Delivering Section 82: Turning regulatory duty into opportunity for the water sector

The UK water sector is at a defining moment. Regulation, innovation and public expectation are converging, bringing both pressure and possibility. At the centre of this shift is Section 82 of the Environment Act 2021, which mandates continuous, near real time monitoring of water quality around storm overflows and wastewater treatment discharges.

It’s important to recognise that this is not simply a compliance exercise. It’s a genuine opportunity to improve river health, rebuild public trust and accelerate the digital transformation of critical national infrastructure.

Why Section 82 matters

For many years, water quality monitoring relied on periodic sampling and manual testing. While valuable, this approach only ever provided snapshots in time. Section 82 changes that fundamentally.

Although the Environment Act applies across the UK, Section 82 places duties specifically on wastewater operators in England. The Act requires them to continuously monitor key water-quality parameters including dissolved oxygen, pH, temperature, turbidity and ammonia, both upstream and downstream of storm overflows and treatment works that discharge into watercourses (rivers, streams or estuaries). Monitoring must also increase in frequency during high-risk periods, with data published in near real time in line with DEFRA’s programme guidance. Alongside this, Event Duration Monitoring (EDM) discharge data already published within one hour on company maps and the National Storm Overflow Hub, provides the complementary picture of spill frequency and duration, helping distinguish between event-based transparency (EDM) and the new continuous water-quality transparency introduced by Section 82.

This shift delivers a step change in transparency. Continuous data allows regulators, operators and communities to see what is happening in rivers as events unfold, rather than weeks later. Over time, this visibility is essential to restoring confidence in a sector under intense scrutiny and public concern.

The scale of the challenge

The scale of delivery is significant. England alone has more than 14,000 storm overflows; many located in remote or difficult environments. Each monitored site can generate tens of thousands of data points every year.

A single high priority location reporting every 15 minutes produces more than 35,000 readings annually. Multiply that across thousands of assets and Section 82 quickly becomes a challenge of digital infrastructure, data management and operational integration, not just sensor deployment.

This is happening against a backdrop of heightened awareness. In 2023, storm overflows across England and Wales discharged hundreds of thousands of times, driven by improved monitoring and extreme weather.

The data is now visible. The next challenge is ensuring it leads to meaningful action and long-term improvement.

Innovation at the heart of compliance

Meeting the requirements of Section 82 is not about technology for technology’s sake. The real value lies in turning raw data into insight that supports better decisions.

Advances in sensor technology, IoT platforms, cloud analytics and artificial intelligence are enabling utilities to move from reactive responses to predictive and preventative approaches. Continuous monitoring supports earlier intervention, improved asset performance and a deeper understanding of catchment behaviour during storm events.

For MARCH, this approach is well established. With more than 20 years of experience in systems integration, automation and operational technology, the business has long supported national utilities in modernising and securing critical infrastructure.

Jeroen van Alstede MIET, Director at MARCH, sees Section 82 as a catalyst rather than a constraint.

Section 82 should not be seen as a box-ticking exercise,” he says. “It is an opportunity to fundamentally improve wastewater treatment and its environmental performance. By combining robust monitoring with digital integration and analytics, utilities can turn compliance into long-term resilience, stronger performance and better outcomes for the environment.”

Delivering at scale with United Utilities 

MARCH’s role on multiple Water Utility Frameworks including United Utilities’ Monitoring and Control Systems Integration framework demonstrates how the industry can deliver the scale, resilience and data quality Section 82 now requires. From FEED through to full lifecycle optimisation, MARCH supports real-time visibility and automated control across a network serving over seven million people. This experience shows how Section 82’s requirements for continuous, transparent monitoring can be met efficiently when engineering, automation and digital capability are integrated from the outset.

Lessons for the sector

As the industry moves towards the 2035 deadline for full implementation, several lessons are already clear.

Collaboration is essential. Utilities, regulators, technology providers and landowners all play a role, and progress depends on coordinated delivery and shared learning.

Data quality matters more than data volume. Monitoring must be reliable, contextualised and presented in ways that support understanding and action, not misinterpretation.

Future-proofing is critical. Technology decisions made today must support long-term operability, cyber security, sustainability and value for money, avoiding costly retrofits later.

A catalyst for change

Section 82 is one of the most significant regulatory shifts the water sector has faced in decades. While the challenge is substantial, the opportunity is even greater.

Done well, continuous water quality monitoring can drive better environmental outcomes, stronger public confidence and more resilient infrastructure. For organisations like MARCH, the focus is on helping customers move beyond compliance and towards capability.

By integrating engineering excellence with digital innovation, Section 82 becomes not just a legal requirement but a catalyst for meaningful and lasting change across the UK’s water networks.

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External links:

Environment Act 2021 and Section 82 overview, including parameters and monitoring intent 

Adler and Allan overview of Section 82 requirements and challenges

Proteus Instruments explainer on Section 82 and continuous water quality monitoring 

UK Government guidance on storm overflows and wastewater assets

Environment Agency data and context on storm overflows 

Sand Technologies insight on Section 82, AI and large scale data handling

Additive Catchments overview of Section 82 and continuous monitoring