We help you improve the way you process, treat and manage water.
With 40 years of experience and a reputation for engineering excellence, people all over the world rely on our products and services to increase operational performance and reduce environmental impact.
Who is Hydro International?
We are a global company who provide advanced products, services and expertise to help municipal, commercial and industrial customers to improve the way they process, treat and manage water.
How can we help?
Control the flow of storm and surface water, deliver effective water management projects and cut the risk of flooding to homes, businesses and infrastructure.
Climate change and urban growth have contributed to an environment in which flooding is an increasingly frequent and damaging occurrence. Sustainable, water-sensitive and low-impact development initiatives around the world highlight the need for effective flood mitigation, and forward-thinking engineers are combining natural and proprietary water management products to deliver the best possible protection.
Our flow control and storage products help engineers to design systems that slow and hold water during storm events, preventing and controlling flooding, mitigating flood risk and reliably protecting people and property.
Remove grit and solids to improve water quality and reduce sludge handling costs at water and wastewater treatment plants.
Growing populations are placing a greater operational burden on existing water treatment facilities, and both current plants and new projects must contend equally with the damaging and costly effects of grit. Solids carried in wastewater accumulate in the downstream processes, which reduces plant efficiency as well as causing damaging abrasion to treatment systems—increasing operational and maintenance costs.
Our grit management technologies protect downstream processes, cutting maintenance and preventing clogging and deposition. Our sludge management products improve dewatering and reduce solids handling.
Meet environmental obligations, improve operational efficiency and cut maintenance costs by managing, recycling and reusing process water and wastewater.
Water scarcity, increasingly stringent effluent discharge regulations and operational efficiency drivers represent real challenges for water-intensive industrial businesses. With process water use, treatment and discharge generating both cost and risk. Surface water, too, represents a risk, acting as a vector that carries potentially harmful materials into the environment.
Our industrial water management products help businesses to use water more efficiently, recover valuable processing by-products, meet regulations and protect the environment—saving money and reducing financial and legal risks.
Manage runoff and capture stormwater pollutants to comply with regulations and reduce damage to the environment.
Climate change and urban growth have created more frequent and more intense storm events, and greater areas of impermeable and impervious surfaces. When rain falls on the built environment it generates surface water runoff, which, if not controlled, can cause surface or sewer flooding. The runoff can also pick up a range of pollutants, including oils, heavy metals, nutrients and silt. When this stormwater runoff reaches a storm drain or sewer it transports any pollution into the network, which may discharge directly or indirectly into the environment.
Our flow control products control, store and infiltrate surface water, while our stormwater treatment products catch and retain stormwater runoff pollution before it reaches the environment, preventing damage to fragile and important ecosystems.
Protect the environment by removing trash, solids and other damaging pollutants from combined sewer overflows.
Combined sewers transport both wastewater and surface water runoff to wastewater treatment plants (WWTPs). Heavy, intense or prolonged rainfall can overload these combined sewers, which can overwhelm downstream treatment facilities. A combined sewer overflow, or CSO is designed to act as a kind of safety valve for the WWTP that diverts excess wet weather flow, enabling the plant to continue operating and preventing upstream flooding.
Our CSO screening and treatment technologies catch gross solids and floatables during these excess flow events, protecting the environment from damaging overflow pollution.
Use real-world, real-time data to make better response, planning and asset management decisions.
Built and natural water environments are large and complex systems, and it can be difficult to model and forecast supply, demand and flood risk. In many cases people rely on outdated, incomplete or unrepresentative climate and hydrometric data to make critical and urgent decisions, or—worse—make decisions without the benefit of data at all.
Our data loggers, telemetry, databases and analysis systems provide real-time, real-world insight into environmental, network and system conditions, improving incident response, planning and asset management activities.
What's new at Hydro International?
