A Gentler Way to Return to the Earth
More families are asking their funeral directors about aquamation — and finding that the option simply isn't available in their state yet. The word sounds clinical, even unfamiliar, but the underlying process is close to what nature does already when a body is buried in soil. It's just dramatically accelerated.
Aquamation — also called water cremation or alkaline hydrolysis — uses warm water and a small amount of potassium hydroxide to gently break down a body over several hours, rather than flame. The result is a sterile liquid and soft bone fragments that families receive as remains. For many people drawn to an eco-friendly, lower-emission farewell, it's a deeply meaningful option.
This guide explains exactly what the process involves, why the remains look different from flame cremation, which states have legalized it as of 2026, and what families can realistically expect to pay. The goal is to give you a clear picture before a loss makes the research urgent — so you can make a thoughtful, informed choice.
What Is Aquamation? The Science Without the Jargon
Alkaline hydrolysis is the scientific name for what most providers call aquamation or water cremation. The body is placed in a stainless-steel vessel filled with approximately 95% water and 5% potassium hydroxide. Heat — roughly 200–302°F depending on the equipment — combined with gentle water flow accelerates the body's natural decomposition. The same process happens in the soil over years; aquamation accomplishes it in 4–8 hours.
No fire is involved. There is no combustion, no smoke, and no mercury vapor released from dental fillings — a meaningful environmental distinction from flame cremation. What remains at the end of the process is two things: soft bone fragments (composed of calcium phosphate) and a sterile liquid known as the effluent.
The Cremation Association of North America (CANA) describes the process as accelerating "the same type of decomposition that would naturally occur if remains were placed in soil." For families who find the idea of flame cremation uncomfortable, aquamation often feels more in keeping with their values — a return to the earth through water rather than fire.
The entire process typically takes between 4 and 16 hours depending on the equipment used. Families generally receive the remains within a few days, a timeline similar to conventional flame cremation.
What Happens to the "Ashes"?
After aquamation, the soft bone fragments are dried and processed into a fine powder — similar in texture to what families receive after flame cremation. There are two key differences families should know about. First, the remains are bright white in color rather than the grey hue typical of flame cremation, because they haven't been exposed to heat and combustion. Second, there is approximately 20–32% more volume than with flame cremation — which means families may need a larger urn to hold the remains.
Chemically, aquamation remains are identical to flame cremation remains: calcium phosphate. Everything you can do with conventional cremation ashes — scatter them, keep them in an urn, incorporate them into memorial jewelry from ashes, use them to plant a tribute tree, or add them to memorial glass art — can be done with aquamation remains. Per CANA, there are no restrictions unique to aquamation remains for any of these purposes.
One practical note: plan for an urn that holds at least 250–280 cubic inches. Standard urns designed for flame cremation remains may be too small.
What Happens to the Liquid?
The effluent — a sterile, slightly alkaline liquid — is released to the local wastewater treatment system in accordance with state and local regulations. CANA describes it as containing amino acids, salts, peptides, and sugars — harmless compounds that are, in many cases, released into the water supply already through ordinary biological processes.
There is no DNA remaining in the liquid. It does not contain the person's remains in any meaningful sense. In some agricultural contexts, the effluent is used as fertilizer. For most families, understanding it as a byproduct of a natural process — sterile and benign — is accurate and sufficient.
How Aquamation Compares to Flame Cremation and Burial
No single disposition choice is right for every family. The most helpful thing is to understand how these options differ — practically, environmentally, and in cost — and let that information guide your thinking.
Environmental Footprint
Aquamation's environmental profile is one of its most distinctive features. Multiple providers citing process studies report that aquamation uses approximately 90% less energy than flame cremation. It produces no greenhouse gas emissions during the process, and no mercury vapor is released from dental amalgam fillings — an important advantage over conventional flame cremation, which has been a focus of air quality regulation.
The process does use roughly 60–240 gallons of water per body. And a cradle-to-grave environmental comparison found aquamation favorable across 18 distinct environmental impact categories compared to flame cremation and conventional burial. For families for whom environmental stewardship is central to how they want to be remembered, this comparison matters.
