Pet Aquamation (Water Cremation): What It Costs and Whether It's Legal

Pet aquamation — also called water cremation or alkaline hydrolysis — uses heated water and alkalinity instead of flame to return your pet’s body to bone ash. It’s a gentler, lower-energy alternative to traditional cremation, legal for pets across the US, and it returns more ash than flame. Expect to pay roughly $30–$80 more than flame cremation.

Below: how it works, what it costs for a pet, whether it’s legal where you live, how it compares to flame cremation, and how to choose a provider — from an independent resource with no provider to sell you.

What pet aquamation is

Aquamation is the common name for alkaline hydrolysis — and you’ll also see it called water cremation, green cremation, or resomation. Instead of flame, it uses a heated solution of about 95% water and 5% alkali (potassium or sodium hydroxide) to gently break the body down to its mineral components over several hours. What’s left is the same as flame cremation: clean bone ash you can keep, scatter, or bury.

Aquamation (water)

Gentlest option

Heated water + alkali, no flame

• Runs at about 200–300°F
• Takes ~3–16 hours; ashes back in 1–3 weeks
• Returns ~20–30% more ash, a cleaner white
• Uses ~90% less energy; no direct emissions
• Typically costs about $30–$80 more
• Less widely available — fewer facilities have the equipment

Flame cremation

Heat and flame

• Runs at about 1,400–1,800°F
• Takes ~1–3 hours; ashes back faster
• Returns less ash, gray in color
• Higher energy use; produces combustion gases
• The price baseline
• Widely available almost everywhere

Neither is 'better' — it comes down to what matters to you. Figures are from Hallowed Paws' review of U.S. pet aftercare providers and CANA guidance, 2026.

For where it fits among all the choices, see how pet cremation works.

How the process works

The steps, based on standards from the Cremation Association of North America (CANA), the industry body for both flame and water cremation:

1. 1

   Placement

   Your pet is placed in a stainless-steel vessel.

2. 2

   Heated solution

   The vessel fills with the water-and-alkali solution and is gently heated — typically 200–300°F, far cooler than flame cremation's 1,400–1,800°F.

3. 3

   Breakdown

   Over roughly 3 to 16 hours (depending on the system and your pet's size), the solution breaks the body down to bone fragments and a sterile liquid.

4. 4

   Liquid released

   The liquid — sterile, DNA-free, and containing no tissue — is released to the wastewater system, the same as other facility water.

5. 5

   Ashes returned

   The remaining bone fragments are dried and processed into a fine, white ash and returned to you.

Start to finish, getting your pet's ashes back usually takes one to three weeks — longer than flame cremation, because the process is slower and fewer facilities offer it.

There’s no flame, no smoke, and no direct emissions — which is the basis for aquamation’s environmental claims, covered below.

What you get back

With aquamation you receive your pet’s ashes, just as with flame cremation — but typically about 20–30% more of them (CANA cites roughly a third more). The gentler process leaves more of the bone behind rather than burning it away. The ash also comes back a cleaner, purer white than the gray ash flame cremation produces.

One practical note: because there’s more ash, you may need a slightly larger urn than you’d expect for a pet your size. Ask the provider what their standard urn holds.

What happens to the water?

What remains after the process is a sterile liquid — water, salts, amino acids, and minerals — that contains no DNA and no tissue. It’s released into the wastewater system the same way other facility water is, fully neutralized and pathogen-free. Some facilities go further and use it on land as a nutrient-rich soil additive.

There’s nothing of your pet in that liquid in the way people sometimes fear — your pet comes back to you as the bone ash. The water is simply what the gentle, low-temperature process leaves behind.

Is pet aquamation legal?

For pets, aquamation is legal across the United States. Pet aftercare is regulated differently — and far more loosely — than human funerals, so pet aquamation is treated as a form of pet cremation and is available wherever a provider has the equipment.

