Feedlot practices in the United States are regulated by a patchwork of federal agencies, each responsible for a different piece: water pollution, drug use in animals, food safety, disease control, and waste management. No single agency oversees everything that happens on a feedlot. Instead, the EPA, FDA, USDA, and several sub-agencies each enforce their own set of rules, and state governments often layer additional requirements on top.
EPA: Water Pollution and Waste Discharge
The Environmental Protection Agency is the primary federal regulator of feedlot environmental impacts. Under the Clean Water Act, the EPA classifies large feedlots as Concentrated Animal Feeding Operations (CAFOs) and requires them to obtain permits through the National Pollutant Discharge Elimination System (NPDES) before discharging pollutants into waterways. These permits set limits on what can leave the operation, including manure runoff, and require feedlots to develop plans for managing waste so it doesn’t contaminate rivers, streams, or groundwater.
The CAFO rules have been revised multiple times, most notably in 2003, 2008, and 2012. A key legal distinction that emerged from court challenges is that feedlots need permits when they actually discharge pollutants, not merely when they propose to. In practice, this means a feedlot that keeps all waste contained on its property may not need an NPDES permit, but one whose runoff reaches any body of water does.
Air emissions from feedlots sit in a murkier regulatory space. Feedlots produce ammonia and hydrogen sulfide from animal waste, which are classified as hazardous substances. However, a 2019 rule exempted farms from reporting these air emissions under the Emergency Planning and Community Right-to-Know Act (EPCRA). That exemption remains in place, though the EPA has been weighing whether to reinstate reporting requirements. A public comment period on the issue closed in February 2024, and the agency has not yet announced a decision.
FDA: Antibiotics and Medicated Feed
The Food and Drug Administration, through its Center for Veterinary Medicine, regulates what drugs feedlot cattle receive, particularly antibiotics. This has become one of the most active areas of feedlot regulation over the past decade because of growing concerns about antibiotic resistance in humans.
The FDA has taken several major steps to restrict how antibiotics are used in feedlots. It eliminated the use of medically important antibiotics solely for growth promotion, meaning feedlots can no longer add certain antibiotics to feed just to make cattle grow faster. Antibiotics that are important in human medicine now require veterinary oversight. Products that were previously available over the counter have been transitioned to prescription status, so a veterinarian must authorize their use. The FDA has also finalized rules defining how long these drugs can be administered through feed, preventing indefinite low-dose use that accelerates resistance.
USDA: Food Safety and Animal Health
The U.S. Department of Agriculture touches feedlots through two separate sub-agencies, each with a distinct role.
Food Safety and Inspection Service
FSIS is responsible for making sure cattle are fit for slaughter before they enter a processing plant. Federal inspectors examine every animal on the day of slaughter, observing them both at rest and in motion. They look at overall condition, alertness, mobility, breathing, the eyes, legs, and body, checking for unusual swellings or abnormalities. Animals that don’t pass this inspection are pulled from the line.
This process, called ante-mortem inspection, also creates a paper trail that connects back to feedlot practices. Inspectors collect documentation showing the date and time of inspection, the number of animals in each pen, and how many passed. They then verify that the number of animals slaughtered during a shift doesn’t exceed the number that passed inspection. While this oversight technically happens at the slaughter facility, it functions as a check on feedlot conditions because sick or mistreated animals are flagged before they enter the food supply. Inspectors are also required to verify that livestock arriving at the plant are humanely handled.
Animal and Plant Health Inspection Service
APHIS handles disease surveillance and control, which directly affects how feedlot cattle can be bought, sold, and moved between states. The agency runs national programs targeting diseases like bovine tuberculosis and brucellosis. Tuberculosis detection relies heavily on carcass inspection at slaughter facilities, but APHIS also requires testing before cattle move across state lines and during disease investigations. When tuberculosis is found in a herd, the response is aggressive: the entire herd is either depopulated or tested animal by animal, with infected cattle removed. There is no treatment for tuberculosis in livestock.
These disease programs impose real constraints on feedlot operators. Interstate movement restrictions can limit where cattle are sourced, and a positive test result in a herd can shut down operations while testing is completed.
NRCS: Waste Management Planning
The Natural Resources Conservation Service, another USDA branch, doesn’t enforce regulations the way the EPA or FDA does. Instead, it provides technical assistance and sets standards that feedlots must meet to receive federal conservation funding or comply with permit requirements. The centerpiece of this is the Comprehensive Nutrient Management Plan (CNMP), which maps out how a feedlot handles manure from barn to field.
A CNMP is detailed. It must include an inventory of every animal on the operation (type, number, weight, and days spent in confinement), the capacity and condition of manure storage structures, soil test data for fields where manure will be applied, nutrient analysis of the manure itself, and setback distances from sensitive areas. The plan must also run risk assessments for water erosion, wind erosion, nitrogen leaching, phosphorus runoff, and air quality. All of this has to comply with federal, state, tribal, and local laws. For feedlots that need an NPDES permit from the EPA, developing a CNMP is often a practical requirement to demonstrate they have a viable plan for keeping waste out of waterways.
State and Local Oversight
Federal agencies set the floor, but states frequently go further. Many states have their own environmental agencies that administer NPDES permits on the EPA’s behalf, adding state-specific requirements in the process. Some states impose stricter setback distances from homes or waterways, cap the number of animals allowed on a given parcel, or require odor management plans that federal law doesn’t mandate. County zoning boards may also weigh in on where feedlots can be sited and how large they can grow.
The result is that two feedlots of the same size raising the same cattle can face very different regulatory burdens depending on which state they operate in. States like Iowa, Nebraska, and Kansas, where feedlots are most concentrated, each have their own permitting systems with requirements that vary in stringency and enforcement.