Time and Experience
Aquamation takes 4–16 hours depending on the equipment, compared to 1.5–3 hours for flame cremation. Families typically receive the remains within a few days in both cases. There is no viewing during either process — from the family's perspective, the practical experience is very similar. The meaningful difference is in what happens inside the vessel, and in the environmental impact beyond it.
Cost Comparison
Aquamation typically costs more than direct flame cremation, partly because the equipment required — up to $260,000 per machine — represents a significant capital investment for funeral providers. The table below provides reference pricing; actual costs vary by provider and location.
| Method | Average Cost | Notes |
|---|---|---|
| Flame cremation (direct) | ~$1,500 | Range $600–$3,000 |
| Aquamation | ~$2,500 | Range $1,295–$4,600 |
| Traditional burial | ~$8,300–$9,995 | Per NFDA 2023 median, with vault |
Sources: Green Cremation Texas (2025) and After.com. Costs are averages; ask your provider for an itemized General Price List.
Where Is Aquamation Legal in 2026?
As of 2026, alkaline hydrolysis is legally recognized in 29 U.S. states, per World Population Review (updated May 2026) and data from NFDA and CANA. New Hampshire is the only state where it is explicitly illegal. In 22 states and the District of Columbia, no legislation currently addresses it — which typically means it exists in legal ambiguity rather than outright prohibition.
An important distinction: legal does not mean available. In five states — Idaho, Kansas, Maryland, Vermont, and Wyoming — alkaline hydrolysis is legally permitted but not currently offered by licensed providers. Families interested in the option should confirm availability with a local funeral home before making plans.
Nationally, aquamation accounts for only about 0.1% of all dispositions, according to the CANA 2025 Annual Statistics Report. Even in states where it's legal, local access may be limited to one or two providers.
States Where Aquamation Is Legal and Available
States with both legal recognition and available providers include Florida, California, Texas, Colorado, Washington, Oregon, Illinois, New York, Michigan, Missouri, Arizona, Nevada, Minnesota, and Georgia, among others. If you live in one of these states, ask your funeral home directly whether they perform aquamation on-site or coordinate with a third-party provider.
The practical reality varies widely. In a major metro area in California, you may have three or four options within an hour's drive. In a rural part of a legal state, you may need to plan for transport to a larger city. Your funeral director can tell you what's realistic in your specific community.
If You Live in a State Where It Isn't Available
Some families in states without available providers choose to transport remains to a neighboring state where aquamation is offered. This is logistically possible but adds cost — typically $500–$1,500 in additional transportation fees — and requires coordination with a licensed funeral home in both states. If you're exploring this route, it's worth having the conversation with a funeral director early, well before a loss occurs.
If aquamation isn't accessible where you live, there may be other options worth exploring — you can find a broader overview of eco-friendly burial alternatives that covers green burial, human composting, and more.
Aquamation and the Question of Remains: What's Different, What's the Same
One of the things families most want to understand before choosing aquamation is how the remains — what many people call "ashes" — differ from what they'd receive with flame cremation. The differences are real but straightforward, and knowing them in advance removes a lot of uncertainty from an already difficult process.
The most visible difference is color. Aquamation remains are a brighter white than the grey-white typical of flame cremation, because alkaline hydrolysis doesn't involve combustion. Some families find this more comforting; others simply note it as a difference. Neither is more or less the person's remains. The second difference is volume: aquamation produces more — 20–32% more by volume than flame cremation, because more of the bone mineral structure is preserved. This matters practically when selecting an urn, but it doesn't affect any of the options available for honoring the person's memory.
Chemically, both flame cremation and aquamation produce calcium phosphate — the mineral component of bone. The two are indistinguishable in a laboratory. Memorial uses that work with flame cremation remains work equally with aquamation remains: memorial diamonds, pressed glass art, incorporation into ceramics, and memorial jewelry all accept aquamation remains in the same way. If you're thinking about a specific tribute — combining remains with a living reef, planting them with a tree, or incorporating them into jewelry — ask the provider directly to confirm that your specific plan is compatible.
What Families Should Ask Before Choosing Aquamation
Once you've confirmed that aquamation is available in your area, here are the questions most worth asking the funeral home directly:
- Does your facility perform aquamation on-site, or do remains go to a third-party facility? On-site is generally preferable for families who want to know exactly where their loved one is throughout the process.
