Alkaline Hydrolysis in Tennessee: Is Aquamation Legal and Where to Find It

Alkaline hydrolysis — commercially marketed as aquamation or water cremation — has been legal in Tennessee since January 1, 2013. The state proactively legalized it by expanding the statutory definition of "cremation" under T.C.A. Title 62, Chapter 5, Part 8 to include the process. That puts Tennessee ahead of the majority of U.S. states on this particular issue.

Human composting (natural organic reduction) is a different story entirely. It remains illegal in Tennessee as of 2026.

How Alkaline Hydrolysis Works

The process uses water, heat, pressure, and an alkaline solution (potassium hydroxide) to accelerate natural decomposition. The body is placed in a pressurized steel vessel, and over the course of several hours, the soft tissue dissolves completely. What remains is the mineral bone structure, which is processed into a fine white powder and returned to the family — similar in appearance to cremation ashes but produced without combustion.

The environmental appeal is straightforward: aquamation uses roughly one-eighth the energy of flame cremation and produces no direct carbon emissions, mercury vapor (from dental amalgam), or particulate matter. The liquid byproduct, called effluent, is a sterile alkaline solution that is released into the municipal water system after treatment — the same process used in other industrial water discharge.

The Legal Framework in Tennessee

Tennessee didn't create a separate regulatory category for aquamation. Instead, the legislature amended the definition of cremation to encompass alkaline hydrolysis, which means existing cremation regulations apply:

• Authorization requirements are the same as flame cremation — the person with disposition authority under the T.C.A. § 62-5-703 hierarchy must sign a cremation authorization form
• The county medical examiner must review and approve the authorization before the process begins
• Waiting period — the same practical 24-to-48-hour window that applies to flame cremation
• Pacemaker and device removal — mechanical and battery-operated implants must be removed before processing, just as with flame cremation

Facilities offering aquamation in Tennessee must comply with operational, environmental, and facility standards under T.C.A. Title 62, Chapter 5, Part 8. Providers are licensed by the Tennessee Board of Funeral Directors and Embalmers.

Finding a Provider

Availability remains the practical limitation. While legally permitted statewide, aquamation facilities are geographically concentrated. As of 2026, providers are limited — not every metropolitan area has a facility, and families in rural Tennessee may need to arrange transport of the remains to a provider in a larger city.

Contact the Tennessee Board of Funeral Directors and Embalmers for current licensed aquamation providers, or ask your local funeral home directly. Many traditional funeral homes can coordinate with an aquamation facility even if they don't operate one on-site.

Cost Comparison

Aquamation generally costs between $2,000 and $5,000 depending on the provider and service level — roughly comparable to direct cremation or slightly higher. The premium reflects the smaller number of providers and the capital cost of the specialized equipment. As more facilities come online, the price gap with flame cremation is expected to narrow.

For context, the median cost of a funeral with viewing and burial in Tennessee runs well above $7,000. Both aquamation and direct flame cremation represent significant savings compared to traditional burial.

Human Composting Is Not Legal in Tennessee

Natural organic reduction — the process of converting human remains into soil — remains prohibited under Tennessee law. Legislative efforts to change this, including House Bill 2591 that would have placed the process under Board of Funeral Directors oversight, have failed to advance.

As of 2026, only a handful of states have legalized human composting: Washington (the first, in 2019), Colorado, Oregon, Vermont, California, New York, and a few others. Tennessee is not among them.

Families who want natural organic reduction must arrange and pay for the interstate transport of remains to a state where the practice is legal. This involves additional permitting — Tennessee's burial transit permit system, coordinated through the VRISM electronic death registration portal, must authorize the out-of-state transport. The receiving facility in the destination state will also have its own intake requirements.

Green Alternatives That Are Legal

For environmentally motivated families who want options beyond traditional burial or flame cremation, Tennessee offers several legal alternatives:

Green burial — burial without embalming, in a biodegradable container or shroud, in a natural setting. Tennessee allows this on private property (with 24-inch minimum depth) and at designated green burial cemeteries. No casket or vault is required by state law.

Home burial — families can conduct the entire process without a funeral director, including preparation, transport, and burial on private land. The primary constraint is the VRISM death certificate system, which limits home-funeral families to paper filing with the local health department.

Aquamation — as described above, fully legal since 2013.

The Tennessee Funeral Laws & Consumer Rights Guide covers the full legal framework for all disposition methods — including the authorization requirements, transport permits, and consumer protections that apply to each option.

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