Market engagement for STW/HD Mobile Plant and Tool in the following areas:
- Hire
- Purchase
- Service, Maintenance and Repair
Please complete the Microsoft form available under 'Engagement process description'
Supply (including design, assembly, supply, delivery and co-commissioning) of an integral modular primary and secondary treatment system(s) to be implemented as sidestream solutions at multiple sewage treatment works (STWs) across AMP8.
Severn Trent Water requires integral solutions - primary settlement, biozone/ biological treatment and humus/ final settlement - all to be contained within a singular modular 'roll on roll off' unit - with lifting points for cranage where required.
Potential for a limited number of alternative configuration units may be required depending on site requirements - e.g.) biozone only, biozone + humus settlement zone, primary settlement + biozone.
The units required are to be deployed at small to medium size treatment works. With the aim being to install an independent side stream to increase the treatment capacity. Allowing for an increase of Flow to Full Treatment (FFT). The flow will be proportionally distributed between the existing assets and modular sidestreams based upon the maximum treatment flow.
• Solution can be either SAF or MBBR
• Automated sludge removal is to be provided from the humus and primary zones.
• Adjusted aeration is to be provided to the biological treatment zone, to allow for optimisation and scouring (as required).
• Lamella units are not a preferred settlement process (for primary or humus), due to previous operational issues requiring excessive operational intervention.
Service, Maintenance and Repair of Analytical Monitoring Equipment associated with drinking water and sewage treatment. STW and HD has a multiple OEM installed asset base, which includes but is not limited to ABB, bNovate, Endress & Hauser, Hach Lange and PPM analytical monitors. Our current asset base is in the region of 2000 analytical monitors which are spread across ~560 STW and HD sites all within the STW and HD region.
The Utility is seeking to engage suppliers to support PFAS catchment investigations as part of its AMP8 programme. The services will focus on two Tier 2 surface water catchments and include:
Desk-based review of water quality and catchment risk data
Targeted PFAS sampling in surface water, sediment, and wastewater
Flow monitoring and integration with water quality data
Forensic analysis and fingerprinting of PFAS sources
Mass balance modelling and conceptual catchment understanding
Evaluation of mitigation options including feasibility, cost-effectiveness, and sustainability
Stakeholder engagement planning and support
Provision of spatial data for GIS-based Catchment Risk Assessment
The aim is to identify PFAS sources, understand concentration variability, and assess mitigation strategies to reduce reliance on energy-intensive treatment methods.
Severn Trent LCV Framework - Preliminary Market Engagement Notice
Provision for HGV vehicles for the Utilities (Severn Trent & Hafren Dyfrdwy) AMP8 Replacement & Growth Programme.
We are keen to engage with interested suppliers. Any future Tender Notice will be published and response to this pre market engagement is optional and does not contribute to any procurement process.
We invite suppliers to complete the following form and we will be in touch:
https://forms.office.com/e/MpRxUW6y6N
Severn Trent & Hafren Dyfrdwy are conducting a market engagement exercise to better understand the capabilities and interest of leading suppliers in the fuel services sector. This exercise is purely for market engagement purposes and does not constitute any part of a formal procurement process. Your insights will help us shape the scope and strategy for future tender. If you are interested in participating, please reply with the relevant information. We have an extensive fleet of Company Cars, LCV and HGV vehicles with a total combined fleet of over 3000. The Severn Trent & Hafren Dyfrdwy region covering the central midlands region and northern Wales.
We are looking for the provision of fuel cards for fuelling Diesel / Petrol at Fuel Stations and EV cards for charging electric vehicles across a public charging network. This list is not exhaustive and there are additional services we may require.
To register your interest and understand more about our current requirement please complete the following form link: https://forms.office.com/e/JdZNPG7AWH
Preliminary market engagement notice - UK2
The Utilities (Severn Trent Water & Hafren Dyfrdwy) are looking to explore the market for the provision of Electric Vehicles for employee through a Salary Sacrifice Scheme.
