Water & Environmental
Our proven expertise in both framework delivery and bespoke project solutions is supported by
an extensive national network of offices and depots, ensuring a reliable, responsive service.
OCU is a water & environmental infrastructure service provider, safely delivering innovative and reliable solutions. We offer consultation, design, build and maintenance support for our clients across the UK & Ireland.
From potable and raw water systems to sewer risings mains, sewer replacement, refurbishment and more, we work closely with treatment facilities, water and wastewater networks. In addition we offer comprehensive specialist design and installation capability across the Heat Networks sector.
Wastewater Sewer Works
Wastewater Modular Treatment Plants
Water Infrastructure
MEI
Our range of Water & Environmental services includes:
Design consulting and process engineering
Advanced water designs
Specialists in MEICA and process design/engineering
Consulting services
Design and engineering
Temporary works design
Digital engineering
Building Information Modelling (BIM)
Non-infrastructure – treatment system solutions
New builds, refurbishment, and upgrades
New build reservoirs and Pumping stations
Tanks, including raw water storage, primary contact, filtration, settlement
Storage tanks and mixers
Dual contained pipework and chemical dosing systems
Aeration, primary, secondary and tertiary treatment plants
SAF, iSAF & Anoxic SAF Biological wastewater treatment
Electrical installations, instrumentation control and automation
Modular hire solutions
Treatment technology process solutions – modular
Design, development, manufacturing, selection of temporary and permanent wastewater treatment systems.
Full civil, mechanical and electrical installation
Maintenance of existing assets
Product supply for primary and secondary solids removal, phosphorus removal and biological treatment
Mechanical, electrical and instrumentation solutions
Project management and design (HV & LV)
Commissioning and protection testing
Full commissioning of HV installations
NICEIC approved contractor for hazardous and non-hazardous areas
Electrical design to BS7671
Cable installation – power, controls, and communications
Inspection and testing capabilities
Design and manufacture of LV control panels
Infrastructure – pipelines, developer and network services
Civils work
Traffic management and streetworks
Pipelines
Mains Renovation
Slip lining
Service replacements
Developer Services (WIRS)
Large scale new connections and commercial supply
Flood defence, harbour and pier, surface water management Flood Defence
Construction of flood defence
Earthworks embankment
Pumping station installation
Flood gate installation
Dredging and dredge deepening
Foreshore reclamation
Seawall construction
Surface water management ponds and channels
SUDs and Swales construction
What our clients say...
Featured Case Studies
Vyrnwy Aqueduct Modernisation Programme
The Vyrnwy Aqueduct programme involves a major refurbishment of one of United Utilities' oldest and most strategic clean water assets. Phase one, completed in 2024, included cleaning, seal repairs, and new valves on Line 3. The project is scheduled to be finished by 2028.