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

If you keep livestock in Minnesota, you have exactly 72 hours to legally dispose of an animal that dies on your property, unless you’ve made other arrangements approved by the state. That single deadline sits at the center of a much larger regulatory system covering manure storage, land application, and carcass handling that touches nearly every hobby farm, feedlot, and backyard flock owner in the state.

Understanding animal waste disposal laws in Minnesota matters whether you’re managing a 40-head cattle operation, keeping a couple of goats on five acres, or running a small poultry flock. Two state agencies split enforcement, dozens of technical rules govern where and how you can store or spread manure, and penalties for getting it wrong range from a petty misdemeanor to costly water-quality enforcement actions.

What Minnesota Requires for Livestock Waste and Dead-Animal Disposal

Minnesota splits animal waste regulation into two distinct tracks: live manure management and dead-animal disposal. The Minnesota Pollution Control Agency is established in Minnesota Statutes, chapter 116, and it oversees manure storage, land application, and feedlot construction. The Minnesota Board of Animal Health handles what happens after an animal dies. A person owning or controlling a domestic animal that has died or been killed other than by being slaughtered for human or animal consumption must dispose of the carcass within 72 hours unless other arrangements for disposal have been approved by the board. That rule applies to cattle, swine, poultry, and other farmed livestock, and it exists because proper disposal of domestic animal carcasses is an important part of preventing the potential spread of disease and protecting air and water quality.

These rules apply broadly across livestock types, so whether you’re raising backyard pigs or keeping dairy goats under Minnesota’s goat ownership laws, the same manure-management and carcass-disposal framework applies once you own livestock, even at a small scale. Larger producers face additional permitting layers tied to how many animal units they hold, which we’ll cover further down.

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

Manure storage and land application fall under Minnesota Rules Chapter 7020, the state’s feedlot rule. Everyone who applies manure to cropland must observe application setbacks to water features and apply at agronomic rates. That requirement applies whether you’re a small livestock owner spreading manure on a few acres or a large operation managing thousands of tons a year.

If you hold a feedlot permit, the obligations get more specific. When a feedlot owner applies for a permit, they must develop and maintain a manure management plan. The state now runs this through an online Nutrient Management Tool, and permit applications submitted to the MPCA will be required to utilize this tool to develop an MMP.

Recordkeeping thresholds kick in at a specific size. Land application records are required to be kept by any feedlot with 100 or more animal units, and anyone that receives and land applies manure from a feedlot with 100 or more animal units. Testing schedules follow a similar pattern: manure testing is required for facilities or manure storage areas of 100 animal units or more, required annually for three years, and can then be reduced to once every four years.

Hauling manure on public roads carries its own rule. Animal manure hauled on federal, state, or local highways, roads, or streets must be hauled in such a way as to prevent manure from leaking, spilling, or otherwise being deposited in the right-of-way, and manure deposited on a public roadway must be removed and properly disposed of by the hauler of the manure. If you farm in Minnesota’s karst region, siting rules for manure storage areas get stricter because of the region’s vulnerability to groundwater contamination, per the state’s feedlot construction and interim permit guidance.

Pro Tip: Even if you’re not required to hold a feedlot permit, developing a basic manure management plan protects your soil investment and keeps you ahead of setback violations if your operation grows.

How You Must Dispose of Dead Livestock Carcasses in Minnesota

The 72-hour clock starts the moment an animal dies. The following are all legal methods of disposal for poultry, swine, cattle, horses, sheep, goats and farmed cervids, and household pets and wild animals are exempt by law. If you find a dead pet, consult city ordinance for household pets, and if you find dead wildlife, contact local animal control for wild animals. Minnesota’s wildlife removal laws and nuisance wildlife laws cover those situations separately from the livestock rules discussed here.