The Waste Digital Twins will be an end-to-end digital representation of the Sewage Treatment Works, which will allow visualisation, simulation and optimisation of the treatment processes on the site. Initially the optimisation recommendations will be manually implemented, with a view to moving towards full automation at a later date.
We are seeking partner(s) with demonstrable expertise in mechanistic and deterministic modelling, digital twin architectures, cloud‑based simulation systems, and operational optimisation. The successful partner(s) will help define and deliver the modelling Blueprint, establish a best‑practice modelling methodology, and work alongside our System Integrator(s) to develop a scalable, flexible and future‑proof Waste Digital Twin platform.
Delivery will follow a phased and iterative approach:
Phase 1 - Feasibility: Evaluate and recommend modelling pathways, either via mechanistic software or coded mechanistic model conversion.
Phase 2- Deployment: Iteratively deploy, validate and refine Digital Twins across sites, embedding learnings and enhancements.
Partners will be expected to provide specialist capability, flexible resourcing, and operational support while upskilling Severn Trent's internal teams in DataOps, MLOps and Digital Twin operations. This includes integrating modelling outputs within a wider systems architecture, supporting interim standalone solutions ahead of future integration with the Asset Data Programme, and ensuring all work aligns with Severn Trent's cyber and data governance guardrails.
Severn Trent are currently investigating the potential procurement of supply and installation of covers for a range of ASP (Activated Sludge Plant) tanks at up to 23 of our sewage treatment works with some sites having multiple ASP assets. Severn Trent is also considering the procurement of covers for its Liquor Treatment Plants.
The intention is to collaboratively work together with supplier(s) to identify the best solution for our sites. The purpose of the cover is to capture gas emissions from the mixed liquors in the tank, which constantly receives aeration with high airflow.
We require covers that can deal with air pressure and cope with a certain level of pressure fluctuation. As such the cover should be sealed to the tank and reasonable steps should be taken to minimise the leakage of gas. It is expected that extraction points will be required to remove the gas for processing.
The Supplier/s awarded to the Framework will be required to provide Forestry Planting and Maintenance Services across the Midlands; Upper Derwent Valley (Derbyshire) and Lake Vyrnwy (Wales). They may also be required to carry out other related services in the Severn Trent Area and Hafren Dyfrdwy area.
Multi-Lot Framework for the Supply (including design, assembly, delivery and co-commissioning) of modular:
- Fixed‑Film Biological Equipment
- Preliminary Treatment Equipment
- Primary Filtration Systems Equipment
To be delivered through the Severn Trent Water (STW) Capital Supply Chain, across AMP8 at multiple sewage treatment works.
These goods will be bought directly through a STW appointed delivery partner, or directly by STW and novated to the relevant installation partner.
Severn Trent requires a commercial, off-the-shelf SaaS platform that is capable of automating preliminary design for water and wastewater treatment infrastructure. The current approach to early-stage design requires manual calculations and analysis of varied datasets, followed by document production for design reviews and governance, resulting in inefficient ways of working and substantial design rework. We require a design solution to bring automation to this end-to-end process, helping our design teams quickly produce and evaluate design options, accelerating the overall design process.
The platform must combine all of the following capabilities within one solution (not delivered as separate, disconnected modules):
1. Domain Depth & Embedded Engineering Knowledge: These requirements ensure the solution is a true engineering platform - not a custom tool or services proxy. Engineering standards, heuristics, and design rules must be explicitly encoded within the platform itself, rather than inferred from documents, learned from examples, or left to user judgement.
2. Native support for water and wastewater treatment assets: The platform must natively support water and wastewater treatment infrastructure. This includes process-driven layouts, unit process sequencing, equipment sizing, and regulatory or code-driven constraints, without requiring custom modelling or scripting.
3. Standards-driven and deterministic behaviour: Design behaviour must be governed by explicit engineering standards and schemas, producing consistent, explainable results that do not vary run-to-run based on prompts, user phrasing, or probabilistic inference.
