligence (AI) models. The company currently has several other products and features in development to further assist with underground inspections and surveys, and provide new ways to navigate and locate in GPS-denied and extreme environments.

    Smart Water
    Asset Maintenance & Rehabilitation

    Water and Wastewater Operation and Maintenance Services: Contract Models, KPIs, and Asset Performance

    Operation and Maintenance (O&M) services for water and wastewater treatment facilities span routine operations (process control, chemical dosing, sampling, data recording), planned preventive maintenance (PPM: servicing pumps, valves, instruments, and rotating equipment on schedule), reactive maintenance (breakdown response, emergency repair), and performance management (KPI monitoring, regulatory compliance reporting, asset condition tracking). O&M contract models range from in-house operation (utility employs its own operations and maintenance staff) through managed service (external contractor provides staff and manages O&M under performance contract) to full design-build-operate-transfer (DBOT: contractor designs, builds, and operates for a concession period of 15 to 25 years before handback).

    PPM programmes for water treatment assets are structured around equipment criticality and manufacturer recommendations. Pumps: oil/grease lubrication quarterly, mechanical seal inspection 6-monthly, vibration analysis 6-monthly (predictive maintenance trigger: vibration velocity above 4.5 mm per s RMS per ISO 10816-3 Class III), impeller inspection and clearance check annually. Blowers and compressors: oil change 3 to 6-monthly, air filter replacement 3-monthly, belt tension check monthly (V-belt tension tolerance plus or minus 5 percent). UV systems: lamp intensity check weekly, sleeve cleaning monthly, lamp replacement at intensity below 70 percent of new-lamp value (typically 12 to 24-month lamp life). Membrane systems: CEB weekly, CIP quarterly, integrity testing daily or monthly per regulatory requirement.

    O&M contract performance is measured by KPIs aligned with regulatory compliance and customer service. Typical KPIs: treatment process compliance (effluent quality parameters within consent limits, target 99.5 percent compliance), uptime or availability (proportion of time the treatment plant is operational and producing treated water at rated capacity, target above 99 percent for critical infrastructure), response times (PPM completion within schedule: 95 percent on time; reactive maintenance response: critical faults within 2 hours, minor within 24 hours), and unit cost (cost per m3 of water treated, benchmarked against industry database). Performance-based contracts include KPI-linked payment (bonus for outperformance, financial deduction for underperformance), creating incentive alignment between operator and asset owner.

    Frequently Asked Questions

    What does a water treatment O&M contract typically include?

    A comprehensive water treatment O&M contract covers: (1) Routine operations - process monitoring and control (SCADA observation, manual readings every 4 to 8 hours, process adjustments), chemical dosing management (ordering, receiving, dosing pump calibration and setpoint management), statutory sampling and analysis (daily, weekly, monthly per licence and consent conditions); (2) Planned preventive maintenance - all scheduled maintenance activities per PPM schedule (pump services, filter backwashes, instrument calibrations, UV lamp replacements); (3) Reactive maintenance - attending and resolving breakdowns, fault investigations, emergency call-out 24/7; (4) Regulatory compliance management - record keeping, licence reporting, Drinking Water Inspectorate (DWI) or Environment Agency submissions, corrective action when parameters approach limits; (5) Asset management inputs - condition assessments, capex recommendations, lifecycle planning support. Contract duration: 3 to 5 years for managed service; 15 to 25 years for DBO/DBOT.

    What is the difference between PPM and reactive maintenance?

    Planned Preventive Maintenance (PPM) is maintenance carried out on a time-based or condition-based schedule to prevent equipment failure before it occurs: oil changes, seal replacements, filter cleaning, calibration checks, and vibration monitoring conducted at fixed intervals (daily, weekly, monthly, annually) regardless of whether the equipment shows signs of failure. The cost of PPM is predictable and budgeted. Reactive maintenance (corrective maintenance, breakdown maintenance) is carried out in response to an equipment failure or fault: emergency pump repair after bearing failure, UV lamp replacement after unit alarm, valve repair after gland leak. Reactive maintenance costs are unpredictable and often significantly higher than PPM due to emergency contractor call-out rates, expedited spare parts, and production downtime costs. Industry target: PPM should represent 80 percent or more of total maintenance hours; reactive below 20 percent. A well-executed PPM programme reduces reactive maintenance frequency, overall maintenance cost, and unplanned downtime.

    How is O&M cost benchmarked for water utilities?

    O&M cost benchmarking uses: (1) Unit cost metrics - cost per m3 of water produced ($0.15 to $0.60 per m3 for conventional drinking water treatment; $0.30 to $1.20 per m3 for advanced treatment including membranes and UV); cost per population equivalent served per year ($50 to $150 per PE per year for WWTP O&M); (2) Industry database benchmarks - Ofwat cost benchmarking model (UK) uses totex (total expenditure) benchmarking across all 17 regulated companies to identify relative efficiency; NACWA utility benchmarking (US) for wastewater; AWWA benchmarking programme for water; (3) Process-specific benchmarks - aeration energy 0.3 to 0.6 kWh per kg BOD removed (activated sludge); chemical cost $0.05 to $0.20 per m3 for coagulation (surface water); UV energy 0.02 to 0.05 kWh per m3 at 40 mJ per cm2; (4) Labour productivity - staff hours per ML treated per day; automation and remote monitoring reduce staffing requirements by 20 to 40 percent versus manually operated plants.