The “it’s illegal” worry comes from human aquamation. Alkaline hydrolysis for people is legal in roughly 26 states as of 2026, per CANA, and is still working its way through legislatures elsewhere (counts vary by source as new states pass it). When someone reads that “aquamation is illegal in my state,” they’re almost always reading about the human rules — which don’t apply to pets.

Why is human aquamation restricted anywhere? Not for safety reasons. It’s regulatory lag, and in some places religious or aesthetic objections to the idea. The science isn’t in question; the laws simply haven’t caught up.

So the real limit on pet aquamation isn’t the law — it’s availability. Fewer facilities have the equipment, so you may have to look a little harder, or wait a little longer, than you would for flame cremation.

What pet aquamation costs in 2026

Pet aquamation runs a little more than flame cremation — generally $30 to $80 more for a comparable private service, because the equipment is newer and the process is slower. Typical 2026 ranges:

Pet size	Private aquamation (ashes returned)
Cat / small pet (under 30 lb)	$150–$400
Medium dog (30–60 lb)	$250–$450
Large dog (60–120 lb)	$350–$800
Premium / urban providers	$500–$1,500+

Urban areas tend to run 20–50% higher, and as with flame cremation, your pet’s weight and the service type (private vs. communal) drive most of the price. For how that fits the bigger picture, see our cost of pet cremation guide.

Is it really “greener”?

Aquamation is marketed as the eco-friendly choice, and the direction is well supported — but the specific numbers deserve honesty.

The figures you’ll see repeated: aquamation uses roughly 90% less energy than flame cremation, produces no direct greenhouse emissions (a single flame cremation releases an estimated 500+ lbs of CO2), and emits no mercury. Those numbers come mainly from equipment manufacturers and facility operators, not a single independent peer-reviewed study — so treat the exact percentages as directional rather than precise.

That said, the underlying physics is sound: a ~250°F water process simply uses far less energy than an ~1,700°F flame, and a process with no combustion has no combustion emissions. If environmental footprint is your deciding factor, aquamation is very likely the lower-impact choice. Just know the precise percentages get repeated more confidently than the evidence strictly supports.

Is aquamation right for your pet?

A quick way to decide between aquamation and flame cremation:

Aquamation tends to be the better fit if you want the gentlest, lowest-energy option; you’d like more of your pet’s ashes returned; the environmental footprint matters to you; and you’re willing to pay a little more and wait a little longer.

Flame cremation tends to make more sense if you want your pet’s ashes back quickly, you’re working within a tight budget, or there’s no aquamation provider within a reasonable distance. There’s no wrong answer here — both return your pet to you with care.

Can every pet be aquamated?

Most can. Aquamation systems handle cats, dogs of nearly every size, and small animals routinely. Very large animals — a Great Dane, or a horse — may need a facility with a larger vessel, so it’s worth confirming when you call. The bigger practical limit, again, is simply whether a provider near you offers it at all.

How to choose an aquamation provider you can trust

Because aquamation is newer and less standardized, a few questions separate a good provider from a vague one:

1. “Is this private (individual) or communal?” Like flame cremation, aquamation can be done individually or with several pets together. If you want your pet’s ashes back, confirm private.
2. “How do you identify and track my pet through the process?” A reputable provider uses an ID system from intake to return.
3. “What will I get back, and what urn does it come in?” Remember aquamation returns more ash — ask whether the standard urn fits.
4. “How long will it take?” Aquamation is slower than flame; 1–3 weeks for return is common. A clear answer is a good sign.
5. “Can I see the facility, or witness the process?” Confidence in answering this is itself a signal.

If a provider can’t answer these clearly, keep looking. For the questions that apply to any cremation, see private vs. communal cremation.

Finding aquamation near you

Because not every provider offers it, aquamation can take some searching — and that’s part of what we do. Tell us your city and we’ll connect you with the provider in your area we’d trust with our own pets, and tell you honestly whether aquamation is available near you or whether flame cremation is your realistic option. It’s free for pet owners, with no paid listings and no upsells — just a straight answer when you need one.