4. Governance, Auditability & Long-term Use
These requirements differentiate a durable system of record from point tools or one-off solutions:
Auditable design history
The platform must maintain a persistent, reviewable history of design inputs, assumptions, changes, and outputs suitable for regulatory review, capital planning, and financial or technical audits.
Separation of design logic from deliverables
Engineering logic must be independent of output formats, allowing the same design logic to be reused across projects, asset types, and downstream tools without re-authoring or re-engineering.
Proven owner-operator adoption
The solution must be designed for use by asset owners or utilities - not solely by consultants or contractors - to support internal planning, option evaluation, and decision-making.
3. Time-to-Value & Immediate Usability
Services-led or custom-built solutions have been determined to be unsuitable, preferring pre-existing :
Operational on day one without custom development
The platform must be immediately usable upon subscription by owner or utility staff, without vendor-led customisation, bespoke development, or extended onboarding projects.
Hours-to-design, not weeks-to-prototype
The system must generate complete preliminary designs withing hours or days, not weeks, for new projects without incremental setup effort.
Repeatable use without vendor dependency
End users must be able to execute new projects and iterations independently, without reliance on the vendor to execute and / or to enhance usability.
4. Design Outputs and Data Requirements
These requirements focus on what the system produces, not how it may be marketed:
Design-grade, structured engineering data
The platform must generate machine-readable, structured engineering data representing process units, equipment sizing logic, and interdependencies - alongside standard outputs such as PDF and BIM - suitable for downstream modelling, costing, and authoring systems.
Traceable assumptions and documented logic
Each design must include explicit, inspectable assumptions and rules (e.g. design criteria, applied standards, constraints), supported by in-platform technical documentation sufficient for internal validation and regulatory review.
Multi-option, directly comparable designs
The system must produce multiple complete preliminary design options while using a consistent structure that enables direct comparison of cost, footprint, performance, and risk.
The platform must be a proven, commercially available product - not in early development or awaiting first deployment - and should have demonstrated successful results with other water companies within the UK and particularly with other WASCs.
Severn Trent already have a piece of critical software proven and in place, so will only consider products that offer the same functionality today; there will be no opportunity for ramp-up development.
It must also integrate seamlessly with core utility systems where required (e.g., Common Data Environment).
Severn Trent requires a single, integrated waste water monitoring and alert platform. Relying on multiple standalone systems for different functions leads to inefficiencies, data inconsistencies, and slower decision-making. A unified solution will provide complete network visibility, enable smooth data exchange across all components, and support faster, more effective operational responses.
The platform must be able to perform efficiently and accurately across our entire waste water network. Some context to this is provided below:
• Population served (sewerage): 8.5 million people across the Midlands and Mid‑Wales
• Number of sewage treatment works: 1,017 sites handling everything from small rural works to large regional plants
• Daily wastewater transport: 3.1 billion litres carried through c.93,000 km of sewer pipes (combined and foul)
The platform must combine all the following capabilities within one solution (not delivered as separate, disconnected modules):
• Pumping Station Monitoring: Delivers real-time insights into pump performance across the network, highlighting inefficiencies, abnormal behaviour, or potential failures to reduce downtime and improve asset reliability.
• Blockage Prediction: Uses flow and level data to identify unusual patterns that indicate potential blockages, enabling proactive maintenance before issues escalate into customer disruption or pollution.
• Customer Sewer Alarm (CSA): Provides early warning alerts for customer-facing areas of the network where blockages or overflows could cause property flooding. This includes monitoring both digital and analog pressure data to detect problems before customers are impacted.
• Burst Rising Main Detection: Accurately detects bursts in pressurised sewage mains to minimise pollution risk and operational disruption.
• Excess Water Detection: Identifies abnormal water ingress from sources such as rivers, groundwater, or misconnected rainwater, which can lead to spills, damage, and reduced efficiency.
