Water Cremation UK: What is Alkaline Hydrolysis and When Will England Legalise It?

Water cremation — also known as alkaline hydrolysis, resomation, aquamation, or bio-cremation — is a gentle, eco-friendly alternative to traditional flame cremation. On 2 March 2026, Scotland became the first part of the United Kingdom to legalise it. England, Wales, and Northern Ireland have not yet followed. This guide explains everything you need to know about water cremation and what families across the UK can expect next.

By the CremationCompare Team · Updated March 2026

What is Water Cremation?

Water cremation is a method of laying a body to rest that uses water, heat, and an alkaline chemical solution to gently dissolve soft tissue. The process is sometimes called alkaline hydrolysis (its scientific name), resomation (a brand name used by the company that pioneered the technology), aquamation, or bio-cremation.

The end result is similar to traditional flame cremation: the family receives bone ash, which can be kept, scattered, or buried as they choose. But how you get there is very different — and advocates say far kinder to the planet.

Water cremation has been legal in parts of the United States and Canada since the early 2000s and is now available in over 25 US states. It has also been used commercially in some South African provinces. Scotland's landmark decision in March 2026 marks the first time a UK nation has crossed this threshold.

How Does Alkaline Hydrolysis Work?

The process is carried out inside a specialist stainless steel vessel called a hydrolysis chamber. Here is what happens, step by step:

1. The body is placed in the chamber in a biodegradable shroud or container. Metal implants (such as pacemakers, hip replacements, or titanium screws) can remain — they are recovered and recycled afterwards.
2. An alkaline solution is added. This is typically a mixture of approximately 95% water and 5% potassium hydroxide (also known as lye or caustic soda), a naturally occurring alkali.
3. Heat and pressure are applied. The chamber is heated to around 150–180°C under pressure, which accelerates the natural decomposition process. The process takes approximately 4 to 8 hours.
4. Soft tissue dissolves. Proteins, fats, and other soft tissue break down into a sterile, brown liquid. This liquid — sometimes called the "effluent" — is safe to release into the standard wastewater system, just like water from a hospital or mortuary.
5. Bones are rinsed and processed. The remaining bone structure is rinsed with clean water, then dried and ground into a fine white or ivory-coloured powder — the "ashes" — which are returned to the family.

The entire process takes place at a licensed facility. Families are not present during the process, much like a standard direct cremation. A memorial service can still be arranged separately, at a time and place of the family's choosing.

Benefits of Water Cremation Compared to Flame Cremation

Proponents of water cremation highlight several significant advantages over traditional flame cremation:

Environmental impact

This is the headline benefit. Flame cremation produces roughly 150–400kg of CO₂ per cremation and uses significant amounts of natural gas. Water cremation, by contrast, is estimated to produce approximately 90% less carbon emissions than flame cremation. It uses substantially less energy and produces no airborne pollutants such as mercury (which can be released when amalgam dental fillings are incinerated).

Greater volume of ashes returned

Water cremation typically returns 20–30% more ash than flame cremation. This is because water-based decomposition leaves more of the bone mineral matrix intact, whereas flame cremation incineration destroys more of the bone.

No atmospheric emissions

There is no chimney, no smoke, and no particulate matter released into the air. This makes water cremation more compatible with urban locations and reduces concerns about air quality near crematoria.

Perceived as more gentle

Some families find comfort in the idea that the body is dissolved by water and warmth — processes that mirror natural decomposition — rather than by fire. This is a personal and emotional consideration, not a scientific one, but it matters to many people.

Medical implants and protheses

Metal implants survive the process intact and can be recovered and ethically recycled, which is more difficult with flame cremation.

Water Cremation vs. Flame Cremation vs. Natural Burial

Here is how the three main eco-conscious end-of-life options compare across the key factors most families consider:

Current Legal Status Across the UK

The legal position on water cremation varies by nation within the United Kingdom. Here is where things stand as of March 2026:

Scotland ✓ — Legal from 2 March 2026

Scotland became the first country in the UK to legalise water cremation when the Burial and Cremation (Scotland) Act provisions for alkaline hydrolysis came into force on 2 March 2026. The Scottish Government consulted extensively with funeral industry bodies, environmental groups, and the public before amending existing burial and cremation legislation. Providers in Scotland are now able to apply for licences to operate hydrolysis facilities.

England — Not yet legal

Water cremation is not currently legal in England. Cremation in England and Wales is governed by the Cremation Act 1902 and subsequent regulations, which specify flame cremation only. Any change would require primary legislation or a significant amendment to the Cremation Regulations 2008. The Ministry of Justice, which oversees cremation law in England and Wales, has not yet announced a timetable for legislative reform.

Wales — Not yet legal

Cremation law in Wales is governed by the same legislation as England (the Cremation Act 1902 and 2008 regulations). Wales has not introduced separate legislation on alkaline hydrolysis. There are no current announcements from the Welsh Government on this matter.

