Livestock Biosecurity Requirements in Washington State Every Producer Should Know

Washington state is home to a diverse and economically significant agricultural sector, and protecting that sector from disease starts long before an outbreak occurs. Biosecurity is the first line of defense for every livestock operation in the state — whether you raise cattle, swine, poultry, sheep, or goats.

If you manage a farm or ranch in Washington, understanding what the Washington State Department of Agriculture (WSDA) requires and recommends is not optional. Failing to follow these rules can expose your animals, your neighbors’ herds, and the state’s broader agricultural economy to serious risk. This guide walks you through each major area of livestock biosecurity compliance in Washington so you know exactly what is expected of you.

What Is Livestock Biosecurity and Why It Matters in Washington

The best way to keep your animals healthy is by taking measures to keep disease away in the first place — that is the practice of biosecurity. At its core, biosecurity is a system of management practices designed to prevent the introduction and spread of disease-causing agents on your premises.

Disease-causing agents can be brought onto a premises by human activity, fly and tick vectors, new animals, shared equipment, flooding, birds, vermin, and many other means. Some of these diseases are zoonotic, meaning they are transmissible between people and animals. This makes biosecurity not just an animal welfare issue, but a public health concern as well.

Washington’s agricultural landscape — spanning eastern grain and cattle country to western dairy and poultry operations — creates a wide variety of exposure risks. The WSDA, operating under Title 16 RCW and the Washington Administrative Code (WAC), provides both mandatory requirements and strong guidance to help producers manage those risks. By state law, certain animal diseases must be reported to the State Veterinarian’s Office, and the full list is identified in WAC 16-70-020 of the state’s Administrative Code.

Premises Registration and Identification Requirements in Washington

Knowing where animals are located is foundational to disease traceability and emergency response. Washington participates in the federal Animal Disease Traceability (ADT) framework, which requires livestock premises to be registered and animals to carry approved identification.

Producers can learn more about Animal ID Tags, how to order RFID tags, and register for a federal Premises Identification Number (PIN) through the WSDA. A Premises Identification Number is a unique seven-character alphanumeric code assigned to a specific geographic location where livestock are raised, and it is the cornerstone of the national animal traceability system.

Washington’s livestock identification statutes are codified under Chapter 16.57 RCW (Identification of livestock) and Chapter 16.58 RCW (Identification of cattle through licensing of certified feed lots). These chapters establish the legal framework for how animals must be identified when they change ownership or move through commerce.

• Cattle and bison moving interstate or through commerce generally require official eartags or other USDA-approved identification.
• Entry permits are required for all out-of-state cattle, swine, and rams over six months old. To obtain a permit number, call 360-902-1878 between 8 AM and 5 PM Monday through Friday.
• The Animal Services Division Compliance Program provides law enforcement in support of the Animal Health, Avian Health, Animal Disease Traceability, and Livestock Identification programs.

If you raise cattle, you should also be aware of Washington’s brand inspection system, which works alongside premises registration to verify ownership and movement. You can learn more about brand inspection requirements in Washington to ensure your cattle identification practices are fully compliant.

Biosecurity Plan Requirements in Washington

While Washington does not universally mandate a written biosecurity plan for all livestock operations, WSDA strongly encourages every producer to develop and maintain one — and certain sectors, particularly dairy and poultry, face heightened expectations tied to program participation and disease response protocols.

Once a foreign animal disease such as Foot-and-Mouth Disease is diagnosed, WSDA places the responsibility of implementing good biosecurity practices on the producers and owners of a premises. At a minimum, WSDA recommends premises utilize existing enhanced biosecurity outbreak guidance available in the NAHEMS Guidelines for Biosecurity and those outlined in the Secure Pork Supply, Secure Beef Supply, Secure Milk Supply, and Secure Sheep and Wool Supply plans.

For poultry operations seeking National Poultry Improvement Plan (NPIP) certification, a formal biosecurity assessment is required. To become NPIP certified, a WSDA veterinarian will perform a site inspection of your premises and your flock, including an assessment of the biosecurity and sanitation of your premises, including poultry houses, outdoor runs, brooder houses, hatching rooms, and egg handling rooms.

For dairy operations, WSDA and the Washington Animal Disease Diagnostic Laboratory (WADDL) have published detailed biosecurity plan templates. Resources include a Biosecurity Checklist for Dairy Operations, a Biosecurity Info Manual for Dairy Operations, Biosecurity Performance Standards for unpasteurized milk collection and transport, and a Biosecurity Plan Template.

Regardless of whether a written plan is formally required for your operation, a well-documented biosecurity plan protects you legally, operationally, and financially. Your plan should address animal sourcing, isolation protocols, visitor controls, sanitation schedules, and disease reporting procedures. Producers in neighboring states can review how similar frameworks are structured — for example, livestock disease reporting requirements in Colorado and livestock disease reporting requirements in California offer useful points of comparison.

Animal Isolation and Movement Control Requirements in Washington

Controlling when, where, and how animals move on and off your property is one of the most effective biosecurity tools available. Washington’s rules and guidance on animal isolation and movement are detailed and species-specific.

Sourcing and Incoming Animal Protocols

Essential practices to control the introduction and spread of diseases include obtaining animals from reputable sources, avoiding purchasing animals from a livestock auction or online classified advertising if you plan to breed them, and conducting species-specific pre-purchase laboratory testing and examination.

