California Animal Waste Disposal Laws: Manure, Carcass, and CAFO Rules Explained
November 1, 2026
If you keep livestock, poultry, or a small backyard herd anywhere in California, you are already subject to animal waste disposal laws in California whether you have read a single regulation or not. The rules span state statutes, water board orders, and county health codes, and they cover everything from where you can pile manure to how quickly you must remove a dead cow from your pasture.
Regional Water Boards require CAFOs to self-report their manure production and waste management practices in annual reports, and a 2026 Stanford Law School analysis found that
This guide walks through what state law actually requires for manure, carcasses, CAFO permits, and water protections in California, along with the penalties you risk for getting it wrong and where to check for the most current rules before you act.
What California Requires for Livestock Waste and Dead-Animal Disposal
California does not have one single “animal waste law.” Instead, you are working within a patchwork of the Food and Agricultural Code, Title 14 and Title 27 of the California Code of Regulations, the Porter-Cologne Water Quality Control Act, and whatever ordinance your county has layered on top. According to LegalClarity, California law requires prompt disposal of dead animals and places responsibility squarely on the owner or custodian.
That single sentence captures the spirit of the entire framework: the burden sits with you, not the state, to keep waste and carcasses from becoming a public health or water quality problem. Manure is treated differently from carcasses, and both are treated differently again if your operation qualifies as a Confined Animal Feeding Operation (CAFO). If you also raise backyard poultry, it’s worth reviewing backyard chicken laws in California alongside these waste rules, since coop cleanup and manure storage often fall under the same local nuisance codes.
Livestock owners running cow-calf operations should also cross-reference cattle branding laws in California, since both branding records and waste management fall under the same Food and Agricultural Code framework that the California Department of Food and Agriculture (CDFA) administers.
Pro Tip: Keep a simple log of manure removal dates and carcass disposal methods. If a county inspector or water board investigator ever questions your practices, dated records are your strongest evidence of compliance.
Manure Storage, Stockpiling, and Land-Application Rules in California
Manure management in California is governed primarily by Title 14 of the California Code of Regulations. Under 14 CCR § 17823.1, the manure management practices being performed by the agricultural operation shall be conducted so as to prevent the creation of excessive vectors or other adverse public health/well-being conditions, otherwise manure shall be removed at intervals frequent enough to prevent the occurrence of such conditions. Manure removed from confined animal areas shall be managed so as to prevent the creation of adverse public health/well-being conditions.
In plain terms, you cannot let manure pile up indefinitely. Once it starts attracting flies, generating strong odor, or creating runoff risk, you are expected to remove or manage it before those conditions develop. Santa Clara County’s watershed program frames this bluntly: manure conditions that result in excessive odor, attract flies and other vermin, or release bacteria-laden runoff are nuisance conditions.
Land-application of manure as fertilizer is legal and common, but it has to be consistent with any nutrient management plan covering your operation, and liquid manure storage introduces its own design standard. According to the State Water Resources Control Board’s nonpoint source guidance, liquid manure storage structures should be designed to store facility wastewater and the contaminated runoff from confined animal facilities at all times, up to and including storms exceeding a 25-year, 24-hour frequency event, and should be consistent with nutrient management plans designed for the facility.
If you keep a small herd on residential-zoned land, the same nuisance logic applies at a smaller scale. Owners exploring backyard pig laws in California often discover that manure odor complaints, not the animals themselves, trigger the majority of code enforcement calls.
How You Must Dispose of Dead Livestock Carcasses in California
When an animal dies, your options narrow fast, and the clock starts running immediately. UC Agriculture and Natural Resources guidance notes that regulations state animal carcasses from confined animal operations shall be collected, stored, and removed from the property to an approved processing facility or disposal site prior to the creation of adverse public health/well-being conditions, or processed or disposed of on the property in a manner approved by the Enforcement Agency. For animals on open range, the California Code of Regulations Title 14 § 17823.5 states animal carcasses from animals on pasture or rangeland shall be managed so as to prevent the creation of excessive vectors or other adverse public health/well-being conditions.
Your realistic options break down into four categories:
| Disposal Method | Key Requirement | Best Suited For |
|---|---|---|
| Rendering pickup | Contract with a licensed renderer; fees vary by region and company | Dairy, cattle, and large-animal operations with regular mortality |
| On-site burial | At least three feet of soil cover, no closer than 100 feet from any well | Rural properties without landfill or rendering access |
| Landfill disposal | Only accepted at facilities that take large animals; small animals must be bagged | Small animals under 15 pounds, with prior facility confirmation |
| Composting | Not yet broadly authorized under state law for livestock carcasses | Currently limited; pending legislative change |
For small dead animals, Riverside County Waste Resources explains that individual dead animals weighing less than 15 pounds may be disposed in the general waste stream, though small dead animals must be in sealed waste containers or bags prior to arriving at the landfill. Commercial operations don’t have that flexibility: when rendering plants are not possible, commercial facilities must get prior approval of the California Department of Food and Agriculture.
