Water cremation (alkaline hydrolysis) in the UK¶
Until 2 March 2026, families in the UK had two legally-recognised options for the disposal of a body: burial or flame cremation. From that date, Scotland became the first part of the UK to permit a third — alkaline hydrolysis, popularly known as water cremation. The change came into effect under the Hydrolysis (Scotland) Regulations 2026, made under the Burial and Cremation (Scotland) Act 2016. It is the first new statutorily-recognised disposal method in the UK since the Cremation Act 1902. [source: legislation-gov-uk/hydrolysis-scotland-regulations-no1-2026-2026-05-02.html]
The law is in place. Operational facilities are not — providers need planning permission, a Scottish Environment Protection Agency (SEPA) discharge consent, and the regulatory authorisations set out in the Regulations. The Scottish Government estimates a six-to-nine-month gap to the first operational facility; late 2026 to early 2027 is the realistic window. England, Wales, and Northern Ireland have not legalised the method, although the Law Commission is actively consulting on funeral-law reform that could include it.
This guide covers what alkaline hydrolysis is, how it differs from flame cremation, what families can reasonably expect on cost, and the current position in each UK jurisdiction.
If you can only do one thing today: if you are arranging a funeral in Scotland and want to know whether alkaline hydrolysis is yet a real option, ask your funeral director. As of May 2026 the answer is no in practice, but funeral directors track the planning applications and will know the local timeline.
What is alkaline hydrolysis?¶
Alkaline hydrolysis is a process for disposing of human remains using hot water and a small quantity of an alkaline solution to break down soft tissue. The body is placed in a sealed pressurised chamber with a mixture that is roughly 95% water and 5% potassium hydroxide. The mixture is heated to around 160°C and held for between four and six hours.
What remains at the end is bone material, which is dried and processed into a fine white powder. This powder is returned to the family in an urn — handled the same way as ashes from a flame cremation. The liquid byproduct is sterile, contains no DNA or pathogens, and is released as treated wastewater under the same regime as any other water-treatment process.
The process is not new — it has been in commercial use for over a decade in the United States (legal in 28 states), Canada, the Republic of Ireland, South Africa, Australia, and New Zealand. The Scottish regulations bring the UK into line with those existing regimes.
How it differs from flame cremation¶
| Flame cremation | Alkaline hydrolysis | |
|---|---|---|
| Temperature | 800°C to 1,000°C | around 160°C |
| Duration | around 90 minutes | 4 to 6 hours |
| Process | combustion in air | dissolution in alkaline solution |
| Energy use | high | substantially lower |
| Airborne emissions | yes (including mercury vapour from dental amalgam) | none |
| Implants and pacemakers | destroyed; pacemakers must be removed beforehand | survive intact; pacemakers do not need to be removed; metals can be recycled |
| Remains returned | grey ash | white powder, slightly larger volume |
| Liquid byproduct | none | sterile treated water |
For families, the experience is closer to flame cremation than to burial: the body is taken to a facility, the process happens out of sight, and the remains are returned in an urn for scattering, burial, or retention at home. The differences are mostly upstream — energy use, emissions, what happens to medical implants — and downstream the family receives a comparable container of remains.
What it is likely to cost¶
Scottish facilities have not yet published prices because none are operational. Prices below are based on data from US, Canadian, and other international markets where alkaline hydrolysis is established, plus comparable Scottish costs for flame cremation and burial. They should be read as an order-of-magnitude indication, not a quote.
| Element | Likely range | Notes |
|---|---|---|
| Facility fee (alkaline hydrolysis) | £800 to £1,200 | Estimated from international markets |
| Funeral director's fees | £800 to £1,500 | Comparable to flame cremation |
| Biodegradable coffin or container | £100 to £400 | The body must be in a container suitable for the chamber |
| Estimated total | £1,700 to £3,100 | |
| [source: gov-scot/alkaline-hydrolysis-consultation-analysis-2026-05-02.html] |
For comparison, current Scottish costs for the existing options:
| Option | Typical total |
|---|---|
| Direct cremation (no service) | £740 to £1,600 |
| Flame cremation with service | £2,100 to £3,600 |
| Burial with service | £3,700 to £7,700+ |
| [source: mygov-scot/burial-cremation-hydrolysis-costs-2026-05-02.html] |
The honest framing is that alkaline hydrolysis is unlikely to be the cheapest option — direct cremation will retain that position — but should sit between direct cremation and a flame cremation with service. Families choosing it primarily on cost will usually still find direct cremation cheaper. Families choosing it on environmental grounds, or because they prefer the process, will pay a modest premium over direct cremation but probably less than a flame cremation with service.
When will it actually be available?¶
Three things have to happen before the first Scottish family can choose alkaline hydrolysis in practice:
- Planning permission for a hydrolysis facility — granted by the local planning authority in the area where the facility will be sited. This is the longest single step; major facility applications can take 12 months or more.
- SEPA discharge consent for the wastewater — the Scottish Environment Protection Agency licences the discharge of the sterile liquid byproduct under the Water Environment (Controlled Activities) (Scotland) Regulations 2011.
- Authorisation under the Hydrolysis (Scotland) Regulations 2026 — the regulatory authorisations equivalent to the licensing of a crematorium.
