Animal Waste Disposal Laws in Michigan: Manure, Carcass, and CAFO Rules Explained
September 27, 2026
If you own even a handful of livestock in Michigan, a dead animal left in a field for more than a day can trigger a criminal misdemeanor charge. Animal waste disposal laws in Michigan cover far more than manure spreading schedules; they dictate exactly how many hours you have to bury, compost, or render a carcass, how far your manure pile must sit from a drinking well, and which state agency shows up if you get it wrong.
Whether you run a small hobby farm, manage a dairy herd, or operate a permitted feeding operation, the rules come from several overlapping sources: the Bodies of Dead Animals Act, the Generally Accepted Agricultural and Management Practices, and the Natural Resources and Environmental Protection Act. This guide walks through what each one requires, who enforces them, and how to verify you’re still following the current version.
What Michigan Requires for Livestock Waste and Dead-Animal Disposal
Michigan regulates dead-animal disposal primarily through the Bodies of Dead Animals Act (BODA; Act 239 of 1982, as amended). The Bodies of Dead Animals Act regulates the management of dead animals in Michigan, and the intent of this law is to protect human and animal health, reduce risk of disease transmission, control flies, vermin, and scavengers, and protect ground and surface water and air quality.
Under this act, there are currently six alternatives for dead animal disposal in Michigan: burial, incineration, rendering, land-fill, composting, and anaerobic digestion. Not every method fits every situation. A backyard flock owner and a 500-head dairy operation face very different logistics, which is why the statute also limits what counts as farm mortality in the first place.
Farming mortality must only be those animals “intrinsic to an operation under common ownership or management,” though carcasses may originate from multiple farm sites and be a mixture of livestock species if all are owned by the same operation. If you keep goats alongside cattle or run a mixed poultry-and-swine operation covered under backyard pig laws in Michigan, this common-ownership rule usually lets you dispose of both species together under the same plan.
Disease reporting adds another layer. Any increase in normal natural daily mortality, due to any cause known or unknown, must be reported to the MDA Director immediately as a biosecurity measure intended to protect the state’s animal agriculture industry. If you’ve reviewed brucellosis laws in Michigan, you already know how seriously the state treats early disease detection in livestock herds, and this reporting duty works the same way.
Manure Storage, Stockpiling, and Land-Application Rules in Michigan
Manure management sits under Michigan’s Generally Accepted Agricultural and Management Practices, a set of standards first adopted in June 1988, since careful storage, handling, and land application of manure is needed to utilize nutrients, control odors, and protect water resources. These practices include recommendations for runoff control, odor management, manure storage facility design, manure application to land, record keeping, and manure management system plans.
Runoff control isn’t optional once your operation crosses a certain threshold. Runoff control is required for any facility if runoff from a lot leaves the owner’s own property or adversely impacts surface and/or groundwater quality, including runoff to neighboring land or a roadside ditch. To meet that standard, the GAAMPs use nationally recognized construction and management standards to provide runoff control for a 25-year, 24-hour rainfall event.
If you stockpile manure in a field before spreading it, the GAAMPs set specific physical and timing limits:
- When initially placed in the field, stockpiles should be at least 6 feet high and have a conical shape, since moderate compaction and a sloped surface enhance the shedding of precipitation and lessen leaching.
- Stockpiled manure must be spread onto fields within six months of initial pile placement if uncovered, or within twelve months if covered with an impermeable cover for the additional time until spread.
- Timely application of stockpiled manure to land at agronomic rates and soil incorporation within 48 hours after application helps control odors and supports nutrient management goals.
Pro Tip: Cover stockpiled manure with an impermeable tarp if you can’t spread it within six months. Covering buys you an extra six months of storage time while cutting nutrient leaching, according to the state’s manure GAAMPs.
If you’re also managing grazing boundaries near stockpile sites, cross-reference your setup with livestock fence laws in Michigan so runoff and containment rules line up on the same property plan.
How You Must Dispose of Dead Livestock Carcasses in Michigan
Michigan law requires that all dead animals be disposed of within 24 hours after death, and burial must be no less than 2 feet below the natural surface of the ground according to promulgated rules. That deadline surprises a lot of new producers, but there are three built-in exceptions.
Dead animals may be kept in secured temporary cold storage of 40 degrees Fahrenheit or below for a maximum of 7 days, or frozen and securely stored at 0 degrees Fahrenheit or below for a maximum of 30 days before you have to finalize disposal. The other two exceptions cover small mammals, deer, and birds taken under a damage and nuisance animal control permit, and small mammals, cervidae, and birds that are road kill. If a deer carcass ends up on your property after a vehicle strike, the rules in roadkill laws in Michigan explain who’s responsible for removal.
For burial specifically, individual and common graves each carry their own requirements:
- The dead animal must not come in contact with waters of the state.
- The number of individual graves per acre must not exceed 100, and the total combined animal weight must not exceed 5 tons per acre.
- Individual graves must be separated by a minimum of 2 1/2 feet.
- A grave must not be located within 200 feet of any existing groundwater well used to supply potable drinking water.