Composting is the option many ranchers ask about first, and right now it sits in legal limbo. LegalClarity reports that composting livestock carcasses on the farm is an emerging option but not yet widely authorized under state law. A bill introduced in the 2025–2026 legislative session, the C.A.T.T.L.E. Act, would change that by allowing on-farm composting for routine mortality events if operations follow best management practices, but it has not yet become law.
Contagious disease deaths follow a much stricter track. The carcasses of animals with any contagious disease shall be disposed of by means prescribed by the California Department of Food and Agriculture, Division of Animal Industry, under 14 CCR § 17823.5. In practice, that means immediate cremation or burial with no detours: the carcass can only be transported to the nearest crematory, a restriction designed specifically to stop disease from spreading along the transport route. If your losses ever cross into the roadkill category rather than on-farm mortality, the separate roadkill laws in California apply instead.
Which Agency Regulates Manure and Carcass Disposal in California
No single agency owns this issue, which is part of why it confuses so many owners. Four agencies split jurisdiction depending on the type of waste and where it ends up:
| Agency | Primary Jurisdiction |
|---|---|
| California Department of Food and Agriculture (CDFA) | Contagious disease carcass disposal; Division of Animal Industry oversight |
| CalRecycle | Solid waste, composting rules, and landfill acceptance under Title 14 |
| State and Regional Water Quality Control Boards | Waste discharge requirements, CAFO permits, and groundwater protection under Title 27 |
| County agricultural commissioners and environmental health departments | Local nuisance ordinances, manure management plan submissions, and code enforcement |
The Water Boards’ role is grounded in the Porter-Cologne Act and enforced regionally. Nonpoint source facilities must still comply with animal waste discharge standards found at sections 22560 through 22565 of Title 27 of the California Code of Regulations and with any applicable WDRs or waiver. Meanwhile, CalEPA steps in specifically for emergency mortality events; its guidance, developed and approved by CalEPA and CDFA in 2004 for the management of animal mortalities on farms and ranches under a declared emergency, covers scenarios like disease outbreaks or extreme heat events when normal rendering capacity is exceeded.
At the county level, some jurisdictions require you to file paperwork before you even start managing manure at scale. Santa Clara County, for example, requires certain operations to submit a manure management plan, and state law requires the County of Santa Clara to prevent the discharge of pollutants, including manure and manure-laden runoff to public waterways. If you operate near livestock boundary disputes as well, review cattle trespass laws in California, since fencing and containment failures often trigger both trespass and waste-runoff complaints simultaneously.
Water Setbacks, Groundwater Protections, and Health Standards in California
Water quality protection sits at the center of almost every animal waste rule in the state, and for good reason. Santa Clara County’s watershed program explains that livestock manure contains bacteria, nitrogen, ammonia, and phosphates, and these pollutants can be carried to local waterways by rainwater runoff and affect soil health. Left unmanaged, excess amounts of nutrients, nitrogen, and phosphorous can cause algae blooms, which can reduce the oxygen levels in waterways creating conditions that make it difficult for marine life.
The specific setback numbers matter if you are burying a carcass or siting a manure storage area. CalEPA’s guidance for on-site burial specifies that carcasses should be covered with at least three feet of soil and placed no closer than 100 feet from any well, according to LegalClarity’s summary of the state guidance. That 100-foot buffer exists because shallow groundwater near wells is exactly where decomposing organic matter poses the highest contamination risk.
Key Insight: A 25-year, 24-hour storm event is the design benchmark for manure storage structures statewide. If your containment system can’t handle that level of rainfall without overflowing, you’re already out of compliance before a single drop of runoff reaches a creek.
These water-focused standards are also why the Regional Water Quality Control Boards, not just CalRecycle, stay involved in day-to-day livestock operations. Even facilities that don’t meet the federal CAFO threshold are treated as nonpoint sources and held to the same Title 27 discharge standards referenced earlier, which keeps groundwater and surface water protection consistent across large and small operations alike.
CAFO and Nutrient Management Plan Requirements in California
If your operation meets the federal definition of a Concentrated Animal Feeding Operation, you’re stepping into a much more formal permitting structure. Title 27 defines a confined animal facility broadly: any place where cattle, calves, sheep, swine, horses, mules, goats, fowl, or other domestic animals are corralled, penned, tethered, or otherwise enclosed or held and where feeding is by means other than grazing.
Large CAFOs generally need coverage under an NPDES permit or an appropriate waiver, and the trigger for scrutiny is almost always the Nutrient Management Plan (NMP). Under San Francisco Bay Region water board orders, large CAFOs that discharge stormwater from cropland where manure, litter, or process wastewater has been applied may enroll under this Order if they are implementing a Nutrient Management Plan upon enrollment, but large CAFOs that discharge such stormwater without a Nutrient Management Plan are in violation of the federal Clean Water Act (CWA) and may be fined for the discharge and/or required to enroll under a NPDES permit instead.
