If you are asking “Is aquamation legal in Montana?”, the short answer is: No, human aquamation is not currently legal within Montana.
Aquamation, scientifically known as alkaline hydrolysis or water cremation, is not authorized or defined under current Montana Code Annotated governing mortuary science and funeral service. Montana state statutes explicitly define human cremation as a process utilizing high heat and flame to reduce human remains. Because of this statutory limit, licensed funeral homes in Big Sky Country cannot perform human water cremation inside state borders at this time.
However, state lawmakers adopted interim legislative studies (such as House Joint Resolution 27) to evaluate alternative disposition methods like alkaline hydrolysis and natural organic reduction. In the meantime, eco-conscious families across Billings, Missoula, Great Falls, Bozeman, and Helena seeking green aftercare can access options through pet aftercare providers or by arranging out-of-state human water cremation services in nearby states where it is authorized (such as Washington, Oregon, Nevada, or Colorado).
This 2026 guide explains Montana’s legal framework, how aquamation works, out-of-state options, and essential tips for selecting an urn for bone ash remains.
Montana Aquamation Laws at a Glance
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Human Remains Legal Status: Not legal for human disposition in-state. Existing statutory definitions limit human cremation to flame-based thermal processing.
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Pet Remains Legal Status: Legal and available through specialized pet aftercare facilities and veterinary partners.
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Regulatory Body: Montana Board of Funeral Service (under the Montana Department of Labor & Industry).
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Workarounds for Human Remains: Families dedicated to water cremation can work with a local Montana funeral director to coordinate transportation to an authorized facility in a state where human aquamation is legal.
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Final Returned Remains: Pure, pale white bone powder (if processed in an authorized state).
What Is Aquamation (Water Cremation)?
Aquamation also called green cremation, bio-cremation, liquid cremation, or flameless cremation is a gentle, water-based disposition method.
Instead of using direct high heat and fossil fuels to reduce human remains, aquamation uses a gentle solution of 95% warm water and 5% alkali (potassium hydroxide or sodium hydroxide). Over a 6- to 12-hour cycle inside a sealed stainless steel vessel, warm liquid flow and natural alkalinity accelerate the body's natural breakdown process.
At the end of the process, only soft, mineral bone fragments remain. These fragments are dried and processed into a fine white powder that can be safely kept at home, buried, or scattered.
Aquamation vs. Traditional Flame Cremation: Key Differences
| Feature | Aquamation (Water Cremation) | Traditional Flame Cremation |
| Primary Method | 95% Water & 5% Alkali Solution | Direct High Heat / Open Flame |
| Energy Consumption | Uses ~90% less energy | High fossil fuel consumption (natural gas/propane) |
| Emissions | Zero direct greenhouse gas stack emissions | Direct carbon dioxide and thermal emissions |
| Returned Remains | Fine, pale white powder | Coarser, gray bone ash |
| Ash Volume | ~20% to 30% greater returned volume | Standard baseline volume |
How Much Does Aquamation Cost?
Because human aquamation cannot be performed inside Montana, overall expenses depend on whether you are utilizing local pet services or transporting human remains out of state:
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Pet Aquamation in Montana: $150 – $450 (varies by pet weight and local provider)
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Out-of-State Human Aquamation: $2,500 – $4,500+ (includes transportation, out-of-state provider fees, and return shipping of ashes)
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Standard Flame Cremation in Montana: $1,200 – $3,000 (widely available statewide)
Choosing an Urn for Returned Ashes
Whether selecting local flame cremation or receiving returned ashes from an out-of-state aquamation provider, choosing the correct urn volume is essential. Because water cremation preserves more mineral bone material than high-heat incineration, the returned remains typically occupy 20% to 30% more space than standard flame cremation ashes.
When shopping for an adult memorial vessel, keep internal capacity top of mind:
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Adult Full-Sized Urns: For water cremation remains, select urns with a volume capacity of 220 to 250+ cubic inches (rather than standard 200 cu. in.) to ensure all ashes fit comfortably.
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Keepsake Urns: Small mini urns designed to hold a small portion of ashes, allowing multiple family members to share a token memory.
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Cremation Jewelry: Keepsake pendants and bracelets engineered with tiny inner chambers to carry a small piece of your loved one near your heart.
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Water-Soluble & Scattering Urns: Specially designed for natural ash-scattering ceremonies on private land, wilderness areas, or national parks with proper permits.
Frequently Asked Questions (FAQ)
Will human aquamation become legal in Montana?
As public interest in eco-friendly disposition grows, the Montana Legislature has engaged in interim studies reviewing green end-of-life alternatives. Industry advocates anticipate future bill introductions to update state cremation definitions.
Can I bring aquamation ashes back to Montana from another state?
Yes. Once the process is performed legally in another state, you can bring or ship the returned ashes back to Montana. TSA permits cremated remains on flights in carry-on luggage provided the container passes X-ray inspection (e.g., wood, ceramic, or glass urns).
Can I keep cremated remains at home in Montana?
Yes. Montana law permits families to keep returned ashes at home, place them in a columbarium niche, bury them on private property, or scatter them with landowner permission.
Find the Right Memorial Container for Your Loved One
Choosing final arrangements is a tender and personal process. Whether selecting traditional flame cremation in Montana or arranging out-of-state green water cremation, explore Trupoint Memorials’ Collection of Cremation Urns to find a handcrafted, beautifully protective vessel for your loved one.
Disclaimer: Information regarding state statutes, funeral industry regulations, and legal statuses is accurate and up to date as of September 2026. Funeral laws and local facility availabilities are subject to change over time. Readers are encouraged to verify current local regulations with the appropriate state licensing boards or licensed funeral professionals.