upgrading infrastructure

Delivering ODI‑focused, high‑performance water & wastewater outcomes

The water sector is entering its most demanding regulatory period yet. Achieving ODIs and performance commitments across resilience, leakage, PCC, asset health, pollution reduction and environmental improvement requires smarter, more integrated and more accountable delivery. 

At United Infrastructure, we work alongside water companies to deliver infrastructure and technical services that materially improve regulatory performance. Our solutions are designed around the outcomes customers value most – enhancing asset reliability, environmental compliance, customer service and wholelife value. 

As part of United Infrastructure Group, our Water division brings together the strengths of three specialist organisations: 

  • United Infrastructure – Major water networks, mains renewals and strategic infrastructure delivery 
  • AFECO Ltd – Process, MEICA, optimisation and environmental engineering 
  • Peter Duffy Ltd – Civil engineering and wastewater network specialists 

Together, these capabilities create a connected, frictionless and wholelifecycle delivery model – supporting the increasingly complex regulatory, environmental and performance requirements of AMP8 and AMP9. 

 

Our Core Expertise

Mains Renewal and Network Infrastructure

We deliver highvolume, highreliability mains renewal and network enhancement programmes focused on reducing leakage, unplanned interruptions, water quality events and a decline in asset health. Our approach supports ODIs across leakage, PCC, CRIs, AIS and network resilience. 

Capabilities 

  • Mains renewal and rehabilitation 
  • Major pipelines and strategic reinforcement 
  • Trunk main interventions and condition improvements 
  • Lead replacement (network & customer side) 
  • Smart metering installation and data integration 
  • Lowcarbon construction and wholelife design 

Strategic Infrastructure Delivery 

  • Regional water transfers 
  • Resilience schemes 
  • New pipelines, boosters and service reservoirs 
  • Climate adaptation and drought resilience 

Wastewater expertise

Wastewater Infrastructure

By integrating Peter Duffy’s civil engineering expertise with AFECO’s process and environmental capabilities, we deliver seamless wastewater solutions from concept to commissioning. 

Capabilities

  • Rising mains, large civils and capacity upgrades 
  • Sewer network enhancements to reduce flooding, infiltration and blockages 
  • CSO compliance and storm overflow reduction 
  • Pollution reduction and environmental improvement 
  • Pumping station upgrades and asset health improvements 
  • Embedded lowcarbon, sustainable construction practices 

These activities support ODIs for pollution reduction, environmental compliance, flooding resilience and asset reliability. 

water pipes

MEICA & Optimisation

Non‑Infrastructure Technical Services

Built on AFECO’s deep technical heritage, our MEICA and optimisation services help water companies improve performance, reliability and compliance while reducing emissions and operating costs. 

Phosphorus Removal Solutions 

  • Chemical dosing 
  • Enhanced biological P removal 
  • Filtration upgrades 
  • Optimisation to meet tightening permits 

Sludge Optimisation 

  • Aeration and digestion improvements 
  • Thickening and dewatering optimisation 
  • Chemical reduction 
  • Biogas yield improvement and energy savings 
  • Reduced haulage and improved sludge quality 

These services support ODIs across compliance risk, resilience, energy reduction, carbon and operational efficiency. 

water pipes

A collaborative, insight‑led and accountability‑driven approach

How we deliver

We deliver outcomes through close collaboration with operational teams, regulators, customers and communities. Our approach blends technical expertise, practical insight and disciplined programme delivery. We ensure works are understood, disruption is reduced, and issues are resolved quickly, supporting C-MeX, D-MeX and wider customer satisfaction measures. 

 

Our Organisational DNA

1. Challenge Led Engineering

We challenge assumptions to engineer outcomes – not default designs or standard builds.
By stripping out unnecessary complexity, we deliver smart, safe, costeffective and reliable solutions that work in realworld operational environments.

2. Pace as a Discipline

We work at pace because pace reduces cost, disruption and risk. We take decisions quickly, mobilise rapidly, and maintain momentum through disciplined planning and proactive problem solving.