Self-reporting is the backbone of how the state tracks compliance, and it isn’t working perfectly. Stanford Law School’s 2026 analysis found that pursuant to the Porter-Cologne Act, the Regional Water Resources Control Boards require CAFs to self-report their manure production and waste management practices in annual reports. The paper’s review of 1,280 annual reports submitted in 2023 and 2024 raised questions about how consistently that self-reporting reflects reality.
That concern is backed up by independent research. A separate 2026 investigation reported that in 2024, 14% of dairy farms that the study analyzed reported producing no wastewater at all, even though those farms had an average herd size of 313 cows. The same reporting noted a practice called “manifesting,” where large factory farms transfer some or all of their manure to farms that aren’t subject to manure disposal regulations, which regional boards are still working to close as a compliance gap.
Important Note: Manure conversion factors used to calculate reportable waste volumes vary significantly by region, and some regions allow farms to set their own factors without independent verification. If your operation is near a threshold for CAFO designation, don’t assume your regional board’s default calculation matches USDA estimates for your herd type.
Penalties for Illegal Dumping, Missed Carcass Deadlines, and Water Violations in California
The financial risk of getting waste disposal wrong in California ranges from modest local fines to serious felony-adjacent misdemeanor exposure, depending on volume and intent. General illegal dumping falls under Penal Code 374.3, and the statute treats commercial quantities far more harshly than small-scale violations. Under the statute, a person who places, deposits, or dumps, or causes to be placed, deposited, or dumped, waste matter in violation of this section in commercial quantities shall be guilty of a misdemeanor punishable by imprisonment in a county jail for not more than six months and by a fine.
If your operation employs more than 10 full-time workers, the fine structure escalates sharply on repeat violations: not less than one thousand dollars ($1,000) nor more than five thousand dollars ($5,000) upon a first conviction, not less than three thousand dollars ($3,000) nor more than ten thousand dollars ($10,000) upon a second conviction, and not less than six thousand dollars ($6,000) nor more than twenty thousand dollars ($20,000) upon a third or subsequent conviction. On top of any fine, courts typically order cleanup as a separate mandatory condition.
Water discharge violations carry their own mandatory penalty floor, regardless of dumping intent. Under California Water Code section 13385(h), a mandatory minimum penalty of $3,000 be assessed by the Regional Board for each serious violation. A serious violation is defined specifically: any waste discharge that exceeds the effluent limitation for a Group I pollutant (priority pollutants) by 40 percent or more, or a Group II pollutant (toxic pollutants) by 20 percent or more. Failing to submit required self-monitoring reports counts too, since California Water Code section 13385.1 also defines a serious violation subject to MMP a failure to submit a compliance self-monitoring report for each complete period of 30 days.
Missed carcass deadlines carry a different kind of risk. Because contagious disease carcasses must be disposed of immediately and can only travel to the nearest crematory, delay isn’t just a paperwork problem, it’s a direct violation of Food and Agricultural Code section 9142 that CDFA can act on quickly. Even outside disease cases, letting a carcass linger long enough to create odor or vector problems puts you back into the same nuisance-based enforcement that governs manure violations. Persistent nuisance complaints of any kind, including those covered under barking dog laws in California, tend to follow the same local code enforcement escalation path: warning, citation, then fine.
How to Confirm Current California Animal-Waste Rules With the Agencies
Because this framework spans state statutes, water board orders, and local ordinances that can change independently of each other, the smartest move before you build a manure storage area or plan a disposal method is to verify directly with the agencies involved. Follow these steps in order:
- Start with your county agricultural commissioner or environmental health department. Local ordinances often set stricter setbacks or reporting requirements than the state minimum.
- Contact your Regional Water Quality Control Board if you keep more than a handful of animals, especially if you’re near a waterway or have any liquid manure handling system.
- Reach out to CDFA’s Division of Animal Industry for any contagious disease disposal question, since that agency prescribes the exact disposal method in those cases.
- Check with your local CalRecycle-designated Local Enforcement Agency before assuming a landfill will accept carcass waste; many will not, especially for large animals.
- Track pending legislation such as the C.A.T.T.L.E. Act (AB-411), which could change composting rules for livestock carcasses if it passes in a future session.
If you run a diversified small farm with poultry alongside larger livestock, it’s also worth reviewing general pet laws in California and wildlife removal laws in California, since mixed-species properties sometimes trigger overlapping animal control and waste rules that a single-species operation wouldn’t face.
Pro Tip: Regional Water Board staff are generally more responsive to a quick phone call or email asking “does my operation need a permit” than to a formal complaint response later. Asking first is almost always cheaper than defending a violation after the fact.
California’s animal waste rules exist to protect groundwater, prevent disease spread, and keep neighbors from dealing with odor and vector problems, not to make compliance impossible. The practical path is straightforward: know which agency covers your specific waste stream, document your removal and disposal practices, and check in with the relevant board or department whenever your operation grows or your waste volume changes. That habit alone puts you ahead of most of the violations this article covers.