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Hydro International offers innovative products for the cost effective control of stormwater and treatment of wastewater.
The Group has developed a range of technologies to control urban run off, treat stormwater, combined sewage overflows and municipal wastewater with the aim of providing cost-effective solutions for controlling quantity and improving quality of water.
Through the application of advanced vortex and complementary technologies Hydro International’s line of products provide an economical solution to control the quantity and improve the quality of water.
Please use the menu options above to access our product information and to find out more about Hydro International.
Vision
To be the leading provider of innovative products and environmentally sustainable solutions for the management of water.
Mission
Customer
Hydro International provides market leading products and associated services for the management of water in compliance with environmental regulations.
Values and the Environment
We are committed to the highest standards of health and safety, ethics and integrity in relation to all our stakeholders, including; the environment, employees, suppliers, customers, and shareholders.
Innovation, Systems and Markets
We promote a culture of innovation and service based on a clear understanding of our customers’ needs and our markets.
Prosperity
We strive for sustained growth, profitability and the future success of our business.

In addition to individual applications, Hydro International offers Stormcell®, Stormbloc™, Hydro-Brake® Flow Control and Downstream Defender® as an award winning Integrated Stormwater Package. Together, our products provide comprehensive solutions to meet the most stringent regulations.
In 2003 the Integrated Stormwater Package received first prize at the IWEX Innovation Awards for its 'Contribution to Environment and Sustainability'.
Stormwater
Stormcell® Stormwater STORAGE System
A low cost, underground storage system suitable for installation beneath roads, car parks and amenity areas. Stormcell® is installed utilising a patented pipework system which prevents the entry of silts and grits into the storage volume.
Stormbloc™ Stormwater INFILTRATION System
A block type structure with a patented maintenance/inspection tunnel for providing underground surface water infiltration and soakaway systems.
Hydro-Brake® Flow Control
A self-activating vortex flow control that provides superior hydraulic performance over conventional flow regulators with patented features that reduce maintenance requirements.
Downstream Defender®
An advanced hydrodynamic vortex separator designed to remove sediment, floatables and associated pollutants from stormwater.
StormBank™ Rainwater Harvesting System
A cost-effective rainwater harvesting system suitable for toilets and external use. Easy to install, use and maintain.
Wastewater Products
Hydro International is the leading expert in wastewater management, providing efficient, cost effective technologies to protect public health and safeguard water quality.
A range of products is avaliable for Inlet Works, Primary Treatment, Tertiary Treatment, Slugde Screening and Treatment, Sludge Scapers and Surface Scrapers. Spares and servicing agreements tailored to suit requirements are offered.
DynaSand, Lamella and SlugdeScreen plant processes are avaliable for long and short term hire. Hydro International's Water and Wastewater divison is certified to ISO 14001.
CSO - Combined Sewer Overflow
A package of products that are designed for the removal of floatables, gross solids and sediment from combined sewer systems The Hydro-Ject Screen provides a non powered screening solution, whilst separation of finer solids and sediments is achieved wiht the Storm King overflow with Swirl Cleanse Screen. Powered screening is achieved with the Heliscreen. Static screening is achieved using the Hydro-Static Screen. Control of flow rates is achieved with the Hydro-Blake Vortex Flow Control.
Research & Development
Hydro International is committed to a policy of continuous product development.
Our products are the best the market has to offer and our research and evaluation methods ensure that site-specific solutions set the standards.
To ensure that research outputs are of the highest quality, Hydro International utilises state-of-the-art testing technology and analytical techniques both in-house and through independent centres of excellence.
Third Party Verification
Hydro International understands the importance and benefits of utilising external testing resources that allow our products to be independently assessed under actual field conditions, working closely with the following entities:
- Research / Academic Institutions.
- Regulatory Agencies.
- Consulting Engineers.
- Councils / Municipalities.
Part of the Group's development strategy involves harnessing the immense untapped knowledge potential in Universities through the formation of collaborative links.
In-house Testing Facilities
In addition to field testing and external validation, Hydro International operates two dedicated Research and Development Centres with well equipped laboratories in the UK and US.
Hydro International's advanced testing facility in Portland, Maine in the US allows full-scale testing to be performed under controlled conditions. The UK facility includes a number of hydraulic test apparatuses, including a purpose designed flow regulator test facility.
Computational Fluid Dynamics (CFD)
In recent years, Hydro International has developed considerable expertise in Computational Fluid Dynamics (CFD) simulation. This ability to mathematically model flow fields and assess device characteristics is enabling rapid prototyping, thereby shortening product development cycles, and improving the quality of outputs.
| Roger Lockwood | Chairman, Non-Executive Director |
| Stephen P Hides | Chief Executive Officer, Executive Director |
| Chris Williams | Chief Operating Officer, Executive Director |
| Tony Hollox | Finance Director, Company Secretary & Executive Director |
| Prof. Robert | Director of Innovation, Executive Director |
| Michael Stevens | Non–Executive Director |
Company AddressClevedon Hall Estate
|
CapitalAs at 8 August 2008, the total number of ordinary shares of 5p of Hydro International plc in issue was 14,251,960 with each share carrying the right to one vote. None of the shares are held in Treasury. |
Annual General MeetingMay | Year End31 December |
Nominated BrokersNominated Adviser & Stockbroker | Nominated AdvisorsNominated Adviser & Stockbroker |
| T J Lamb (Mrs) | 2,566,782 | 18.01 |
| J Hart | 896,051 | 6.29 |
| Impax Environmental Markets plc | 835,000 | 5.86 |
| Hazell Carr Edwards Furbs | 750,000 | 5.26 |
| Impax Environmental Markets (Irl) plc | 555,000 | 3.89 |
| Varsity Actuarial Limited | 490,000 | 3.44 |
| Jupiter Ecology Fund | 450,000 | 3.16 |