For livestock, four disposal methods are legal in Minnesota:

• Burial: Before digging, request an emergency locate from Gopher State One Call to find any power, pipe, or communications lines buried under your chosen site. Buried carcasses must be 5 feet above the seasonal high groundwater level measured from the excavation bottom, maintain at least 10 feet vertical separation from bedrock, and be covered immediately with enough soil to keep scavengers out.
• Composting: This method layers a carbon source with the carcass. Carcasses or discarded animal parts and litter plus bulking agent are added in layers so that the carbon to nitrogen ratio is in the range of 15:1 to 35:1, with an optimal ratio of 23:1, and carcasses must be kept six inches from the edges and sealed with litter. A sheep producer may compost sheep carcasses owned by the producer on the producer’s land without a permit, which extends similar practical flexibility to other species when handled correctly.
• Rendering: A licensed rendering company hauls carcasses away for processing. To prevent disease spread and keep roads clean, livestock carcasses and animal parts are transported in leak-proof vehicles or containers and covered.
• Landfill disposal: Some landfills accept livestock carcasses, but you should contact the individual landfill before delivering any livestock carcasses for disposal.

Alternative methods exist too. Alternative methods of mortality disposal, including but not limited to pet food processing, fur farm consumption, lactic fermentation, extrusion, and experimental composting, require a permit from the Minnesota Board of Animal Health. If the death was caused by roadkill on a public route, Minnesota’s roadkill laws direct you to a different contact than on-farm mortality, since the road authority handles road kill.

Which Agency Regulates Manure and Carcass Disposal in Minnesota

Two agencies split jurisdiction, and knowing which one to call saves time when you have a compliance question. The Minnesota Pollution Control Agency regulates manure, feedlot construction, and water-quality permitting under Chapter 7020. The Minnesota Board of Animal Health regulates carcass transport and disposal under its own rules. Minnesota Statutes, Section 35.03, requires the Minnesota Board of Animal Health to adopt rules necessary to protect the health of Minnesota’s domestic animals. Separately, the board, through its executive director, may issue permits to owners of rendering plants located in Minnesota to transport carcasses of domestic animals and fowl over the public highways to their plants for rendering purposes.

Day-to-day feedlot oversight often runs through county government rather than the state office directly. The MPCA has delegated authority to issue construction short-form and interim permits to some counties, and the process for obtaining a permit is primarily dependent on whether the feedlot is located in a delegated county. Your county feedlot officer is usually your fastest point of contact for manure storage and permitting questions, while enforcement matters tied to animal welfare more broadly fall under Minnesota’s animal cruelty laws, a separate but sometimes overlapping legal framework.

Water Setbacks, Groundwater Protections, and Health Standards in Minnesota

Groundwater protection drives much of Minnesota’s manure and carcass regulation. On the carcass side, burial sites must maintain 5 feet of separation above the seasonal high groundwater level and 10 feet of vertical separation from bedrock specifically to keep decomposition byproducts out of drinking water aquifers.

On the manure side, buffer distances protect surface water directly. Restrictions on manure application do not apply if a 100-foot non-manured vegetative buffer is maintained along lakes and streams, or a 50-foot non-manured vegetative buffer along intermittent streams and protected wetlands. Feedlots also face direct restrictions on livestock access to water bodies: animals of a CAFO or of a facility capable of holding 1,000 or more animal units must not be allowed to enter waters of the state, and animals of a non-CAFO animal feedlot must be fenced to prohibit entry to certain classified lakes.

These water protections intersect with Minnesota’s broader Groundwater Protection Rule from the Department of Agriculture. As one industry representative explained regarding fall fertilizer restrictions, “you’re not allowed to apply commercial fertilizer during the fall time without some of these practices,” which has pushed many farmers toward using livestock manure to fill their nutrient plans instead. That shift makes understanding land-application setbacks even more important if you’re relying on manure as your primary nutrient source.

Pro Tip: Before choosing a burial or storage site, check whether your property sits in Minnesota’s karst region or a designated vulnerable groundwater area — both carry tighter siting rules than the statewide baseline.

CAFO and Nutrient Management Plan Requirements in Minnesota

Concentrated Animal Feeding Operations face the most detailed permitting requirements in the state. Animal feedlots, including CAFOs, are regulated under Chapter 7020 of the Minnesota Rules, which detail state and federal permitting requirements and prescribe discharge, design, construction, operation, and closure requirements for covered feedlots, manure storage areas, manure composting sites, and manure land application activities.