• Network Spill Forecasting: Predicts spill risk based on rainfall, network capacity, and system behaviour, enabling early interventions to maintain compliance and reduce environmental impact.
• Sewage Treatment Works Monitoring: Provides early detection of process abnormalities and compliance risks by analysing key treatment parameters and storm‑tank behaviour, enabling proactive interventions to protect permit performance and environmental outcomes.
The platform must be a proven, commercially available product - not in early development or awaiting first deployment - and should have demonstrated successful results with other water companies, ideally within the UK and particularly with other WASCs. Severn Trent wish to consider products that offer the same functionality and scale as the systems in place within the business today; there will be no opportunity for ramp-up development.
The platform should ensure full compatibility with Severn Trent's existing sensor fleet and seamlessly integrates with core utility systems (including SCADA, telemetry, SAP, and GIS), meeting interoperability standards to interpret data from all current sensors and network devices. Severn Trent will not consider any platforms that require new sensors to be introduced and installed.
Severn Trent Water is a business that operates 24 hours a day, 7 days a week, all year round. Given the nature of this platform, Severn Trent Water are looking for a vendor who can offer enhanced software support and agreed service levels. Applicants who cannot demonstrate a suitable level of support will be rejected.
Severn Trent Water wishes to improve its ability to cleanse pressurised wastewater assets rising mains (RM) and clean water mains to address potential problems within its asset base. Failure to do this could otherwise result in wastewater assets presenting with rising main blockages, asset failure and lead to further problems such as blockages/pollution/sewer flooding. Within the clean water network this is to remove biofilms and the risk to water quality. Part of the solution to achieving this goal is to have a way of cleansing these pressurised pipes which, in some instances are >500m long and only have one means of insertion and one means of extraction sometimes ~2km away. STW would like to move into a proactive space for asset cleansing without causing disruption through asset failure. We currently do not have a similar solution within the business and are therefore looking to explore delivery solutions as part of this pre market engagement.
This is an early engagement notice to enable Severn Trent to share details of a newly designed Chemical Dosing Rig for feedback that will assist us in structuring our upcoming tender due to be released in November 24.
We are planning to hold a Supplier Engagement Session W/C 21st October 24 which will provide:
An overview of Severn Trent and the Plug and Play initiative
Upcoming tender detail
Overview of our design
Questions, Answers & Feedback session
In brief our tender will include the Design Validation, Assembly and Install of our newly designed Chemical Dosing Rig at sites across the Severn Trent regions for AMP 8.
Please register your interest to participate in this early engagement session by emailing andrea-ca.thomas@severntrent.co.uk
You will be required to sign an NDA prior to participation.
In June 2022 Severn Trent Water carried out a site security systems and equipment category market testing RFI exercise via Achilles.
Following development of our site security category strategy for AMP 8 we will be approaching the market via a regulated procurement event using FTS.
The Main Security tender event will encompass several specialist "Lots" and contracts to enable site security systems and equipment to be upgraded and maintained across the Severn Trent and Hafren Dyfrdwy geographical footprint, and covering the AMP8 period (2025-2030) e.g., as
*Lot 1 Electronic Security (Capital framework / Maintenance agreements)
*Lot 2 Physical security (Capital framework only)
*Lot 3 Security IT network services (Maintenance agreement only)
*Lot 4 Security fencing and gates (Capital framework / Maintenance agreement[automatic gates] )
*Lot 5 Tier 1 Aggregator (encompasses Lot 1/2/4) (Capital framework only)
The outline procurement timetable is to commence the main security tender event in 2Q of 2023, and execute contract agreements in 1Q 2024.
Prior to launch of the event we plan to hold an online supplier forum to present our contracting, and procurement strategy to the security category supply-chain and interested parties.
To register interest in attending the online Teams event (planned to be held circa. mid to end of May), please email: sacha.ryder@severntrent.co.uk with the following contact information and the subject line "ST Security Supplier Forum":
• Company name
• person name
• email address