3. Total Accountability

Predictable outcomes require clear ownership. We remove interfaces, simplify governance and take full responsibility for risk, budget and performance – giving water companies a single accountable partner.

4. Frontline First

Everything is anchored in field reality. Zero harm, customer connection and ontheground operability guide every decision, ensuring solutions are safe, maintainable and robust. 

Innovative techniques supporting efficiency & carbon reduction

  • Trenchless technologies for mains replacement and wastewater upgrades 
  • Recycled and lowcarbon materials across civils and reinstatement 
  • Optimised design to reduce embodied carbon and excavation footprint 
  • Digital twins and hydraulic modelling to optimise design before construction 
  • GISenabled planning to reduce travel, rework and unnecessary disruption 
  • Smart commissioning and remote telemetry to improve OPEX outcomes 
  • Highefficiency MEICA installations 
  • Smarter aeration, pumping and dosing control 
  • Process optimisation to reduce energy, chemicals and waste haulage 
  • Deployment of electric plant where feasible 
  • Logistics optimisation to reduce vehicle movements 
  • Wholelife carbon assessments to inform decision making 
  • These innovations help water companies reduce carbon, lower wholelife costs and accelerate delivery—while improving regulatory performance. 

Our valued client

Northumbrian Water Group

We have a longstanding, collaborative relationship with Northumbrian Water Group, working in partnership across a range of water projects.

United Infrastructure engineer-led expertise has helped maintain the water network across the entire Northumbrian Water supply area since 2005 – delivering complex projects successfully and safely, ensuring a resilient water supply for the North East of England. 

Learn more about our partnership with NWG through the link below.

construction worker overseeing digger completing excavation works

Infrastructure Services

The future belongs to all of us

We have developed an ESG Plan for our Infrastructure Services business, which gives a focused approach from which we can track our journey towards creating a connected, sustainable future.

Our ESG Plan has three focus areas, with high level commitments to optimise our impact.

How we work towards delivering these commitments will be shaped and reviewed continuously through our internal governance frameworks. We will measure and report against them via our reporting mechanisms and the publication of our annual ESG Impact Report.

Our clients

Proud to work with

Affinity water logo
Anglian Water logo
Essex and Suffolk water logo
Northumbrian Water logo
Scottish Water logo
Severn Trent Water logo
southern water logo
United utilities logo
Yorkshire Water logo

News

Our latest news

view all
01/05/2026

United Infrastructure Announces Leadership Updates Across Infrastructure Services

United Infrastructure is pleased to share a number of leadership updates within our Infrastructure...

17/04/2026

United Infrastructure secures place on SP Energy Networks clean power frameworks

United Infrastructure has been awarded two major SP Energy Networks frameworks, covering both substation...

26/03/2026

United Infrastructure to deliver cathodic protection upgrade at Bacton Gas Terminal

United Infrastructure is pleased to announce that it has commenced a major upgrade to...

19/02/2026

United Infrastructure secures Cadent contract at Bromley-By-Bow Gasworks

United Infrastructure is pleased to announce the acquisition of Simkiss Group, a leading engineering...

22/01/2026

United Infrastructure appointed to Wessex Water Minor Works Infrastructure Framework

We have been appointed by Wessex Water to deliver design-and-build services under its Minor...

13/01/2026

United Infrastructure awarded national maintenance framework by Cornerstone for UK-wide telecoms estate

United Infrastructure is pleased to announce that its Connected business has secured a major...

Accreditations

Proud of our accreditations

Achilles carbon reduce certified logo
Achilles logo
bsi logo
CEMARS logo
Construction online gold member logo
ICES approved partner logo
information commissioners office logo
Institute of water logo
pipeline industries guild logo
Rospa gold award
ssip logo
USAG logo
Water industry registration scheme logo

Have a question?

Get in touch

Whether you have a specific project in mind or if you’d like to find out more about our water infrastructure services across the UK, we’d love to hear from you.

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