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Environmental specialists for water and wastewater companies

Trusted to prevent pollution, protect scarce resources, and deliver compliance.

Consultative asset management, surveying, monitoring, and asset installation, maintenance, and remediation

Together with our specialist companies, Aqua Consultants, QEM Solutions, Detectronic, Jet Aire, Public Sewer Services, Oneline, and the water quality and ecology division, we provide full turnkey solutions to UK (and international) water companies to help them reduce pollution, manage water resources, manage climate change, increase biodiversity, and transition to new energy. We do this through infrastructure investment strategy, data and analytics, frontline operational capability, and environmental consultancy.

Customer challenges

Added value

Our services

Strategic asset consultancy

Through Group company Aqua Consultants, we help customers understand and optimise their assets with strategic support around capital projects, business plans and investments through asset creation and optimisation.

Monitoring and telemetry

Through Group company Detectronic, we provide data to understand your network to respond to today’s issues such as pollution events, blockages, and overflows, and provide input into strategic asset planning.

Water quality monitoring

Through Group company OHES we provide planned and reactive water quality monitoring and environmental remediation following pollution and contamination events.

Drainage surveys and diagnostics

An OS19X-qualified team provides a comprehensive overview of your infrastructure, primary pollution sources, and emerging issues. CCTV surveys remotely diagnose existing or longer-term drainage problems, including collapsed drains, concrete or grout accumulation, cracked or displaced pipes, and root intrusion.

Planned preventive maintenance

Through Group companies Jet Aire and Oneline, we provide PPM and response services to keep water and sewage networks flowing, with asset diagnostics, and market leading technology ensuring optimum availability.

Emergency response

24/7-365 fast and effective oil and fuel spill clean-up to protect the environment and your operations. Our mechanical and chemical aeration services can replace much needed oxygen to a waterbody in the event of a pollution incident.

Energy transition

We provide a range of energy auditing, asset maintenance, decommissioning and infrastructure installation services to help you reduce your carbon usage and meet and exceed your Net-Zero targets.

Why Adler & Allan?

Value for money

We are a single partner with combined capabilities in both advisory and practical engineering solutions, meaning you can achieve efficiencies, value for money and buy-in from your stakeholders and shareholders.

Pollution prevention

Our unique history in pollution and response as well as a rigorous approach to standards, quality, and 24/7, nationwide capability gives you the evidence you need to comply with regulation, reduce the risk of prosecution, and enhance your environment.


Through our innovation, capabilities, reliability, specialist expertise, and deployable assets we can help position you as a responsible ESG player, enhancing your reputation in the industry.


We know that your supply chain is key to you achieving Net-Zero by 2030, so we have a range of initiatives to track, report and reduce our carbon emissions in the Group.


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Relevant training

  • MSCC5 CCTV Surveyor trained  
  • Water Association - High Pressure Jetting
  • Confined Space trained - Medium or High Risk
  • Rescue Team Training
  • Unit 2 and 10 Streetworks and road signs
  • Cable Avoidance Trained
  • Safe Contractor Certificate
  • No PS 4253
  • CompEx trained electricians

Key stats

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  • 0
    engineering and water specialists in-house.
  • 0km+
    of drainage surveyed and remediated.
  • 0km+
    of watercourses assessed for key quality indicators.
  • 0bn+
    data points collected every year.
  • 0
    complex underground infrastructure projects completed.

Key contacts

Mike Williamson MBE

Managing Director, Water Services

Simon Jefferson

Water Sector Director

Chris Morgan

National Account Manager

Contact a sector expert

If you'd like to get in touch with a sector expert, please leave your details and a member of the team will be in touch.

Keep your business compliant and protect the environment while reducing the risk of operational downtime

Adler and Allan reduce your risk and support you on your journey to Net-Zero through the management and maintenance of assets.