Terramation and the EPA (colloquially referred to as human composting)

There is no dedicated EPA regulation governing natural organic reduction (NOR) — terramation — as of 2026. That is the honest answer, and any discussion of this topic should say so clearly. The absence of a dedicated federal rule does not mean NOR is unregulated — it means regulation currently happens at the state level, with state environmental agencies setting the standards that licensed NOR facilities must meet. The EPA’s composting guidance, general facility environmental rules, and air quality regulations all touch NOR in various ways, but the EPA has not developed a framework specifically addressing terramation as a form of human disposition.

Does the EPA regulate terramation / human composting?

No — as of 2026, the EPA has no specific regulation governing natural organic reduction. NOR facilities are regulated by state environmental agencies, which draw on EPA composting pathogen reduction guidance (55°C for at least 3 consecutive days) as their safety benchmark. Washington State's Department of Ecology has the most developed NOR environmental framework, in place since 2020, and it has served as the model for other states.

The EPA has issued no dedicated rule or permit program for natural organic reduction as of 2026 — all environmental oversight is at the state level.
EPA composting pathogen guidance (55°C sustained temperatures) is the de facto safety benchmark that state NOR regulators use, even though it is not legally binding as an NOR-specific rule.
40 CFR Part 503 governs sewage sludge, not NOR — it is only referenced because its pathogen standards match general composting guidance thresholds.
NOR produces no mercury vapor (unlike cremation's combustion of dental amalgam) — metals remain in solid form and are recovered after decomposition.
Washington's Department of Ecology (WAC 173-350-240) developed the most mature state NOR environmental framework, operational since 2020.
Future EPA involvement — such as NOR-specific guidance or federal recognition of NOR's lower emissions footprint — is possible as the industry scales but has not occurred as of 2026.

What EPA Rules Currently Apply to NOR Facilities?

Even without NOR-specific regulations, NOR facilities are subject to existing federal environmental rules:

General facility regulations. Any facility handling organic material at scale is subject to applicable environmental baseline requirements — stormwater management, general air quality standards, and solid waste handling rules. An NOR facility is no exception. These rules apply to the facility as a whole, not specifically to the NOR process.

EPA composting guidance. The EPA has published composting guidance including pathogen reduction standards: 55°C (131°F) for at least 3 consecutive days in actively turned systems, or 15 days in static systems. These standards are referenced by state regulators as they develop NOR-specific rules. Washington State’s NOR regulations explicitly cite these thresholds as the benchmark NOR operators must meet. While this guidance is not legally binding as a dedicated NOR rule, it functions as the de facto scientific reference standard.

40 CFR Part 503 — a note of caution. This section of the Code of Federal Regulations governs sewage sludge (biosolids) composting. Some discussions of NOR safety reference Part 503 because its pathogen standards are identical to general composting guidance thresholds — but to be clear: Part 503 applies to sewage sludge, not to NOR. The standards are referenced because they represent the accepted scientific benchmark, not because the regulation itself governs NOR.

Mercury emissions. The EPA regulates mercury emissions from medical waste incinerators and crematories in certain contexts. Cremation can release mercury vapor from dental amalgam during combustion. NOR does not involve combustion; amalgam-containing teeth pass through the process intact and metal is recovered after decomposition — no volatilization occurs. The EPA has not issued specific guidance comparing NOR to cremation on mercury, but the absence of a combustion pathway is well-documented in published NOR science.

Who Actually Regulates NOR Right Now?

In the 14 states where NOR is legal as of April 2026, regulation is handled by state environmental and health agencies:

Washington: Department of Ecology (WAC 173-350-240) — the pioneering framework, in place since 2020
Colorado: Department of Public Health and Environment (CDPHE)
Oregon: Department of Environmental Quality (DEQ)
Remaining 11 states: Respective state environmental or health agencies, each with adopted rules

These agencies set operational standards, issue licenses or permits, and enforce compliance. They draw on EPA composting guidance and, in many cases, consulted with the EPA and with Washington’s DOE during their rulemaking — but the regulatory authority is state, not federal.

This is consistent with how many environmental programs work in the U.S.: the EPA provides guidance and sets baseline national standards in some areas, while states develop and enforce regulations within those parameters.

How Does EPA Composting Guidance Inform NOR Safety Standards?

The EPA’s composting guidance identifies pathogen reduction as the central safety benchmark:

Temperatures must reach and sustain 55°C (131°F) throughout the composting mass
Duration at thermophilic temperatures must meet minimum thresholds based on system type
Finished material should be tested for indicator organisms (fecal coliforms, Salmonella) to verify pathogen reduction

NOR operators are expected to meet these benchmarks. State regulators who have adopted NOR rules require facilities to document process monitoring and demonstrate compliance. The EPA has not issued NOR-specific guidance that supersedes this framework — and it has not issued anything that contradicts it, either.