Northern Ireland — Not yet legal

Northern Ireland operates under its own cremation regulations. Alkaline hydrolysis is not currently permitted, and no legislative changes have been announced.

When Might England Legalise Water Cremation?

This is the question on many people's minds — and the honest answer is: there is no confirmed timetable. However, there are reasons to be cautiously optimistic.

Factors that could accelerate legalisation

• Scotland's precedent — Having a neighbouring UK nation successfully regulate and license water cremation removes much of the political uncertainty. Scotland's experience will provide a regulatory template.
• Environmental targets — The UK Government has committed to net zero by 2050. Around 78% of UK deaths result in cremation, making the deathcare sector a non-trivial source of emissions. Greener alternatives will inevitably attract policy attention.
• Growing public awareness — Coverage in the BBC, Guardian, and national press following Scotland's announcement has significantly raised public awareness. As families become more eco-conscious about their end-of-life choices, demand will grow.
• Industry readiness — Companies such as Resomation Ltd (a UK-based pioneer of the technology) have been lobbying for legislative change in England for over a decade. Equipment, training, and commercial models are ready to go.

Likely timeline

Legislative reform in England tends to move slowly, particularly on matters governed by nineteenth-century statutes. Realistically, the most likely pathway is:

1. Government consultation (could begin in 2026–2027)
2. Draft legislation or amendment to regulations (2027–2028)
3. Licensing and regulatory framework (2028–2029)
4. First facilities operational in England (2029 or beyond)

This is speculative — things could move faster or slower depending on political priorities. We will update this guide as new information emerges.

What Will Water Cremation Cost in the UK?

Because water cremation is not yet available in England, Wales, or Northern Ireland, there are no established UK market prices outside Scotland. However, we can make some informed observations:

• In the US, where the service is well-established, water cremation typically costs $1,500–$3,500 (approximately £1,200–£2,800), slightly more than flame cremation due to the specialist equipment required.
• In the UK, the cost of a standard direct cremation currently ranges from £895 to £1,595. Water cremation is likely to be priced above this range, at least initially, while the market is small and capital costs are high.
• As more facilities open and competition increases — as happened with direct cremation in England over the past decade — prices are likely to fall. When direct cremation first became widely available, it cost around £2,000–£3,000; today, the cheapest providers charge under £900.

Our best estimate, when water cremation eventually becomes available in England, is an initial price range of approximately £1,500–£3,000, falling over time as the sector matures.

Frequently Asked Questions

What is the difference between water cremation and alkaline hydrolysis?

They are the same process, just different names. "Water cremation" is the plain-English term used by funeral providers and the media. "Alkaline hydrolysis" is the scientific term used by regulators and researchers. You may also hear it called resomation, aquamation, or bio-cremation — all describe the same method.

Is water cremation legal in the UK?

As of March 2026, water cremation is legal only in Scotland, following legislation that came into force on 2 March 2026. It remains illegal in England, Wales, and Northern Ireland, where no equivalent legislation exists.

What happens to the liquid produced during water cremation?

The sterile liquid produced — known as "effluent" — is safe and can be released into the standard municipal wastewater system. It has a similar composition to the water released by hospital mortuary processes. It is not hazardous and undergoes further treatment at wastewater facilities, just like any other household or industrial water discharge.

Can you still have a funeral service with water cremation?

Yes. Just like a direct cremation, water cremation involves no ceremony at the facility itself. Families are free to arrange a separate memorial service, celebration of life, or scattering ceremony at any time and any location they choose.

Is water cremation more eco-friendly than direct cremation?

Yes, significantly. Water cremation produces approximately 90% less carbon than flame cremation, uses less energy, and produces no atmospheric emissions. Both are far more environmentally friendly than a traditional funeral with embalming and burial in a lined coffin.

Can I pre-arrange water cremation in England?

Not currently, as no provider in England is licensed to carry out alkaline hydrolysis. However, you can document your wishes in a letter of wishes or in a prepaid funeral plan noting your preference for water cremation when it becomes available. Speak to a direct cremation provider about flexible planning options.

How much ash is returned with water cremation?

Families typically receive around 20–30% more ash from water cremation compared to flame cremation. This is because the water-based process preserves more of the bone mineral matrix. The ash is white or ivory in colour and can be kept, scattered, or buried in the same ways as ash from flame cremation.

What happens to metal implants during water cremation?

Metal implants — including hip replacements, pacemakers, titanium screws, and dental metal — are not dissolved by the alkaline hydrolysis process. They are recovered after the process and can be recycled ethically, typically through specialist programmes. No removal prior to the procedure is necessary.

Further Reading

• What is Direct Cremation? A Complete UK Guide
• How to Compare Direct Cremation Providers
• Planning Ahead: Pre-Arranging a Direct Cremation
• Pure Cremation — Provider Review
• Direct Cremation UK — Provider Review

This guide is for informational purposes only. CremationCompare is an independent comparison service and is not affiliated with any cremation provider. All legal information is accurate as of March 2026 and subject to change. Always verify the current legal position with a qualified funeral director or legal adviser.