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Hydro International

Hydro International, a CRH company, provides advanced products, services and expertise to help municipal, industrial and construction customers to improve their water management processes, increase operational performance and reduce environmental impact.

Hydro International can help water companies meet their AMP and environmental obligations, including the reduction of sewer overflows and the Water Industry National Environment Programme (WINEP).

Hydro International provides total solutions for Inlet Works, Combined Sewer Overflows (CSOs), Stormwater Management, Flood Warning and Prevention, and Water Resource management, from design to supply and installation through to ongoing preventative maintenance, servicing and emergency repair. These solutions include:

Hydrometric data collection, monitoring analysis and reporting for river level, reservoir, network and weather.
Continuous water quality monitoring for compliance with Section 82 of the Environment Act.
Water resource analysis and consultancy.
Stormwater management solutions, including options for Sustainable Drainage Systems. (SuDS) and Smart Maintenance.
CSO event duration monitoring.
CSO and storm tank treatment and screening.
Passive flow controls for flood prevention schemes, SuDS, CSOs and WwTWs.
Inlet works screening and grit removal solutions.
Sludge screening.
Dropping sewage or water safely from height.
Hire, repair and maintenance of inlet works screens and screenings handling equipment

Tamlaght WwTW (2025)

Transforming a challenging, constrained site into a modern, sustainable treatment facility, safeguarding waterways & enhancing the water quality of Upper Lough Erne

Ballyronan WwTW (2024)

A modern, sustainable wastewater treatment facility designed to meet increasingly stringent consents for discharging into Lough Neagh

Derrycrin WwTW (2024)

A challenging upgrade on a confined site providing sustainable treatment & environmental improvements to water quality in the Ballinderry River & Lough Neagh

Horsham New WwTW (2024)

Southern Water’s multi-million pound upgrade to boost the water quality of the River Arun and cater for the significant growth forecast

Ballygowan WwTW (2023)

Ballygowan is a small village situated in County Down, within the Ards & North Down Borough Council area. The towns of Comber and Saintfield are both approximately 4 miles to the north-east, and to the south respectively, with the city of Belfast 7 miles north-west. The 2021 Census indicates that the population of Ballygowan is […]

Blackburn and Darwen WwTWs (2022)

Both Blackburn WwTW and Darwen WwTW discharge final and storm effluent to watercourses that are tributaries of the River Darwen, feeding into the River Ribble estuary and the bathing waters of the Fylde coast in the Irish Sea. At Blackburn WwTW, which provides treatment for a population equivalent (PE) of approximately 400,000, construction of the […]

Carlisle WwTW (2022)

Carlisle WwTW lies within United Utilities’ north Cumbria region. The site is located to the north-west of Carlisle’s city centre, on the banks of the River Eden, and serves the city of Carlisle. The treatment works receives domestic sewage, trade flows, and tankered imports, providing primary and secondary treatment prior to discharge to the River […]

Blackburn and Darwen WwTWs (2021)

Blackburn WwTW was constructed in the 1960s and principally treats domestic crude sewage from the Blackburn catchment, with two major additional contributions; a high strength trade effluent from the InBev brewery and an ammonia rich return liquor flow from the sludge treatment plant. The key river water quality/water framework directive parameters within the revised environmental […]

Carlisle WwTW (2021)

Carlisle WwTW is in north Cumbria, which is part of United Utilities’ northern area. The site is located to the north west of Carlisle’s city centre, on the banks of the River Eden, and serves the city of Carlisle. The treatment works receives domestic sewage, trade flows, and tankered imports, providing primary and secondary treatment […]

SWELL - Warrenpoint WwTW (2021)

Warrenpoint is a small town in County Down, situated on the northern shore of Carlingford Lough, approximately 7 miles south-east of Newry. The shared water of Carlingford Lough marks the border between Northern Ireland and Ireland. Due to its scenic beauty and coastal location, Warrenpoint is popular with day trippers and the town can experience […]

Telscombe Lower Portobello PS & Screening Works (2021)

The original treatment works was built in the 1970s in an area carved out of the cliff face. It comprised a screening plant for grit and fat removal, before flows are pumped via a hand-dug long sea outfall 2.5km out to sea. This outfall replaced the original Victorian short sea outfall built in 1874, although […]

Blackburn and Darwen WwTWs (2020)

Blackburn WwTW, located at Samlesbury near Blackburn, serves a population equivalent (PE) of approximately 400,000 and discharges final and storm effluent to watercourses that are tributaries of the River Darwen, feeding into the River Ribble estuary and ultimately into the bathing waters of the Fylde coast in the Irish Sea. Over the last 12 months, […]

Barston STW (2019)

Barston Sewage Treatment Works (STW) is one of Severn Trent’s medium sized treatment works. The site is located to the east of Birmingham in the West Midlands. The STW treats foul water for the catchment serving Solihull, Shirley, Knowle and other outlying conurbations. It currently serves a population of 39,741 which will increase to 76,036. […]

Walsall Wood STW (2019)

Walsall Wood Sewage Treatment Works was a trickling filter site discharging into the Ford Brook, part of the River Tame catchment. Under the new Water Framework Directive, the site was required to comply with stringent new standards for phosphorus and ammonia levels in wastewater (BOD: 10 mg/l, NH3: 1.9 mg/l, Total P: 0.5 mg/l). The […]

Margate & Broadstairs Wastewater Pumping Stations (2017)

In 2008, Southern Water completed significant improvements to the wastewater treatment infrastructure serving the North Thanet catchments of Margate and Broadstairs to meet the requirements of the Urban Waste Water Treatment Directive. The existing marine head works at Joss Bay, Broadstairs and at North Foreland, Margate were upgraded to process screened flows and remove grit, […]

Portbury Wharf STW (2016)

Situated 2 miles from the coastal town of Portishead on the Severn Estuary, Portbury Wharf STW was granted its first consent to operate in 1987. The site underwent a refurbishment in late 2015 and currently services Portishead and the surrounding area, equating to a population in the region of 32,000. Portbury Wharf is comfortably equipped […]

Hydro International's UK Wastewater Services, M&N, cuts OPEX costs and carbon footprint

Greenham Common STW

MNSS combined screen protects a Thames Water treatment works from rag carry over

Hydro-Logic® Aquator

Hydro International announces a major upgrade to its water resource modelling software to help water companies plan more effectively for extreme drought events

Ground-breaking project leads to advanced wastewater grit removal system

Hydro International and the University of Exeter have completed a ground-breaking two-year research project to optimise the performance of the company’s advanced wastewater grit removal technology.