- What is the timeline from death to return of remains? Expect 2–5 days for most providers, but confirm.
- What size urn will I need? Aquamation remains are 20–32% greater in volume than flame cremation remains. Most standard urns are designed for flame cremation; your provider can advise on sizing. You can also find guidance in our article on choosing the right urn.
- What are the total itemized costs? Ask for a full General Price List, including transportation, the aquamation process itself, and the urn. You are legally entitled to this under the FTC Funeral Rule.
- What happens to the effluent? Most providers release it to the wastewater system; some partner with agricultural facilities. Either is appropriate — this is a matter of curiosity, not concern.
- Can the remains be scattered, incorporated into memorial items, or used in a tribute tree? Yes — but it's worth confirming your specific plans with the provider so they can package the remains appropriately.
What Families Receive — and What You Can Do With the Remains
Receiving aquamation remains is, in most practical respects, similar to receiving flame cremation remains. The funeral home will return the processed powder in a container or temporary urn. The powder is bright white and fine — finer, in many cases, than flame cremation ash. Plan for a larger urn: a minimum of 250–280 cubic inches is a reasonable guideline, though your provider can give you exact dimensions based on the individual.
Families have exactly the same range of options they would have with flame cremation remains. Many choose an ash scattering ceremony — at sea, in the mountains, in a garden, or at a place the person loved. Others keep the remains in an urn, place them in a niche, or choose burial. A growing number incorporate a portion of the remains into memorial jewelry, glass art, or pressed into a vinyl record — options that preserve a physical connection without requiring a permanent decision about the rest of the remains.
Some families use a portion of the remains to plant a tribute tree — a living memorial that grows over years. Because aquamation remains are chemically identical to flame cremation remains (calcium phosphate), they interact with soil and plant life in the same way. There is nothing unique about aquamation remains that limits any of these options.
Is Aquamation Right for Your Family?
There is no universally right answer to this question. Some families choose aquamation because of deeply held environmental values — they want their loved one's final act to be as gentle on the planet as the life they lived. Others choose it because a loved one expressed that preference. Others simply find that it feels more peaceful, more natural, than fire. All of these are valid reasons, and none requires justification to anyone.
Practical considerations matter too. Availability in your state and community may constrain the choice entirely. Cost is a real factor — aquamation runs $1,000 or more above direct flame cremation on average, though it remains well below traditional burial. And the difference in the remains — brighter, more voluminous — may feel significant to some families and irrelevant to others.
If aquamation isn't available or accessible for your family, there are other eco-friendly burial alternatives worth knowing about, as well as the full range of options covered in our guide to comparing cremation and burial. The most important thing is that the choice feels right — and that it honors who the person was.
Honoring Someone Who Chose Aquamation
The manner of final disposition is one part of how a person is remembered — an important part, but not the whole. A memorial service, a gathering of the people who loved them, a tribute book, or a scattering ceremony matters just as much as what happened before the remains were returned. In many ways, those choices carry more of the person's spirit.
If you're thinking about how to bring people together to honor someone, our guides to planning a celebration of life and to creating a meaningful scattering ceremony offer practical help for both. A life lived fully deserves to be honored fully — and aquamation, for the families who choose it, is one beautiful way to begin that return.
Sources
World Population Review. "Alkaline Hydrolysis Legal States 2026." Updated May 2026. worldpopulationreview.com/state-rankings/alkaline-hydrolysis-legal-states
Cremation Association of North America (CANA). "Alkaline Hydrolysis Process Overview." cremationassociation.org/alkalinehydrolysis.html; CANA 2025 Annual Cremation Statistics Report (AH accounts for ~0.1% of dispositions nationally).
Green Cremation Texas. "Water Cremation Cost: Your Complete Pricing Guide." 2025. cremation.green/water-cremation-cost/
Endswell Funeral Home. "Environmental Benefits of Aquamation." endswellfuneralhome.com/environmental-benefits-of-aquamation/
US Funerals Online. "Where is Aquamation Legal?" October 2024. us-funerals.com/where-is-aquamation-legal-which-states-have-legalized-aquamation-or-bio-cremation/
Wikipedia / Alkaline Hydrolysis. Process details: water volume (60–240 gallons), temperature, timeline (4–16 hours). en.wikipedia.org/wiki/Water_cremation