What Is Pet Aquamation? Water Cremation Explained Simply

Quick answer: Pet aquamation uses water and a potassium hydroxide solution at 200 to 300 degrees Fahrenheit to dissolve organic tissue over 6 to 8 hours. According to the Cremation Association of North America (CANA), it produces white to tan ashes in approximately 32% greater volume than flame cremation, with no CO2 emissions. Regulated separately from human aquamation and far more permissively; availability is the real constraint.

Most families hear about aquamation from a provider or read the term on a price list without understanding what it actually is. This guide explains the process, what it produces, what it costs, and how to know if a provider near you offers it.

What actually happens during aquamation?

Aquamation uses a process called alkaline hydrolysis. Your pet's body is placed in a stainless steel chamber filled with a water-based solution of potassium hydroxide (the same compound used in soap-making). The chamber is sealed, pressurized, and heated to between 200 and 300 degrees Fahrenheit. The solution circulates around the body continuously for 6 to 8 hours.

At these conditions, the alkaline solution breaks down organic tissue at the molecular level: proteins, fats, and DNA dissolve into a sterile liquid made up of amino acids, salts, sugars, and water. Bone mineral structure is preserved because bones are primarily calcium phosphate, which resists alkaline hydrolysis at these temperatures.

After the cycle completes, the liquid is drained. What remains is the pet's bone structure, softened by the process. The bones are rinsed, dried, and processed into the fine powder returned to the family as cremains.

The liquid byproduct is sterile and safe. Most providers discharge it into the municipal wastewater system, where it functions similarly to other organic waste streams. It is not harmful to the environment.

Why does aquamation go by so many different names?

If you search for aquamation, you will find several terms used for the same process: water cremation, alkaline hydrolysis, bio-cremation, hydro-cremation, and resomation. These all refer to the same process. The variation exists because no single term won out as the industry standard when aquamation began entering the mainstream.

"Aquamation" was trademarked for human use in South Africa and became the common marketing term in the pet industry. "Alkaline hydrolysis" is the precise scientific name for the chemical process. "Water cremation" is the most straightforward plain-language description. "Bio-cremation" emphasizes the biological breakdown angle. "Resomation" is a brand name used primarily in the UK.

When searching for a local provider, search for all of these terms. A provider may list it only as "water cremation" on their website while their competitors use "aquamation" or "alkaline hydrolysis."

How is aquamation different from flame cremation?

The most noticeable difference for most families is the ashes themselves. Aquamation produces more ashes, and they are lighter in color because no carbon residue is produced. Families who have chosen aquamation often describe the ashes as softer and more powdery than what they received from flame cremation with a previous pet.

Is aquamation legal in all states?

Pet aquamation is regulated separately from human aquamation and far more permissively. CANA notes that pet crematories operate under different rules and have adopted the process widely, so availability, not legality, is the real constraint for most families. This differs from human aquamation, which is legal in 26 states as of March 2026, according to the Cremation Association of North America. That distinction matters if you are researching for a family member: the rules differ significantly. For pets, there is no state restriction on using aquamation.

However, not all cremation providers offer it. Aquamation requires specialized equipment, specifically a pressurized alkaline hydrolysis chamber, that represents a significant capital investment. Availability is higher in larger cities and in markets with environmentally conscious consumer bases.

Cities in our network with aquamation available include Seattle, San Francisco, San Diego, and Denver. When searching for a provider, look for "aquamation," "water cremation," or "alkaline hydrolysis" in their service listings.

Does aquamation cost more than flame cremation?

Typically yes. Aquamation costs $50 to $200 more than flame cremation for the same pet because of higher equipment costs and longer processing times. Our aquamation cost guide has full national price ranges and a comparison to flame cremation.

That said, some providers price aquamation comparably to private flame cremation because they have absorbed equipment costs over time. It is worth asking your local provider directly rather than assuming aquamation will always be more expensive.

Is aquamation better for the environment?

Meaningfully so. Flame cremation uses a retort heated to 1,400 to 1,800 degrees Fahrenheit, which requires significant energy and releases CO2, water vapor, and particulates. A single flame cremation of a large dog can emit several kilograms of CO2.

Aquamation operates at much lower temperatures, uses significantly less energy, and produces no direct atmospheric emissions. The liquid byproduct is safely discharged. For families who prioritize minimizing environmental impact, aquamation is the more consistent choice.

According to aquamationinfo.com, aquamation uses approximately one-eighth the energy of flame cremation and produces a fraction of the greenhouse gas emissions. That gap grows larger for bigger pets: a large dog or medium-sized livestock animal shows the energy difference most clearly.

What will the ashes look like?

Aquamation ashes are white to tan in color, with a fine, consistent powder texture. The volume is about 32% greater than you would receive from flame cremation for the same pet. For a medium-sized dog, expect roughly the equivalent of a 1.5 to 2-quart container.

The ashes are chemically inert and safe to handle, scatter, or use in memorial products such as urns or jewelry. They behave identically to flame cremation ashes in terms of what you can do with them afterward.

Some families specifically prefer aquamation ashes for cremation jewelry because the finer texture and lighter color are considered aesthetically preferable. This is personal preference, not a practical difference.

Who is aquamation best suited for?

Aquamation is worth considering if:

• Environmental impact matters to you and you want to minimize it
• You want more ashes returned (about 32% more volume)
• You prefer lighter-colored, finer ashes
• A provider in your area offers it at a comparable price to flame cremation

It may not be practical if:

• Timing is critical: aquamation takes 10 to 14 days total versus 5 to 10 for flame cremation
• Cost is the primary factor: aquamation typically costs more
• It is not available in your area: confirm with local providers before assuming it is an option

For a side-by-side comparison of all cremation types and what each returns to you, see our guide on private vs. communal pet cremation. For a full walkthrough of the standard cremation process, see how pet cremation works.