Permit timelines have shifted recently. The MPCA finalized new State Disposal System and National Pollutant Discharge Elimination System feedlot general permits, with the new state SDS general permit becoming effective June 1, 2025, and the new federal NPDES general permit effective February 1, 2026. You can review current application details through the state’s Feedlot NPDES and SDS Permits licensing page.

Beyond the permit itself, CAFOs carry ongoing plan obligations. All CAFOs and NPDES permitted feedlots must include a description of soil conservation practices in their nutrient management plans, and within one year of ceasing operation, a facility must remove and land apply manure and manure-contaminated soils from manure storage areas and animal holding areas. Rulemaking on this front isn’t static: the public was able to submit written comments on planned feedlot rule amendments until July 22, 2025, and a proposed rule is not anticipated to be completed until 2027, so CAFO operators should expect the setback and permitting landscape to keep evolving over the next several years.

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

Minnesota treats illegal carcass dumping as a criminal offense, not just a regulatory infraction. Whoever unlawfully deposits garbage, rubbish, offal, or the body of a dead animal in or upon any public highway, public waters, shoreland areas, public lands, or without consent, private lands or water, is guilty of a petty misdemeanor. A related statute governing roadways adds detail: no person shall throw, deposit, place, or dump upon any street or highway or adjacent land without the owner’s consent any carcass of any dead animal, offal, or other offensive matter. If material does end up on a roadway, the person responsible must immediately remove it or cause it to be removed.

Manure-related violations carry their own consequences, particularly around water quality. Feedlot owners are required to ensure manure application is done appropriately, and if a manure recipient consistently fails to comply, the MPCA can take enforcement action directly against that recipient. Combined with the hauler’s duty to clean up spilled manure on public roads, this means liability doesn’t necessarily end once manure leaves your property. These enforcement principles apply just as firmly to wildlife-adjacent situations, including carcasses left after activities covered by Minnesota’s hunting laws, coyote hunting laws, or duck hunting laws, where improper disposal of remains can trigger the same dumping statutes.

Important Note: This article summarizes state-level requirements for general informational purposes and is not legal advice. Local ordinances, county delegated authority, and site-specific conditions can add requirements beyond what’s covered here, so confirm details with the relevant agency before making disposal decisions.

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

Because permitting deadlines, buffer distances, and rule amendments shift over time, verifying current requirements directly with the agencies is worth the extra step before you build a manure storage structure or choose a carcass disposal method. This may not be a complete list of all required permits, so contact the MPCA, your county feedlot officer, and local zoning officials for information about other possible requirements, such as setbacks from residential areas, other local zoning regulations, and stormwater pollution prevention controls.

For carcass-specific questions, the Board of Animal Health remains your primary contact, and its field staff can walk you through composting, rendering, or burial options for your specific situation. The Minnesota Pollution Control Agency also maintains a map of potential locations for disposal of animal carcasses during emergency events, which is useful during disease outbreaks or mass mortality events when normal disposal routes get overwhelmed. Because rulemaking is active, checking in periodically matters: the MPCA hosted an online informational session regarding planned amendments and has yet to issue a proposed rule while soliciting public comment. A quick call or email to your county feedlot officer or the Board of Animal Health before a construction project, large land application, or unusual mortality event helps you avoid the penalties and enforcement actions covered above.

Question	Agency to Contact
Manure storage, setbacks, CAFO permits	MPCA / county feedlot officer
Carcass disposal method, composting, rendering	Minnesota Board of Animal Health
Road-related dumping or spills	Local road authority
Household pet or wildlife carcasses	City ordinance office / local animal control

Getting these calls right the first time is far cheaper than correcting a violation after the fact. Whether you’re managing a small hobby farm or a permitted CAFO, the same underlying principle applies across Minnesota’s animal waste disposal laws: know your deadline, know your setback, and know which agency to call when a question comes up that this overview didn’t fully answer.