Colorado Animal Waste Disposal Laws: Manure, Carcass, and CAFO Rules Explained

If you raise livestock in Colorado, more than one agency has a say in what happens to manure and dead animals on your property. Animal waste disposal laws in Colorado split oversight between the Colorado Department of Agriculture, the Colorado Department of Public Health and Environment, and your county health department, and each one enforces a different piece of the puzzle. Miss the wrong requirement, and you could face a solid waste violation even if you thought you were following the rules.

This breakdown walks through what the state actually requires for manure storage, carcass burial, CAFO permitting, and water protection, using the current regulatory text from Colorado’s own agencies. You’ll also find out which office to call when a rule doesn’t seem to match what you’ve read online.

What Colorado Requires for Livestock Waste and Dead-Animal Disposal

Colorado treats manure and carcasses as two separate regulatory categories, and the rules that apply depend heavily on context. Manure that stays on a working farm and gets returned to the soil is generally handled as an agricultural byproduct rather than waste. Colorado regulations define “manure” as accumulated animal excrement, which includes feces and urine, as well as any bedding material, spilled feed, or soil that is mixed with feces or urine.

Dead animals are treated differently once they can no longer serve their original purpose. Carcasses disposed of due to mortality or disease unrelated to an all-hazards event, or that cannot be used for their original intended purpose, are considered solid waste and must be managed under the Colorado Solid Waste Act and its implementing regulations. That single distinction determines whether you’re following farm-level guidance or full solid waste compliance rules.

Manure that’s zoned agricultural and applied as fertilizer gets its own carve-out. Colorado’s agricultural waste definition covers manures that are returned to the soils as fertilizer or soil conditioners, and separately agricultural waste also includes all carcasses and carcass by-products resulting from any mass livestock mortality caused by an all-hazards event or depopulation ordered by the state veterinarian. If you’re running a mixed operation with poultry, goats, or open-range cattle, these categories often overlap, so it helps to review how your specific operation is classified through resources like open-range laws in Colorado and livestock microchipping laws in Colorado, since traceability requirements often intersect with waste and mortality reporting.

Pro Tip: Keep a simple written log of mortality dates, disposal methods, and manure application timing. If a county or state inspector ever asks how you handle waste, a dated record is far more persuasive than a verbal explanation.

Manure Storage, Stockpiling, and Land-Application Rules in Colorado

Where you store manure matters as much as how you dispose of it. Colorado’s animal feeding operation regulations define a “production area” that includes the manure storage zone, and the manure and residual solids storage area includes lagoons, runoff ponds, liquid impoundments and tanks, storage sheds, under-house or pit storage, and stockpiles, static piles, and composting piles. That means even a simple stockpile behind a barn falls under the same regulatory framework as a lined lagoon on a larger operation.

Composting is a recognized management option, but it isn’t unregulated. Under Colorado’s solid waste rules, agricultural wastes, including animal manures, that are returned to the soils as fertilizer, soil conditioners, or compost are addressed under Section 14 of 6 CCR 1007-2, Part 1. If you’re composting carcasses along with manure, that activity typically needs to stay on your own property and follow the same siting logic as other manure storage.

Land application carries its own standard. Best management practices under Colorado’s animal feeding operation regulation call for collecting and evenly applying wastewater to land application sites at agronomic rates, meaning you apply only as much nutrient as the crop or pasture can actually use. Operations are also expected to minimize runoff through practices like:

• Constructing roofed areas over animal confinement areas everywhere practicable
• Repairing or adjusting waterers and water systems to minimize water wastage
• Using the lowest practical amounts of water for manure and wastewater flushing
• Preventing animals from having direct contact with surface water, except at a designated stock watering point

If you keep backyard poultry or dairy goats alongside larger livestock, manure volume and storage rules can look different at a smaller scale. It’s worth cross-checking your setup against backyard chicken laws in Colorado and goat ownership laws in Colorado before assuming a large-operation stockpiling rule doesn’t apply to you.

How You Must Dispose of Dead Livestock Carcasses in Colorado

When an animal dies outside of a disease outbreak or disaster event, you generally have a handful of state-recognized options, and the right one depends on your county, soil, and the animal’s size. Burial is the most common method, and Colorado’s carcass disposal guidance from the Colorado Department of Public Health and Environment sets specific physical standards: burial pits must be covered with a minimum of two feet of soil, and all carcasses must be buried at least 150 feet away from any water supply source.

Composting is also permitted in many cases. Composting of carcasses may be allowed on your own property, though the specifics depend on your operation and local requirements. According to guidance summarized by the Colorado Department of Agriculture, Colorado law and CDA guidance recognize several approved methods for dead animal disposal, and the method you use may depend on the size of the animal, your location, local ordinances, and whether the animal died of a suspected or confirmed reportable disease.