Posted - 21 August 2023
In this blog our Technical Team Manager, Chui Green answers some common questions about the extended Stormbloc® Optimum range. Earlier…
Posted - 31 July 2023
We’re excited to announce that the Hydro-Brake® Optimum flow control is now included in the Site3D civil engineering design software…
We have been acquired by Oldcastle Infrastructure
Hydro International is now part of the world’s leading provider of building materials solutions that build, connect and improve our world. …
Chemical dosing delivers exceptional TSS removal for industrial customers
During a recent Hydro MicroScreen™ installation in the UK we collaborated with the customer to test chemical dosing of the system. The…
Posted - 18 April 2023
Hydro International, the market leader in water management products and services, unveils its expanded UK Stormbloc® Optimum range,…
Hydro International secures space for growth with new office move
Hydro International is securing its future growth opportunities as it relocates its head office to Kenn Business Park in Clevedon, near…
Hydro International’s UK Wastewater Services apprenticeship scheme crafts the next generation of inlet works experts
Posted - 24 October 2022
Hydro International’s industry-leading UK Wastewater Services team, M&N, is working to provide best-in-class engineers through its…
Posted - 22 March 2022
We are launching the new Downstream Defender® Select, a modular next-generation hydrodynamic separator optimised for the treatment of…
Posted - 28 January 2022
Our two-year research project with the University of Exeter has optimised our stacked tray design, and opens up new performance upgrade…
Hydro International welcomes three new apprentices
Hydro International’s UK Wastewater Services Team, M&N, is pleased to announce the appointment of two new engineering apprentices to…
New DAF and drum screen capability for industrial customers
We are now offering DAF and drum screen technology for industrial customers in the UK and Ireland. We are pleased to announce that we…
Posted - 21 January 2021
Hydro International is pleased to announce the award of Anglian Water’s Framework to maintain Inlet Screens and Screenings handling…
Hydro International’s Stormbloc® Optimum provides vital stormwater management around the UK.
With an additional 1.2 million Great British properties being placed at risk of flooding by 2050*, the need for better stormwater…
Celebrating 40 years of Hydro International
We're celebrating our 40th anniversary! 2020 marked Hydro International's 40th year of doing business. Four decades after he…
New Hydro-Logic® Flexi Logger 105 provides engineers with an improved interface and new connectivity options
Posted - 03 November 2020
We have launched a new monitoring and telemetry logger to help engineers to monitor and collect more data for water flow, level, quality…
Up-Flo Filter's Growing Regulatory Approvals
Up-Flo® Filter continues to be accepted by more regulatory agencies across North America than any other stormwater filter and most…
Hydro International Flow Control and Treatment Products now have 3D models for use with UK Building Information Modelling (BIM)
Posted - 08 September 2020
Drainage design engineers can now get 3D models of Hydro International products for use with Building Information Modelling (BIM). …
New Stormbloc Optimum Inspect Block
The new Stormbloc® Optimum Inspect block delivers a new way for UK engineers to meet Ofwat design guidance. We're introducing a new…
NJDEP Certifies Up-Flo Filter Extended Maintenance Cartridge at Highest Flows in the Country
NJDEP Certifies Up-Flo® Filter Extended Maintenance Cartridge with a performance rating that guarantees the smallest possible…
Hydro International appoints Paul Cleaver as Chief Executive
We're pleased to announce that Paul Cleaver has been appointed to the role of Chief Executive. Chairman Derek Sach: Paul brings a…
Up-Flo Filter ISO 14034 Verified to Satisfy ETV Canada Requirements
Up-Flo® Filter is now ISO 14034 verified to remove sediment, nutrients and metals from stormwater runoff. This is in compliance with…
Hydro International acquires M&N Electrical and Mechanical Services Ltd
We are now the UK’s leading provider of solutions for the wastewater treatment plant headworks. On the 22nd of July we acquired M…
Posted - 01 April 2019
Our consulting team has won three catchment-scale natural flood management projects with UK councils. The Hydro-Logic® Services team has…
Posted - 08 March 2019