The Scottish Government estimates the combined timeline at six to nine months from 2 March 2026, putting the first operational facility somewhere between late 2026 and early 2027. That estimate assumes a provider has already done preparatory work — by May 2026 at least one provider is publicly committed to opening a Scottish facility, but no facility has yet received all three permissions.
Families arranging funerals now in Scotland cannot select alkaline hydrolysis as a real-world option. The funeral director route is the right one for tracking when that changes — the industry will know months before facilities open which providers are progressing through planning.
What about England, Wales, and Northern Ireland?¶
Alkaline hydrolysis is not currently legal in England, Wales, or Northern Ireland. The position in each:
England and Wales — the Law Commission is consulting on a wider reform of funeral law, including the disposal regime, with a draft bill expected in due course. The current statutory framework — the Burial Act 1857, the Cremation Act 1902, and various subsequent regulations — does not contemplate alkaline hydrolysis, and primary legislation would be needed to add it. Scotland having moved first creates an evidence base on safety and regulatory practicality. There is no firm timeline; "years rather than decades" is the realistic frame as of May 2026.
Northern Ireland — would need its own primary legislation through the Northern Ireland Assembly. No current proposal.
There is no legal route for an English, Welsh, or Northern Irish family to choose alkaline hydrolysis for a relative in their own jurisdiction. A small number of families have used Republic of Ireland providers, where the method has been available for some years, but this involves the same logistical challenges as any cross-border funeral arrangement and is not common.
Religious and cultural views¶
The method is new enough that not every UK faith community has issued formal guidance. The position as of May 2026:
- Church of Scotland — did not object during the legislative process and accepts the method as a permitted disposal route for members.
- Church of England, Roman Catholic, and other Christian denominations — most have not yet issued formal positions. Catholic teaching has been clarifying its position on cremation over recent decades; alkaline hydrolysis is likely to be treated similarly to flame cremation rather than as burial.
- Islam — traditional Islamic practice requires burial, not cremation in any form. Alkaline hydrolysis is likely to be treated in the same category as flame cremation rather than as a permitted alternative to burial.
- Orthodox Judaism — likewise requires burial; alkaline hydrolysis is likely to be regarded as a form of cremation and therefore not permitted.
- Hinduism and Sikhism — both traditions favour cremation, and alkaline hydrolysis is likely to be widely accepted, but specific guidance from individual communities and authorities will vary.
- Humanist and non-religious — generally supportive, with environmental considerations often a positive factor.
For any family where faith or cultural tradition matters, the right step is a conversation with the relevant religious leader before the funeral arrangements are committed. The novelty of the method means published guidance is thinner than for burial or flame cremation; specific case-by-case advice is more reliable.
What changed in Scottish burial law at the same time¶
The same legislative programme that introduced alkaline hydrolysis also reformed the exclusive right of burial regime in Scotland. Since 1 March 2026:
- A new burial right has a statutory 25-year tenure (replacing the patchwork of locally-set durations).
- The right holder can apply for 10-year extensions, indefinitely renewable.
- Rights that are not extended at the end of a term are extinguished, and the lair may be resold by the burial authority.
- These changes are not retrospective — burial rights granted before 1 March 2026 keep their original terms.
[source: legislation-gov-uk/burial-cremation-scotland-act-2016-2026-05-02.html]
This change is unrelated to the choice of disposal method but matters to families holding existing rights and to families considering future arrangements. See Burial rights in the UK for the wider picture.
Choosing between flame cremation, alkaline hydrolysis, and burial¶
There is no objective right answer. The trade-offs that matter for most families:
Choose alkaline hydrolysis if the environmental difference matters to the family or to the wishes of the person who died, the family is comfortable with a less familiar process, the cost difference against direct cremation is acceptable, and a Scottish facility is operational by the time the funeral happens.
Choose flame cremation if familiarity matters, an early funeral date is a priority (no facility-availability question), or the family's faith tradition specifically permits cremation but has not yet considered alkaline hydrolysis.
Choose burial if the family wants a permanent identifiable memorial (whether in a churchyard, council cemetery, or natural burial ground), faith tradition requires it, or the long-term presence of a grave matters to surviving family.
Most families in Scotland will continue to choose flame cremation or burial in the near term simply because alkaline hydrolysis facilities are not yet open. As facilities become operational, the choice will become real for those who want it.
What this guide doesn't cover¶
- Burial rights and choices — see Burial rights in the UK.
- Flame cremation and the funeral arrangements — see Arranging a funeral and Funeral costs.
- Faith-specific funeral practice — Muslim, Jewish, Hindu, Sikh, and Catholic guides are in development.
- Death abroad — see When someone dies abroad.
- Specific facility operators in Scotland — there are no operational facilities to list as of May 2026; the position will change over the next 12 months.
If you're struggling, you don't have to do this alone. Samaritans (116 123, 24/7) | Cruse Bereavement Care (0808 808 1677) | Mind (0300 123 3393)
Next: Burial rights in the UK · Arranging a funeral
Last verified: 2 May 2026 against the Hydrolysis (Scotland) (No. 1) Regulations 2026, the Hydrolysis (Scotland) (No. 2) Regulations 2026, the Burial and Cremation (Scotland) Act 2016, and Scottish Government published material at mygov.scot and gov.scot.