How Do NOR’s Emissions Compare to Cremation?

Cremation produces measurable air emissions. Mercury vapor from dental amalgam is the most discussed; studies have estimated that cremation is among the largest sources of mercury air deposition in some regions. The EPA has documented this in the context of medical waste incinerator regulations.

NOR does not involve combustion, so it does not produce this emissions profile. Metals remain in solid form and are recovered after decomposition. Advocates for NOR have noted this in petitions and public comment periods at the EPA and other federal agencies.

As of 2026, the EPA has not issued specific guidance formally acknowledging NOR’s lower emissions profile compared to cremation — but the scientific basis for that comparison is well-established in peer-reviewed research, including the 2021 WSU life cycle assessment.

What Might Change at the Federal Level?

As NOR scales from a handful of providers to an increasingly mainstream option in 14 states, federal regulatory attention is likely to increase — though pace is uncertain. Possible future federal involvement includes:

EPA-specific guidance for NOR facilities — analogous to existing composting guidance but written specifically for human NOR
Federal environmental recognition of NOR’s lower footprint — NOR advocates including the Natural Resources Defense Council (NRDC) have engaged federal agencies on this point
Potential inclusion in federal sustainability frameworks — unlikely near-term, but plausible as NOR scales

Families and funeral professionals who want to see NOR recognized at the federal level can contact their congressional representatives and participate in EPA public comment processes when relevant rulemaking is opened.

What Does the Current Regulatory Landscape Mean for Families Choosing NOR?

The practical implication of the current regulatory landscape: NOR is regulated, but by your state, not the EPA. If you live in one of the 14 states where NOR is legal, your state’s environmental agency has established rules that licensed NOR providers must follow. The safety standards those rules are built on — EPA composting pathogen benchmarks — are legitimate, well-established, and enforced at the state level.

The absence of a dedicated EPA regulation is not a safety gap. It reflects how new NOR is as a scaled, legal industry. The regulatory framework is functioning and evolving.

Learn more about terramation providers near you

FAQ

Is terramation regulated by the EPA?

Not directly. The EPA has no dedicated rule for NOR as of 2026. NOR facilities are regulated by state environmental agencies, which draw on EPA composting guidance for their pathogen reduction standards. General EPA facility regulations apply to NOR facilities, but there is no NOR-specific federal rule.

Does 40 CFR Part 503 apply to NOR?

No. 40 CFR Part 503 governs sewage sludge (biosolids), not human NOR. However, its pathogen reduction standards are the same as those referenced in general composting guidance — which is what state NOR regulators use as their safety benchmark.

Does terramation produce air emissions?

NOR does not involve combustion, so it does not produce the mercury vapor emissions associated with cremation. Primary outputs are carbon dioxide, water vapor, and heat — significantly lower than flame cremation’s emissions profile per the 2021 WSU life cycle assessment.

Which state has the most developed NOR environmental regulations?

Washington State has the longest-established NOR regulatory framework, in place since 2020 under WAC 173-350-240, administered by the Department of Ecology. It has served as the model for other states and is the most operationally tested as of 2026.

Ready to explore terramation options? Contact TerraCare Partners to learn about licensed providers operating under your state’s regulations.

Sources

U.S. Environmental Protection Agency. “Composting.” EPA.gov. https://www.epa.gov/composting
U.S. EPA. “Biosolids.” EPA.gov. https://www.epa.gov/biosolids
U.S. EPA. “Mercury.” EPA.gov. https://www.epa.gov/mercury
Washington State Department of Ecology. “Natural Organic Reduction Rules (WAC 173-350-240).” ecology.wa.gov. https://app.leg.wa.gov/wac/default.aspx?cite=246-500
Colorado Department of Public Health and Environment. “Natural Reduction of Human Remains.” cdphe.colorado.gov. https://cdphe.colorado.gov/
Oregon Department of Environmental Quality. “Natural Organic Reduction.” oregon.gov/deq. https://www.oregon.gov/deq/
Moles, S., et al. “Natural Organic Reduction: Life Cycle Assessment.” Washington State University, 2021.
Natural Resources Defense Council. “Natural organic reduction.” NRDC.org. https://www.nrdc.org/
U.S. EPA. “Mercury — Sources of Mercury Emissions.” EPA.gov. https://www.epa.gov/mercury
Moles, S., et al. “NOR Environmental Data.” Washington State University NOR Research Publications.