Up-Flo® Filter has been certified by the Washington State TAPE to remove TSS and phosphorus. Performance monitoring of Up-Flo®…
New Trade Effluent Savings Calculator Launched
We have launched a new trade effluent calculator to help UK industrial businesses find out what they could be saving in trade effluent…
Posted - 07 February 2019
An Atlanta HeadCell® project wins a prestigious design award. Each year the Design Build Institute of America (DBIA) selects the best…
Posted - 21 January 2019
The Florida Department of Environmental Protection has accepted the Downstream Defender® hydrodynamic separator to remove nutrients…
Posted - 07 November 2018
First Defense® is the first stormwater separator to be verified through new ISO 14034 standard in Canada. The First Defense® oil…
Hydro MicroScreen wins top industrial project award
Hydro MicroScreen™ has been selected as a Top Project for 2018 by Industrial Water & Wastes Digest. The Hydro MicroScreen™ was…
Posted - 10 October 2018
We've acquired Oxford Scientific Software, developers of the Aquator water resources modelling software. On the 10th of October we…
Posted - 08 August 2018
California Water Board has approved Hydro International systems as Full Trash Capture BMPs. The California Water Board has…
Hydro BMPs Selected for Dozens of Top Vehicle Dealerships
Engineers have specified our stormwater separators and filters to treat stormwater runoff leaving dozens of the top vehicle dealerships…
Posted - 27 March 2018
The Much Wenlock Flood Alleviation Scheme in Shropshire, UK, has won the 2018 Sustainability award at Flood & Coast's annual…
Posted - 26 February 2018
Our new online tool makes it easy for engineers to design and specify customized flow control valves for US LID and flood protection…
Posted - 01 February 2018
The new Stormbloc® Optimum geocellular attenuation system provides SuDS storage and infiltration even in the most challenging of urban…
China's first Grit King commissioned
China's first ever advanced grit management system has been successfully commissioned. Our team has successfully commissioned China's…
Posted - 27 November 2017
Data from the Hydro-Logic® Services team helped SEPA, SSE and the Tay District Salmon Fishery Board to rejuvenate the River Garry. The…
New Guidance on the Construction of SuDS Now Available
CIRIA, the Construction Industry Research Information and Association, has released new guidance to support successful SuDS…
Posted - 24 August 2017
The City of Indianapolis has approved the First Defense® High Capacity stormwater separator with the highest stormwater treatment loading…
New joint venture with Thunip to deliver better water management to China
We have entered into a joint venture with Thunip Corporation Ltd., creating a Chinese company that will deliver our products locally within…
Downstream Defender Selected for NY Wheel Project
Downstream Defender® will provide stormwater treatment for Staten Island's New York Wheel.A 6-ft Downstream Defender® stormwater treatment…
Smart monitoring to track flood levels in Shropshire
Hydro International smart monitoring technology will provide insight into water levels at the Much Wenlock flood alleviation project.Our…
Posted - 12 July 2017
Virginia DOT approves Hydro International stormwater treatment systems. The Virginia Department of Transportation (VDOT) recently…
Hydro-Brake Optimum Design Now Supported in Causeway's Flow Software
Hydro International’s Hydro-Brake® Optimum flow control is now fully supported within Causeway’s state-of-the-art Flow drainage design…
Proprietary solutions could help the UK's damaged floodplains
Chris Newton responds to findings that 90% of the UK's floodplains have been changed so much that they no longer work properly - and…
Posted - 15 May 2017
Our Portland, Maine team spent a day cleaning up the Long Creek Watershed, and will study the trash collected to improve the way we…
Hydro-Logic Smart Monitoring launched to help water industry to plan, act and react
We have launched a new range of Smart Monitoring products and services to help businesses and public organisations to understand their…
Up-Flo® Filter Certified by NJDEP under New Testing Protocol
The Up-Flo™ Filter has been recertified for 80% TSS removal by the NJDEP.The Up-Flo™ Filter stormwater treatment system was recertified for…
Stormwater BMP Installations at Fitness Centers Across North Amercia
Happy New Year!Did you start 2017 with a resolution to make health and fitness a priority this year? Millions of North Americans began…
Posted - 21 December 2016
