Expert engineering and project services, delivered with flexibility and a focus on long-term performance.

We offer a comprehensive range of engineering, installation, and consultancy services to help clients achieve lasting performance, resilience, and efficiency. Known for delivering robust and innovative solutions, Purestream ensures your water and clean energy assets are designed for long-term value, operational flexibility, and energy efficiency.

Our services cover every stage of project delivery — from initial concept through to fully detailed engineering and site commissioning. We provide independent technology selection to ensure the best-fit solutions for your needs, combined with expert programme and project management to keep delivery on track.

Our experienced team manages seamless site installation, commissioning, and operator training to ensure smooth handover and optimal performance. We also support clients in refurbishing and upgrading existing assets, helping you extend the life and efficiency of your infrastructure. From small site works to large, complex international infrastructure projects, we tailor our services to meet your specific requirements — delivering practical solutions with measurable results.

Expert consultancy and strategic support to help you optimise asset performance and investment outcomes.

Our engineering expertise spans process, mechanical, electrical, and ICA disciplines — combined with deep operational insight and commercial understanding. This allows Purestream to deliver asset solutions that are not only technically robust, but also fully aligned with your commercial objectives.

We provide strategic consultancy across all stages of the asset lifecycle. Our team delivers project and technology feasibility studies, technical and commercial due diligence, and independent technology selection and evaluation to support informed investment decisions. We also help asset owners develop and manage investment plans that maximise value over time.

Once operational, we support performance monitoring and reporting, optimisation, and troubleshooting — helping you continuously improve asset efficiency and reliability. We also work with clients to develop clear operational and management procedures, ensuring ongoing compliance and best practice.

Whatever your asset challenges, Purestream provides practical, results-focused consultancy to help you achieve the right outcomes.

Complete end-to-end project development for water, wastewater, and clean energy infrastructure.

Purestream specialises in the origination and development of water, wastewater, and clean energy projects — combining technical expertise with practical delivery. We bring deep experience across inlet works design, biological treatment, chemical dosing systems, anaerobic digestion, biogas utilisation, and biosolids treatment. This allows us to help clients turn ideas into fully operational, high-performing assets.

We offer a full project development service, enabling clients to progress from initial site assessments through to permitted, funded, and built projects. Our team manages planning and permit applications, technology selection, and both concept and detailed design — ensuring each project is optimised for long-term value and efficiency.

Where required, we also support sourcing and structuring project finance, helping clients unlock funding pathways and manage risk effectively. By providing an integrated, end-to-end service, Purestream ensures your project is delivered in a cost-efficient and timely manner — from concept through to completion.

Strategic business planning support to strengthen investment cases and deliver value through every regulatory cycle.

Purestream Design brings expert insight to help clients shape robust business plans, particularly within the context of regulated investment frameworks such as Ofwat’s PR24 and future AMP periods. Our team combines technical depth with commercial understanding to ensure your proposals are realistic, evidenced and outcome-focused.

We support clients in defining project needs, developing investment justifications, and aligning technical strategies with costed delivery plans. This includes performance forecasting, risk analysis, and scenario modelling to ensure resilience and value for money. Our engineers work collaboratively with asset owners and regulators to translate technical requirements into compelling, fundable business cases.

With decades of experience supporting successful submissions and regulatory engagement, Purestream helps ensure your plans not only meet the brief — but deliver long-term value for customers and the environment.