Every year, the UK water sector spends significant time and money trying to persuade people to use less water. Campaigns, leaflets, home visits, smart meter dashboards with colour-coded usage graphs. All of it well-intentioned. Some of it useful. But how much really lands?

And yet, per capita consumption in England has barely moved in two decades. We were using around 145 litres per person per day in the early 2000s. We’re still using around 145 litres per person per day now. Meanwhile, Ofwat’s AMP8 targets require water companies to drive that figure down to 110 litres by 2050 and crucially, this isn’t just a target. The Environment Act 2021 makes it a statutory requirement, a reduction of roughly 25%.

Something isn’t adding up.

It’s not that awareness campaigns are limited in what they can achieve. They aren’t. But they have a fundamental structural problem: they don’t scale in the same direction as the challenge.

Why Awareness Doesn’t Scale

The UK’s water-stressed regions are growing. Population projections, climate change and decades of underinvestment in supply infrastructure mean that the gap between demand and available resource is widening and widening faster in the places that are already most constrained. The sector is already staring down a 5 billion litre per day gap between supply and demand, a gap that’s growing faster than most people realise.

To close that gap through behaviour change alone, you’d need a very large number of households to make consistent, lasting changes to deeply ingrained daily habits. And to sustain those changes indefinitely, without prompting, regardless of whether they’re tired, busy, distracted or simply not thinking about water at that particular moment. Or even because water, relative to most household bills, still feels cheap enough not to think about.

We know from decades of public health evidence that behaviour change alone isn’t enough. People respond to campaigns in the short term. Habits drift back. Without constant reinforcement, gains fade. The evidence suggests that campaigns work best when they’re supported by infrastructure that delivers savings regardless-  so that even when customers forget, the system doesn’t. We’ve already looked at this, even targeted home audit programmes – which are resource-intensive and expensive – struggle to deliver durable savings at any meaningful scale in isolation.

That’s not an argument against awareness. It’s an argument for giving awareness a stronger foundation to build on.

What Scaled Intervention Actually Looks Like

If you want to reduce consumption across millions of households, you need an intervention that works across millions of households – simultaneously, reliably and without depending on each individual making a conscious choice every day.

That means infrastructure.

The NRv2 LoFlo® is a compact flow regulator that sits between the water meter and manifold, controlling the rate of water entering a property at a set level regardless of network pressure fluctuations. It reduces per capita consumption by up to an average of 4.67% annually in real-world rollout and significantly more where deployed in higher-pressure areas or targeted at higher-usage properties. Not because the occupant has changed what they do – in most cases, they haven’t changed all that much. They’re taking the same showers, running the same dishwasher cycles, filling the same kettle. LoFlo doesn’t ask them to. It works with existing habits, not against them which means it delivers whether or not the awareness campaign has landed, whether or not the smart meter dashboard has been checked, whether or not the customer even knows the device is there.

What really matters is what it looks like at scale.

A water company with a million metered properties deploying LoFlo across its network isn’t running a behaviour change campaign. It’s engineering a system-level shift. The savings don’t degrade when a campaign ends. They don’t require re-engagement or repeat investment. They don’t disappear when a homeowner stops reading their usage dashboard. They accumulate steadily across the entire estate.

The Maths the Sector Needs to Have

Ofwat’s PCC targets require measurable, reportable reductions that can be verified year on year. Behaviour change programmes are notoriously difficult to attribute and even harder to forecast. Did consumption fall because of the campaign or because it rained more, or because energy prices went up and people took shorter showers to save on hot water bills?

Infrastructure-led savings are different. A LoFlo installed at a property is a known quantity. Its performance characteristics are certified. Its lifespan – 15 to 25 years – is documented. The savings it delivers are predictable, auditable and independent of occupant behaviour. For a regulatory environment that is increasingly focused on measurable outcomes, that predictability is a fundamental advantage.

This is exactly why Severn Trent chose LoFlo as part of their AMP8 water efficiency programme – recognising both the technical performance and the ability to deliver at the scale their network demands. When you’re managing one of the UK’s largest water regions, you need solutions you can model, forecast and report against with confidence.

The Reach Problem

There’s another dimension to this that doesn’t get discussed enough: the sheer number of properties that behaviour change programmes will never reach.

Home audit programmes are valuable but they depend on customers agreeing to an appointment, allowing access, accepting the installation of new fittings and then using those fittings correctly. At every stage, there’s potential friction. At every stage, you lose households. In practice, even well-funded programmes reach a fraction of the properties they target.

LoFlo can be installed at the meter point – externally, without access to the property – and timed to coincide with meter exchange programmes that are already happening. The customer doesn’t need to do anything. The savings happen anyway.

For water companies trying to move the needle on PCC across entire regions, this isn’t a marginal benefit. It’s the difference between a programme that reaches 10% of your customer base and one that can, in principle, reach all of it.

Not Either/Or. But Let’s Be Honest About What Works

None of this means customer engagement is pointless. Smart meter data is genuinely useful. Awareness campaigns build the social context that makes water efficiency feel like a shared responsibility. Education has long-term value.

But they cannot carry the full weight of AMP8 PCC commitments. They were never designed to. And continuing to treat behaviour change as the primary lever – rather than one of a number of measures that will be needed – means the sector will keep missing its targets while the infrastructure gap continues to widen.

The water efficiency challenge is a numbers problem. LoFlo® is, among other things, a numbers solution – one that works at the same scale as the problem itself, without asking anything of the people it serves.

That’s not just a nice property for a product to have. In the context of what the sector is trying to achieve by 2050, it might be the most important one.  And, per litre of demand reduction delivered, arguably the most cost-effective tool the sector has available.

Interested in how LoFlo® could fit into your AMP8 delivery planning? Get in touch with the Groundbreaker team.