If you’ve still got last-minute holiday shopping to do, there’s a good chance you’ll be driving by or stopping into malls, plazas or stores…
Up-Flo Filter NJCAT Verified
The Up-Flo® Filter has been verified by NJCAT under a new stormwater treatment testing protocol.The Up-Flo® Filter stormwater treatment…
Posted - 01 December 2016
Despite heavy rain in the wake of Storm Angus, Hydro-Brake® Optimum flow controls continue to protect Telford homes. On the 21st of…
Smart monitoring demonstrates effective flow control
New “smart monitoring” hydrometric data shows how Hydro-Brake® Optimum controls the flow and prevents flooding exactly as designed. In…
Posted - 10 November 2016
Other stormwater filters were considered for treatment of the Harbor Terrace residential development in Perth Amboy, NJ, but ultimately…
Posted - 17 October 2016
Real-world testing in Pasaia, Spain demonstrated that Downstream Defender® and Up-Flo® Filter captured between 78% and 90% of pollution in…
Posted - 04 October 2016
North American regional grit gradation data is now available to help wastewater engineers, owners and operators to design and optimise WWTP…
Posted - 03 October 2016
Testing the Hydro-Brake® Drop at Bo'ness wastewater treatment works has allowed us to expand the design range and demonstrate its…
Posted - 23 September 2016
The UK Government’s review of National Flood Resilience commits to providing vulnerable communities with more temporary defences, a new…
Posted - 23 September 2016
We're helping Anglian Water to protect and improve water quality at Watton Water Recycling Centre. Anglian Water’s £3 million investment to…
Posted - 15 September 2016
Our online design software has been expanded to make it easier than ever for engineers to optimise designs and achieve the best possible…
Posted - 15 August 2016
Keith Hutchings argues that improving sludge quality could improve overall wastewater treatment plant efficiency. There has been a lot of…
Flow controls deliver sustainable drainage for challenging Llanelli housing development
Engineers took a pragmatic approach to designing surface water drainage at Taylor Wimpey’s new Parc-y-Strade housing development on the…
Posted - 12 July 2016
Battling against suds and floods took on a whole new meaning for the charity challengers in Hydro International’s annual “thrills and…
Hydro International adds a final polish to Muntons’ environmental credentials
A DynaSand® filter helps Muntons to treat beverage production process water and discharge environmentally compliant wastewater.Hydro…
Hydro International improves flood safety in Devon and flood warning in Nottingham
New automatic flood warning signs in Devon and a new surface water flooding system in Nottingham improve UK flood safety, monitoring and…
Posted - 31 May 2016
A ground-breaking Combined Sewer Overflow (CSO) trial is underway in eastern China to encourage water innovation and improve urban inland…
Posted - 19 May 2016
Hydro International volunteers clean up an impaired watershed, and will conduct environmental analysis on trash collected. Hydro…
NJDEP Authorizes First Defense® High Capacity with highest stormwater treatment loading rate in industry
Posted - 06 April 2016
First Defense® High Capacity has been certified for 50% Total Suspended Solids removal by the New Jersey Department of Environmental…
Posted - 09 March 2016
Hydro International acquires Hydro-Logic, adding hydrometric monitoring products and services to its water management portfolio. Hydro…
Posted - 03 March 2016
Hydro International has launched the Hydro DryScreen® next-generation baffle box for improved stormwater treatment. Hydro International…
Hydro International expands industrial and municipal water treatment options with new MicroScreen technology
Hydro International has acquired the assets of M2 Renewables Inc., expanding its range of water treatment technologies to incorporate the…
Posted - 01 December 2015
We have released our newest sizing calculator for the First Defense® High Capacity and the Downstream Defender® vortex stormwater…
Posted - 24 August 2015
Hydro International has been named in this year’s list of “Best Places To Work In Maine” for the second time in the past three years. …
Radical change of approach to grit removal arrives in UK
A radical change of approach to grit removal in wastewater treatment plants, being introduced to the UK for the first time, could be…
Posted - 09 January 2015
Hydro International has been awarded Top Project honours from Water & Waste Digest for the grit removal system installed as part of the…