Understanding aquamation: what families should know

Aquamation — also called alkaline hydrolysis or water cremation — is a gentler alternative to flame cremation that uses warm water and a natural solution to return the body to its basic elements. It is available in a growing number of states and is chosen by families who want a lower environmental impact or prefer the process for personal or spiritual reasons.

What an aquamation provider does

An aquamation provider performs the full process of alkaline hydrolysis: transporting the deceased, filing the death certificate and cremation permit, conducting the aquamation process, and returning the cremated remains (called "ashes" informally, though they are distinct from flame cremation remains). The process uses a combination of warm water, potassium hydroxide, and gentle agitation over several hours to break down soft tissue, leaving only clean bone material, which is then processed into the powder returned to the family. No flame is involved.

Key questions to ask

• Is aquamation legal in my state? Aquamation is authorized in approximately 30 states and the District of Columbia as of 2026. Ask the provider to confirm legality in your state before proceeding.
• How is identification maintained? As with any disposition process, ask specifically how the body and remains are identified and tracked throughout. A metal identification tag should remain with the body.
• What will the remains look like? Aquamation typically produces approximately 32% more cremated remains by volume than flame cremation, and the color is often lighter — closer to white or cream. This is important for urn selection: a standard cremation urn may not be large enough.
• What size urn do I need? Because the volume of remains is larger, families should ask about appropriate urn sizing before purchasing. Standard urns (around 200 cubic inches) may be too small; ask the provider for guidance based on the person's weight.
• Where is the process performed? Not all funeral homes that offer aquamation perform it on-site. Ask whether they use their own aquamation chamber or contract with another facility.
• What happens to the water used in the process? The remaining water, which contains amino acids and small peptides from the process, is typically released to the municipal water system — the same system used for any wastewater. Ask the provider how they handle the effluent if this is a concern.
• Do you require an alternative container or casket? As with cremation, no casket is required for aquamation. A rigid alternative container is sufficient.

What to watch for

• Providers who cannot confirm state authorization. Aquamation regulation is still evolving. A provider should know definitively whether the process is legal and licensed in your state.
• Vague answers about remains volume. The difference in volume from flame cremation is significant for urn selection. A provider who has not discussed this with you has not prepared you adequately.
• No written price list. The same FTC Funeral Rule requirements that apply to cremation providers apply here. Itemized pricing should be provided before you commit.
• Limited or no facility transparency. Ask to learn about the equipment and process. Providers doing this well are typically comfortable explaining it.

Licensing and credentials

Aquamation providers are licensed at the state level, and regulation varies significantly by state. In states where aquamation is authorized, the provider must hold the applicable state license — typically a crematory or disposition license that has been extended to cover alkaline hydrolysis. Verify the provider's license with your state's funeral regulatory board. Because this is a newer industry, the regulatory framework continues to develop; confirm that the provider is actively licensed, not grandfathered under an older permit.

Typical cost range

Aquamation typically costs between $1,500 and $4,000 in the United States, somewhat higher than direct flame cremation. The premium reflects the smaller number of providers, the specialized equipment, and in some regions, longer transportation distances. Prices vary by location; urban providers tend to be more competitively priced than those in areas where aquamation is rare.

For families who want the ecological gentleness of aquamation, taking time to find a licensed, transparent provider is worth the effort.

Frequently asked questions

How is aquamation different from cremation?

Flame cremation uses heat (around 1,400–1,800°F) to break down the body. Aquamation uses warm water (around 200–300°F) combined with an alkali solution at low pressure. The result in both cases is bone material that is processed into a powder returned to the family. Aquamation uses significantly less energy, produces no direct emissions, and typically results in more remains by volume.

Is aquamation accepted by religious traditions?

This varies by tradition and personal interpretation. Some religious communities that have concerns about flame cremation find aquamation more acceptable; others hold the same reservations about any form of cremation. If this is a consideration, speaking with a faith leader before making a decision is worthwhile.

Can I use my own urn for aquamation remains?

Yes, in most cases. Because aquamation produces a larger volume of remains than flame cremation, confirm with the provider that your urn is large enough before the process begins. Providers can usually advise on minimum urn capacity based on the person's weight.

Related resources

• What to look for when choosing a cremation provider
• What to look for when choosing a green burial provider
• Cremation vs. burial: costs and considerations

Disclaimer — For informational purposes only

This article is compiled from publicly available resources and is provided solely for general informational purposes. It does not constitute and should not be relied upon as legal, financial, tax, insurance, medical, psychological, or other professional advice. Passings is a planning and organizational platform, not a licensed advisory service, and no attorney-client, financial advisor-client, or other professional relationship is created by reading this content.

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