    What qualifications are required to operate a water treatment plant?

    Operator qualification requirements vary by jurisdiction and plant type. UK: Water Industry Registration Scheme (WIRS) - competency-based registration for drinking water treatment (Level 3 to Level 6 WIRS qualification depending on plant complexity: Level 3 for simple groundwater, Level 6 for multi-stage surface water treatment including membranes and advanced oxidation). Environment Agency requires qualified operators for WWTP discharge permits. US EPA: state-issued drinking water and wastewater treatment operator certification required in all 50 states; grades T1 to T4 for treatment, D1 to D4 for distribution (AWWA certification framework); minimum grade required determined by plant complexity and population served. EU: no harmonised EU requirement; member states set national qualification requirements. Operator training programmes: CIWEM (UK), WaterNZ, AWWA, and state water environment associations provide technical training courses and competency assessments.

    Case Study·Industrial water utility, multi-site O&M contract, Yorkshire
    Challenge

    A chemicals group operating five process water treatment plants across two Yorkshire sites was managing O&M in-house with a team that had accumulated significant tribal knowledge but no documented PPM programme. A CQC audit found 34 percent of planned maintenance overdue, three critical chemical dosing pumps without service records, and one UV system operating below 70 percent lamp intensity without an alarm.

    Approach

    An O&M managed service contract was awarded following a competitive tender. The incoming operator completed an asset condition survey across all five plants within 60 days, loaded all assets into IBM Maximo CMMS, and built a 12-month PPM schedule aligned with manufacturer intervals and BS EN 13306. Critical spare parts were identified and minimum stock levels agreed with the client. A SCADA alarm rationalisation exercise reduced nuisance alarms from 240 per month to 38.

    Outcome

    PPM completion rate reached 97 percent within six months. The three critical dosing pumps were serviced and calibrated; UV lamps were replaced and intensity verified at 100 percent. Total reactive maintenance incidents fell by 58 percent year on year. The client reported zero regulatory compliance failures in the first 24 months of the contract.

    Questions to Ask Shortlisted Providers

    1. 1

      What is the scope boundary between O&M (revenue spend) and capital maintenance (capex), and who authorises capex works?

      An ambiguous capex/opex boundary creates disputes when major repairs are needed; the contract must define decision rights and approval thresholds clearly.

    2. 2

      What CMMS platform will be used and who owns the asset data at contract end?

      Asset data and maintenance history have long-term value; the client should retain data ownership and confirm export rights in the contract.

    3. 3

      What KPIs apply and what are the financial consequences of underperformance against each?

      KPI-linked payment structures vary widely; understanding which KPIs carry financial penalties versus warnings is essential for pricing risk.

    4. 4

      What is the minimum response time for a critical process failure and what is the out-of-hours call-out protocol?

      24/7 cover for critical water treatment assets usually requires a separate standby rota and remote monitoring; the cost of this cover must be explicit in the contract price.

    5. 5

      What regulatory submissions is the O&M operator responsible for and who carries liability for a compliance failure?

      DWI and EA submissions carry legal liability; the contract must clearly allocate responsibility between operator and asset owner for each compliance obligation.

    What Drives Cost in This Category

    Number of assets and plant complexity

    PPM labour hours scale directly with asset count and complexity; a five-plant contract with 200 major assets requires 3 to 5 full-time equivalent operators, dominating the fixed contract cost.

    24/7 standby and response requirement

    Out-of-hours standby cover for critical infrastructure adds 20 to 40 percent to base O&M cost; response time commitments of 2 hours or less require dedicated local standby personnel.

    Chemical supply and management

    Chemical procurement and dosing management can represent 15 to 25 percent of total O&M cost; consolidated purchasing through the operator may reduce unit costs by 5 to 15 percent versus client self-supply.

    Regulatory reporting and laboratory analysis

    Statutory sampling, accredited laboratory analysis, and DWI/EA reporting add 30,000 to 120,000 GBP per year depending on permit complexity and sample frequency.

    Key Regulations & Standards

    Water Industry Registration Scheme (WIRS)

    Competency-based operator registration for drinking water treatment; Level 3 to Level 6 qualifications required depending on plant complexity; all operators at regulated water company sites must hold appropriate WIRS registration.

    DWI Regulation 28 (WS(WQ)R 2016)

    Requires water companies to notify DWI of failures against prescribed concentrations or values; the O&M operator must have documented escalation procedures to trigger notification within the required timescales.

    EA Environmental Permit (Operator Competency)

    Environmental permits require the operator of a regulated site to demonstrate sufficient competency; the O&M contractor assumes the operator role and must meet the technical competency conditions of the permit.

    BS EN 13306:2017 (Maintenance Terminology)

    Provides standardised definitions for PPM, corrective maintenance, condition-based maintenance, and reliability-centred maintenance used in O&M contracts; alignment with this standard avoids scope disputes.