Norfolk is surrounded by water. We have the Broads, rivers, drains, marshes, beaches and a coastline that seems to run forever.

So it is fair to ask why residents are being told to save every drop while thousands more homes are planned across the county.

Anglian Water’s temporary use ban came into force across its region on 11 July 2026.

The Environment Agency’s latest dry-weather report says the company’s Norfolk, Norwich and Broads water-resource zone remains at drought level one.

The same report says the ban was introduced after months of dry and hot weather, falling river and groundwater levels, and a sharp rise in demand.

That does not mean Norfolk is about to run out of drinking water. It does mean the margin between what is available and what people need is under pressure.

At the same time, housing growth is not a small or distant idea.

The adopted Greater Norwich Local Plan sets a requirement for 40,541 homes between 2018 and 2038.

The wider Norfolk planning framework now records a higher local housing need under the Government’s updated calculation, with Norfolk’s figure listed at 5,939 homes a year.

Growth is being planned around places including Norwich, Rackheath, Long Stratton, Wymondham, Aylsham, Acle, Reepham and other towns and villages across the county.

North Norfolk adopted a new local plan in December 2025, setting out development and infrastructure priorities through to 2040.

Greater Norwich authorities have also begun work on a new plan looking towards 2045.

The question is not whether Norfolk needs homes. It plainly does.

The question is whether water supply, sewage treatment and drainage capacity are being demonstrated clearly enough before major schemes are approved.

What the evidence says

Anglian Water is not pretending the challenge does not exist. In April 2026, it announced around £1 billion of investment in Norfolk by 2030.

That includes major upgrades at Whitlingham Water Recycling Centre, which serves the wider Norwich area, work to reduce storm-overflow spills, and sections of a strategic pipeline intended to move water towards drier parts of the region.

The company’s Drainage and Wastewater Management Plan looks ahead to 2050.

It assesses the impact of population growth, climate change, intense rainfall and flooding on almost 600 water-recycling catchments.

Anglian Water says the plan could require up to £5 billion of investment across its region over the next 25 years.

But “investment is planned” is not the same as “every proposed development has capacity today”.

A Greater Norwich infrastructure response submitted to the Planning Inspectorate identified future wastewater-capacity issues in the catchments serving Aylsham, Foulsham, Long Stratton, Reepham, Rackheath, Diss, Ditchingham, Saxlingham, Whitlingham Trowse and Woodton.

It said some of these issues should be addressed through Anglian Water’s long-term plan, but that revisions might still be needed as the housing proposals were finalised.

Anglian Water’s own long-term drainage plan also identifies the possibility of a new water-recycling centre west of Norwich, depending on the eventual level and location of growth.

That is important. It shows that capacity is being modelled and investment is being designed.

It also shows that the answer is not always a neat yes or no.

 In some places, the system may cope after upgrades. In others, the timing, location and scale of development may determine whether it copes.

Sewage is the other half of the problem

Water supply gets the headlines during a hot summer. Wastewater is less visible until a drain backs up, a river is polluted or a storm overflow spills.

Norfolk’s planning system already recognises that new housing can affect protected water environments.

In parts of the River Wensum and Broads catchments, developers must show that schemes will not add harmful nutrient pollution, or must provide mitigation. 

Norfolk councils say planning permission cannot be granted for affected developments until suitable mitigation is in place.

The Government’s nutrient-neutrality guidance says calculations now take account of planned wastewater-treatment improvements between 2025 and 2030.

That helps explain why some developments can move forward with mitigation or future upgrades built into the assessment.

 It does not remove the need to understand what happens before those improvements are complete.

There is also a drainage question. Norfolk is flat, heavily drained and vulnerable to both drought and flooding.

Anglian Water says much of its region faces intense and erratic rainfall, groundwater pressures, ageing infrastructure and sewer systems that can be overwhelmed when rainwater enters networks designed for foul sewage.

For residents, the practical test should be simple enough to understand.

Before a major housing scheme is approved, can the responsible bodies show:

• where the drinking water will come from in a dry summer;

• whether the local network has enough pressure and treatment capacity;

• which sewage works will receive the additional flow;

• what upgrades are required, who is paying for them and when they will be finished;

• how surface water will be managed during extreme rainfall;

• what happens if homes are occupied before the promised infrastructure is ready?

Those are not anti-development questions. They are pro-planning questions.

The uncomfortable bit

There is a temptation to treat infrastructure as something that can be added later: approve the homes first, then widen the pipe, expand the treatment works or find the flood-storage land afterwards.

Sometimes that may be the only workable approach.

 Large infrastructure takes years to design, fund and build. Developers, councils and water companies also work to different timetables.

But the public should not have to piece together the answer from planning documents, consultation reports and company investment plans.

 If a development depends on a future upgrade, that should be obvious. If capacity is available only up to a certain number of homes, that should be obvious too.

If the risk is being managed through nutrient credits, sustainable drainage or phased construction, residents should be able to see how.

The case for new homes is strongest when the supporting infrastructure is treated as part of the development, not as a promise made somewhere else.

Norfolk’s water debate is not really about whether we have rivers on the map.

It is about whether we have enough treated, deliverable and resilient water infrastructure where people will live in the dry summers and violent downpours that are becoming harder to plan around.

So here is the question for Norfolk readers: should water supply, sewage treatment and drainage capacity be proven before major housing developments receive approval?

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