- Dead animals buried in a common grave must be covered with at least 1 foot of soil within 24 hours of burial.
Beyond burial, rendering requires a licensed hauler. If a mortality is sent for rendering, the rendering service used must be a licensed dead animal dealer, and rendering availability is typically based on volume, so it’s used more often by large farms. Landfill disposal works too, but landfills should be contacted ahead of time to ensure they accept dead animals, since some do not.
Composting became a formal option more recently. MDARD’s rules entitled “Bodies of Dead Animals” for on-farm composting were approved on September 26, 2007, and provide for composting of dead animals and animal tissue within a structure, in open piles, windrows, and contained vessels. These alternatives were designed to assist producers who have no rendering services, licensed landfills that accept dead animals, or soil types suitable for proper burial.
Important Note: Anaerobic digestion is listed among BODA’s disposal methods but has historically required its own rule promulgation before producers could rely on it as a standalone compliance option. Confirm current status with MDARD before choosing this route for carcass disposal.
Transportation carries its own compliance burden if you’re moving carcasses off-site. Vehicles used for transportation must be leak-proof and covered to prevent exposure to the environment, which helps minimize the risk of contamination to water sources and the spread of pathogens. MDARD also mandates the maintenance of transportation records, including the date, time, location of pickup and delivery, and the chosen disposal method.
Which Agency Regulates Manure and Carcass Disposal in Michigan
Two state departments split this responsibility. The Michigan Department of Agriculture and Rural Development (MDARD) administers BODA and the GAAMPs, while the Department of Environment, Great Lakes, and Energy (EGLE) oversees water-quality discharge permits under state environmental law.
| Agency | Primary Role | Key Statute or Program |
|---|---|---|
| MDARD | Dead-animal disposal, on-farm composting rules, GAAMPs, livestock siting | Bodies of Dead Animals Act; Right to Farm Act |
| EGLE | Water discharge permits, CAFO oversight, groundwater protection | NREPA Part 31 (Water Resources Protection) |
| Local health departments | Sanitary code enforcement, on-site nuisance complaints | County/district sanitary codes |
The GAAMPs are referenced in Michigan’s Natural Resources and Environmental Protection Act, which protects the state’s waters from releasing pollutants in quantities or concentrations that violate established water quality standards, and discharges are regulated as violations of the Part 4 Water Quality Standards rules under Part 31. That’s why a manure runoff complaint can pull in EGLE even though MDARD wrote the underlying agricultural practice standard.
For large-scale emergencies, the agencies coordinate directly. A memorandum between MDA, MDEQ, and the Michigan Department of Natural Resources was entered into in September 2004 to define their respective roles when mass carcass disposal is needed because of a major animal health emergency, such as a foreign animal disease or natural disaster. If you’re weighing how enforcement escalates for neglected animals generally, animal cruelty laws in Michigan outline the parallel welfare-side penalties that can apply alongside waste violations.
Water Setbacks, Groundwater Protections, and Health Standards in Michigan
Groundwater protection runs through nearly every disposal rule in the state. For individual carcass graves, a grave cannot be located within 200 feet of any existing groundwater well used to supply potable drinking water, and the dead animal cannot come in contact with waters of the state at all.
For permitted livestock operations, the setback structure gets more layered. Setbacks to protect surface water are already included in the NPDES permit, while additional setback requirements in the Part 22 Rules are added to the permit specifically for protection of groundwater. Fields receiving CAFO waste also face a technical screening step: R 323.2218 requires the completion of a hydrogeologic study on all property used for the disposal of waste.
These layered protections exist because nutrient loading is a real threat to drinking water. When manure is applied under frozen or saturated conditions, it cannot absorb into the soil, increasing the risk that it will wash off and contaminate groundwater. That single fact is behind some of the newest rule changes discussed below.
Key Insight: Setback distances differ by disposal type. A 200-foot well setback applies to individual carcass graves, while CAFO land-application fields face separate groundwater setbacks layered on top of surface-water setbacks already written into the NPDES permit.
If your property sits near a shared water source and you’re also dealing with a neighbor’s animals crossing onto your land, neighbor’s dog on my property laws in Michigan covers a related but distinct set of property-boundary questions that often come up alongside waste and runoff disputes.
CAFO and Nutrient Management Plan Requirements in Michigan
Concentrated Animal Feeding Operations face the strictest tier of Michigan’s animal waste rules. These operations need discharge permits under Part 21 (Wastewater Discharge Permits) and must follow the land-application standards in Part 22, where control of the application of waste is required to remain with the owner or certified operator.
Nutrient planning documents matter here too. Manure Management System Plans (MMSP) and Comprehensive Nutrient Management Plans (CNMP) serve related but distinct purposes, and larger operations typically need the more detailed CNMP to satisfy permit conditions. Producers who follow these plans in good faith gain a legal benefit: agricultural producers who voluntarily follow the GAAMPs are protected from public or private nuisance litigation under the Michigan Right to Farm Act.
