Human Composting Colorado: How Natural Organic Reduction Works

Colorado was among the first states to legalize natural organic reduction — the process most people call human composting. If you're considering it for yourself or a loved one, here's exactly how it works, what the law requires, and what providers must and cannot do.

What the Law Says

Colorado legalized natural organic reduction (NOR) through Senate Bill 21-006. The law defines NOR as a contained, accelerated biological decomposition process that converts human remains into nutrient-rich soil amendment. It places NOR under the broader regulatory framework governing the death care industry, which means facilities offering NOR must be registered with DORA (the Department of Regulatory Agencies) and employ licensed natural reductionists — a new professional designation created alongside the legalization.

SB 24-173, passed in 2024, extended formal licensure requirements to natural reductionists as part of Colorado's broader mortuary science reform. Full compliance with that licensing framework takes effect by 2027, so if you're choosing a NOR provider today, verify their DORA registration status.

The Process from Start to Finish

Natural organic reduction typically takes three to six months from the time remains enter the facility to the time family receives the resulting soil amendment.

The process works like this: the body is placed in a reusable vessel along with organic materials — typically wood chips, straw, and alfalfa. Microbial activity, heat, and controlled aeration accelerate decomposition. After the initial reduction phase, the remains are processed to remove any non-organic materials (metal implants, surgical hardware, pacemakers — which must be removed before the process begins, just as they must before flame cremation). The result is roughly one to two cubic yards of soil amendment.

The timeline varies based on body composition, facility protocols, and the specific vessel used. Three months is a realistic minimum; some facilities quote closer to six for complete processing.

What Colorado Law Prohibits

The legislation includes strict consumer protections that address obvious concerns about dignity and consent.

No selling the soil. Facilities are legally prohibited from selling or offering to sell the resulting soil amendment. It belongs to the family. They can choose to take it home, donate it to a conservation project, or leave it at the facility if the facility has arrangements for this — but the facility cannot profit from it.

No commingling without consent. Remains and the resulting soil amendment from multiple individuals cannot be combined without the explicit written consent of all parties involved. This directly addresses the type of concern raised by the Return to Nature scandal, where the integrity of individual remains was compromised.

No food-crop use. Colorado law explicitly prohibits using NOR soil amendment to grow food intended for human consumption. It can be used in gardens, forests, or land restoration projects — just not food agriculture.

These aren't advisory guidelines. They're statutory requirements with enforcement consequences.

How NOR Compares to Cremation and Alkaline Hydrolysis

Colorado also permits alkaline hydrolysis, known as aquamation or water cremation. Under Colorado's statutory definitions, alkaline hydrolysis falls under the broader umbrella of cremation — it uses water, heat, alkaline chemicals, and agitation to reduce remains to bone fragments, which are then processed into a powder similar to what flame cremation produces.

The key differences between your three non-traditional options:

Natural organic reduction: Returns a substantial amount of soil amendment (1-2 cubic yards). Takes months rather than days. Results in a genuinely organic, biologically active material. Best suited for families who want the most environmentally integrated outcome and have a land use in mind.

Alkaline hydrolysis: Returns a powder similar in volume and appearance to flame cremation remains. Takes roughly the same timeline as flame cremation (days, not months). Lower emissions than flame cremation. Good option for families who want the environmental advantages without the NOR timeline.

Flame cremation: Fastest and most widely available. Returns 3-9 pounds of processed bone fragments. Familiar process with well-established handling procedures.

All three are legally authorized in Colorado. Which one suits your situation depends on timeline, your intentions for the remains, and available providers in your area.

Scattering and Using the Soil

If you choose NOR and take the soil home, Colorado has no state laws specifically prohibiting the use of NOR soil amendment on private property with landowner permission. The same general principles that govern scattering cremated remains apply: get permission if it's private land, follow federal rules on federal land.

Rocky Mountain National Park requires a free permit for scattering any remains — whether cremated or NOR-derived — and requires distribution at least 200 feet from any water source, trail, or developed area. The ashes or soil must be dispersed completely rather than piled, and no markers or monuments may be left behind.

For BLM land, check with the specific field office for the area you have in mind. Rules vary by district.

Practical Considerations Before You Choose

Verify provider registration. NOR is a specialized process. Not every crematory offers it. Confirm DORA registration and ask whether the facility employs a licensed natural reductionist.

Ask about the vessel and timeline. Inquire about the specific vessel system used, the expected timeline from intake to completion, and what happens if the process takes longer than estimated.

Clarify how you receive the amendment. Most families receive it in a sealed container similar to how cremated remains are returned. Ask whether there's a choice of container and whether a portion can be retained while the remainder is donated to a project.

Understand the cost. NOR typically costs more than direct cremation because of the time, materials, and specialized facility requirements involved. Get an itemized price list — which the FTC Funeral Rule requires any registered provider to furnish.

The Colorado Funeral Laws & Consumer Rights Guide covers NOR authorization documents, DORA registration verification, and the comparison framework for all disposition methods available under Colorado law.

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