Burial specifically comes with a county-level caveat. Burial is permitted in many Colorado counties, subject to local regulations regarding depth, proximity to water sources, and soil conditions, so you should always check with your county before burying large animals. Practical field guidance from local authorities adds a few more layers to safe handling: carcasses should be arranged individually in rows and not stacked on top of one another, and carcasses should be located in the shade whenever possible to slow decomposition and odor.

Wildlife access is a separate concern built into the disposal method itself. State biosecurity guidance instructs producers to dispose of dead animals where wildlife cannot feed on them, since scavengers feeding on carcasses can spread pathogens across a wide geographic area, with severe regulatory consequences in cases involving reportable diseases like chronic wasting disease. If scavenging wildlife is a recurring issue on your property, it’s worth reviewing nuisance wildlife laws in Colorado alongside your disposal plan, and if the animal died along a roadway rather than on your land, roadkill laws in Colorado cover a different set of removal responsibilities entirely.

Pro Tip: Before burying a large animal, call your county environmental health office first, not last. Depth, water-source distance, and soil-type rules vary enough between counties that a method legal on one side of a county line can be a violation on the other.

Which Agency Regulates Manure and Carcass Disposal in Colorado

Two state agencies split responsibility here, and knowing which one to contact saves a lot of time. The Colorado Department of Agriculture regulates carcass disposal under normal, routine mortality circumstances. Meanwhile, wastewater discharge, manure storage design, and CAFO permitting fall to the Colorado Department of Public Health and Environment’s Environmental Agriculture Program, which oversees CAFOs that must either register or apply for a discharge permit.

That division of labor shifts during a major event. Large quantities of animal carcasses resulting from an all-hazards event, disease-related mass deaths, or a state veterinarian-ordered depopulation must be managed in a manner that prevents the spread of infection and contamination of soil and groundwater, and during such events the Colorado Department of Agriculture is the lead agency directing all activities related to management and disposal of carcass wastes. The two agencies coordinate through a Memorandum of Understanding regarding storage, treatment, or disposal of livestock carcasses during any all-hazards event.

Local zoning adds a third layer that’s easy to overlook. County health departments and planning offices can impose siting rules on top of state requirements, particularly for larger operations or anything near a residential boundary. If your property abuts other land uses or you’re considering expanding a feeding operation, it’s worth reviewing kennel zoning laws in Colorado for a sense of how local zoning overlays typically interact with state agricultural rules.

Water Setbacks, Groundwater Protections, and Health Standards in Colorado

Water protection runs through nearly every disposal rule in Colorado, and the setback distances differ depending on whether you’re burying a carcass, applying manure to land, or building a storage impoundment. For burial, the standard is straightforward: all carcasses must be buried at least 150 feet away from any water supply source.

Land application of manure and wastewater follows a different, more flexible standard for larger operations. Colorado’s CAFO discharge permit regulation allows facilities to demonstrate that a setback or buffer is not necessary because implementation of alternative conservation practices or field-specific conditions will provide pollutant reductions equivalent to or better than a 100-foot setback, giving operators some flexibility as long as they can show equivalent protection.

Storage impoundments face their own siting rules tied to groundwater depth. Under Colorado’s animal feeding operation regulation, earthen-lined impoundments at new source CAFOs cannot be located where the seasonally high groundwater level would be too close to the base of the impoundment, unless site conditions and constraints justify an exception.

Important Note: Colorado’s surface water and groundwater protections aren’t handled under the same permit. Regulation 81 was revised specifically because federal CAFO rules address surface water, while CAFO regulations focused on protection of the nation’s surface waters and did not include provisions for protection of groundwater from pollutants in manure or process wastewater, so groundwater protection provisions cannot be included in a discharge permit and instead remain in Regulation 81 as a separate control regulation. In practice, that means a facility can hold a valid surface-water discharge permit while still needing to separately satisfy groundwater protection standards.

CAFO and Nutrient Management Plan Requirements in Colorado

Whether your operation counts as a CAFO in Colorado depends on animal numbers and manure handling method, not just acreage. For poultry operations specifically, Colorado sets large-CAFO thresholds at 30,000 laying hens or broilers using a liquid manure handling system, 82,000 laying hens if using a non-liquid manure handling system, or 125,000 chickens other than laying hens if using a non-liquid manure handling system. Notably, even facilities that are only above these thresholds periodically, like a backgrounding feedlot, are considered large CAFOs. Poultry keepers scaling up should also review rooster crowing laws in Colorado, since noise ordinances often surface around the same time waste-volume thresholds do.

Once you cross the threshold, Colorado gives you two compliance paths: registration or a full discharge permit. The requirements differ significantly in scope and cost.