Michigan’s CAFO rules changed significantly in a rulemaking finalized after a lengthy court fight. The ban on winter manure applications is part of a broader win in Michigan for the environment and human health, after regulators finalized stricter pollution controls for the state’s largest livestock operations following a lengthy court battle. The updated framework adds several new obligations:
- EGLE may now require CAFOs to conduct groundwater monitoring to ensure operations do not pollute drinking water sources.
- CAFOs must notify EGLE before spreading waste on high-risk fields, allowing for timely inspections and stronger compliance.
- A ban on “manifesting,” or transferring, CAFO waste to other parties during winter months ensures manure remains under permit oversight during the highest-risk season.
Farm advocacy groups continue to push back on parts of this framework. Michigan Farm Bureau has publicly opposed EGLE implementing rules and policies that exceed federal mandates and are not supported by scientific evidence, including any classification of manure, sand, or ag processing by-products as hazardous waste. If your operation is expanding and you’re weighing housing changes for breeding stock, dog-breeding laws in Michigan illustrate how a different sector’s siting and waste-handling rules follow a similar permit-first logic.
Penalties for Illegal Dumping, Missed Carcass Deadlines, and Water Violations in Michigan
Penalties escalate quickly for repeat violations, and Michigan splits them across several statutes depending on what happened and where.
| Violation | Governing Law | Penalty |
|---|---|---|
| BODA disposal violation (first offense) | Bodies of Dead Animals Act | Misdemeanor; minimum $300 fine or 30 days imprisonment, or both |
| BODA disposal violation (3+ convictions) | Bodies of Dead Animals Act | Felony; up to 1 year imprisonment or $2,000 fine, or both |
| Placing a carcass in water or near a residence | MCL 750.57 | Misdemeanor; $50–$500 fine or up to 90 days; each 24 hours is an additional offense |
| Dumping filth or refuse on another’s property | MCL 750.552a | Misdemeanor |
A person violating BODA is guilty of a misdemeanor punishable by a minimum fine of $300 or imprisonment for a minimum of 30 days, or both, and three or more convictions for violating BODA becomes a felony punishable by imprisonment for up to one year or a fine of up to $2,000, or both.
The waterway-specific statute is even more granular about ongoing violations. A person who places a dead animal or carcass into a lake, river, creek, pond, road, street, or field—unless buried at least 4 feet underground—commits a misdemeanor, and every 24 hours that the carcass remains after conviction is an additional offense punishable by a fine of $50 to $500 or up to 90 days’ imprisonment.
Separately, any person who dumps, deposits, or places filth, garbage, or refuse on the grounds of another person without specific permission is guilty of a misdemeanor under Michigan’s general dumping statute. Transportation violations get the same treatment: non-compliance with transportation regulations can result in penalties comparable to those for improper disposal.
Common Mistake: Producers often assume the 24-hour disposal clock only applies to large livestock. It applies to essentially all farm mortality, and the fines under BODA plus MCL 750.57 can stack if a carcass both misses the deadline and ends up near water.
How to Confirm Current Michigan Animal-Waste Rules With the Agencies
The GAAMPs aren’t static documents. MDARD has issued updated manure management and nutrient utilization editions multiple times in recent years, including versions referencing Part 31 of NREPA and the Nutrient GAAMPs published for 2026, alongside earlier 2021, 2023, and 2024 editions covering the same core practices. Relying on an old printout is one of the easiest ways to fall out of compliance without realizing it.
Before you finalize a manure storage design or carcass disposal plan, take these steps:
- Check MDARD’s Generally Accepted Agricultural and Management Practices page for the current-year GAAMPs booklet covering manure management, nutrient utilization, and care of farm animals.
- Review the dead-animal disposal rules directly on MDARD’s Disposal of Dead Animals page, which lists composting, burial, and rendering options currently recognized under BODA.
- Contact your regional EGLE district office or check the EGLE CAFO permit updates if your operation is a permitted feeding operation, since Part 22 land-application rules have changed recently.
- Ask your local MSU Extension office to confirm setback, stockpile, and recordkeeping details specific to your county’s soil and groundwater conditions.
If you’re also researching how state wildlife and pet-related statutes intersect with farm property, a broader look at pet laws in Michigan can help you separate companion-animal rules from the livestock-specific requirements covered here. Producers dealing with predator pressure near livestock waste storage areas may also want to review coyote hunting laws in Michigan, since carcass odor from improperly managed disposal sites can attract wildlife activity that triggers separate regulations.
Important Note: This article summarizes Michigan statutes, administrative rules, and GAAMPs as reflected in state agency publications and legal research current as of this writing. It is not legal advice. Confirm specific compliance obligations with MDARD, EGLE, or a Michigan agricultural attorney before making disposal or permitting decisions.
Michigan’s animal waste framework asks a lot of producers: a 24-hour disposal clock, specific burial depths and well setbacks, stockpile timing limits, and—for permitted operations—an expanding list of CAFO-specific groundwater safeguards. None of it is optional once your operation crosses the relevant threshold, and the penalties for skipping a step scale from a misdemeanor fine to felony exposure on repeat violations. Building a written disposal and manure plan around the current GAAMPs, checking it against MDARD and EGLE guidance each year, and keeping transportation and mortality records on hand will keep most operations well inside the law.