Requirement	Registered CAFO	Permitted CAFO
Application	Registration form	Permit application plus Nutrient Management Plan
Core planning document	Facility Management Plan	Nutrient Management Plan
Protection standards	Sections 81.6 and 81.7 of Regulation 81	Section 61.17 (surface water) and 81.7 (groundwater)
Annual reporting	Not specified	CAFO Annual Report due by March 31
Fee structure	$0.06 per head (maximum capacity)	$750 plus $0.09 per head (maximum capacity)

Registered CAFOs must submit a complete registration form, develop and implement a complete Facility Management Plan, meet the surface and groundwater protection requirements of Sections 81.6 and 81.7 of Regulation 81, and pay an annual registration fee of $0.06 per head based on maximum capacity. Permitted CAFOs must submit a complete permit application and Nutrient Management Plan, meet the surface water protection requirements in Section 61.17 of Regulation 61 and groundwater protection requirements in Section 81.7 of Regulation 81, submit a CAFO Annual Report by March 31 each year, and pay an annual permitting fee of $750 plus $0.09 per head based on maximum capacity.

Large permitted operations also carry recordkeeping obligations when manure leaves the property. Prior to transferring manure or process wastewater to other persons, Large CAFOs must provide the recipient with the most current nutrient analysis consistent with the nutrient management plan, and must retain records of the date, recipient name and address, and approximate amount transferred for five years. Storage capacity itself is engineered around a specific weather benchmark, defined in Colorado’s CAFO regulation as a storm of 24-hour duration yielding a total rainfall magnitude with a probability of recurring once every 25 years — commonly called the 25-year, 24-hour storm standard.

Swine operations face an even more detailed track. Colorado’s housed commercial swine feeding operations must obtain an individual discharge permit under Section 61.13 of Regulation 61, develop a Construction Plan, Swine Waste Management Plan, Operations Plan, Monitoring Plan, and Financial Assurance Plan, obtain an operating permit under Regulation 2 Part B, and develop an Odor Management Plan detailing how the facility will minimize odor to the greatest extent practicable.

Penalties for Illegal Dumping, Missed Carcass Deadlines, and Water Violations in Colorado

Because dead animals that don’t qualify for all-hazards handling are legally classified as solid waste, disposing of a carcass outside approved methods can trigger the same enforcement framework as illegal dumping of any other solid waste. Carcasses disposed of due to routine mortality or disease must be managed in compliance with the Colorado Solid Waste Act and its implementing regulations, and stepping outside that framework — dumping in a ditch, burying too close to a well, or skipping burial depth requirements — puts you in violation of state solid waste law rather than a minor farm oversight.

Water discharges carry an additional layer of federal exposure on top of state enforcement. Under the Clean Water Act, any citizen whose health, recreation, or property interest is adversely affected by unpermitted CAFO discharges can file a federal civil lawsuit against the polluter, independent of whatever state-level enforcement action CDPHE pursues. This is not a theoretical risk in Colorado. A 2024 legal complaint filed in Larimer County District Court challenged CDPHE’s decision to strike certain groundwater-related provisions from Regulation 81 and fold impoundment rules into the CAFO general permit, with the litigation specifically scrutinizing whether the state’s monitoring requirements for underground discharges were adequate.

Important Note: Exact civil penalty amounts for solid waste and water quality violations change and depend heavily on the specific statute, the violation’s severity, and whether it’s a first offense. Rather than relying on a fixed dollar figure, confirm current penalty schedules directly with CDPHE’s enforcement section or CDA before assuming what a specific violation might cost. If your operation has faced separate animal welfare complaints tied to neglect or mortality handling, it’s also worth understanding how animal cruelty laws in Colorado intersect with disposal timelines, since delayed carcass removal can sometimes trigger both types of scrutiny at once.

How to Confirm Current Colorado Animal-Waste Rules With the Agencies

Regulations get amended, fee schedules adjust, and county ordinances vary enough that no single article can substitute for a direct check with the agency responsible for your situation. Before finalizing a disposal or storage plan, work through these steps:

1. Contact the Colorado Department of Agriculture’s Animal Health Division for routine carcass disposal questions, especially anything involving a reportable disease or suspected outbreak.
2. Reach out to CDPHE’s Environmental Agriculture Program if your operation is approaching CAFO thresholds, needs to register, or needs to determine whether a discharge permit applies to your setup.
3. Check the current Code of Colorado Regulations text for Regulation 61 and Regulation 81 directly through the Colorado Secretary of State’s rule database, since these are the primary sources agency guidance documents summarize.
4. Call your county health or environmental department for burial depth, setback, and zoning specifics, since these frequently differ from one county to the next even under the same state framework.
5. Ask about cost-share assistance if you’re upgrading manure storage or treatment infrastructure. The Natural Resources Conservation Service notes that AFO and CAFO operations can apply for EQIP financial assistance for the storage, treatment, and utilization of animal waste, which can offset the cost of meeting stricter storage or setback standards.

Getting this right matters beyond avoiding fines. Clean manure handling and proper carcass disposal protect the same wells and streams your neighbors and livestock rely on, and Colorado’s layered agency structure exists precisely because water contamination from agricultural waste doesn’t stay confined to one property line.