If you add or replace an animal, be sure it is from a reputable dealer and purchased in the United States, Canada, or another country approved by the USDA. Get a health certificate for all animals entering your premises. Isolate new stock for two weeks for observation.

Species-Specific Isolation Guidelines

Isolation periods vary by species and circumstance. Isolate horses upon return from a show or recently purchased horses for 21 days. Take horses’ temperatures twice a day after commingling or events. Call your veterinarian immediately if you observe unusual disease symptoms in livestock.

For cattle and swine, particularly in a dairy context, dedicate caretakers and equipment to newly arrived animals or work with them last. Clothing, footwear, and equipment worn or used around these animals should not be worn or used around other animals until cleaned and disinfected.

Sick Animal Protocols

Use separate equipment for healthy and sick animals. Prevent contact between healthy animals and those suffering from illness. Feed, water, and treat healthy animals before working with sick animals.

Washington also enforces import and movement permit requirements for interstate movement. An Electronic Entry Permit system exists for shipments of cattle and swine, and Electronic Certificates of Veterinary Inspection (CVIs) are required for many movements. For producers who regularly move animals across state lines, reviewing livestock trailer requirements in Nevada, Wisconsin, and Pennsylvania can help ensure compliance across multiple jurisdictions.

Visitor, Vehicle, and Equipment Sanitation Rules in Washington

People, vehicles, and equipment are among the most common vectors for disease introduction onto a farm. WSDA provides specific guidance on how to manage each of these entry points.

Visitor Management

Limit nonessential traffic on the farm. Post a sign at the entrance instructing visitors to check in at a central location, such as the farm house. Have one combined entrance and exit. If no one is available to monitor visitors, develop a system for them to sign in so that all visits can be monitored. Display the telephone number at the entrance so individuals can call and make appointments to see the owner or manager.

Know who is on your farm or ranch at all times. Keep a record of all deliveries and visitors. If a highly infectious animal disease occurs on your farm, this information will help with follow-up investigations.

Limit access of nonessential people. Unauthorized visitors should not be allowed to come in contact with farm animals. If your livestock business depends on visitors, such as petting farms, ensure that visitors have not been in countries where diseases such as foot-and-mouth disease have recently occurred.

Vehicle and Equipment Sanitation

Instruct drivers of essential vehicles, such as feed or milk trucks, to drive only where they need to go. Require livestock and feed haulers to clean and disinfect their vehicles before hauling livestock or feed to or from your operation.

For trailers specifically, limit the use of trailers to your own cattle. Clean and disinfect trailer interiors that were used to haul cattle from other operations with unknown health status.

Clean and disinfect animal handling facilities and equipment on a regular schedule and after any contact with outside animals or equipment. Use an EPA-registered disinfectant effective against the pathogens relevant to your species and region.

Employee and Family Member Protocols

Develop and enforce a policy for family members and employees who visit other livestock facilities. Workers who have contact with other herds are a significant but often overlooked disease vector.

For operations dealing with potential zoonotic diseases, precautions for people working with livestock include wearing gloves and avoiding touching eyes, nose, and mouth when working with sick animals, and washing hands with soap and water (preferred) or alcohol-based hand rub after contacting sick animals or their areas and before eating, drinking, or smoking.

Wildlife and Pest Control Obligations in Washington

Wildlife and pests represent a persistent and often underestimated biosecurity threat. Washington’s diverse landscape — with large populations of deer, elk, rodents, and wild birds — creates significant exposure risks for livestock producers.

Wildlife Exclusion

Keep dogs, cats, and other animals confined to the farm. Do not feed or encourage wildlife to come onto your farm. Deer and elk are susceptible to foot-and-mouth disease and are difficult to control if your farm or an adjacent farm should become infected.

Dogs, cats, and horses can serve as mechanical carriers of disease, meaning they can transport pathogens on their bodies without becoming ill themselves. This is why confining your own animals and discouraging wildlife contact is equally important.

For producers using livestock guardian animals as part of their wildlife management strategy, understanding their proper role within a biosecurity framework is essential. You can find helpful background in this overview of facts about livestock guardian dogs to better integrate them into your operation.

Rodent, Insect, and Bird Control

Control rodents and insects. Work with a reputable pest control company to establish and maintain an effective pest control program.

Keep insects, rodents, and birds out of feed storage. They can carry diseases and may serve as a reservoir of infection. This is particularly critical in Washington given the elevated risk of Highly Pathogenic Avian Influenza (HPAI), which wild birds can introduce to both poultry and cattle operations.

Feed Safety and Wildlife Interaction

Keep livestock away from raw household waste, bones, or swill. Food waste used as livestock feed is required to be fully cooked before feeding to swine. This is a statutory requirement under Washington law, not simply a recommendation.

Be careful where you buy feed and equipment. Buy only from reputable dealers. Buy only feed produced in the United States and used equipment that was not shipped from other countries.

Dead Animal Disposal Requirements in Washington

Proper carcass disposal is both a legal requirement and a critical biosecurity practice. Washington regulates dead animal disposal through multiple agencies, and the rules differ depending on the cause of death.

Regulatory Framework

Managing livestock deaths requires environmentally sound methods of disposal. There are several options approved by the Washington State Department of Agriculture (WSDA), the Washington State Department of Ecology, and the Washington State Department of Health.

WSDA has authority to regulate disposal of livestock that have died of disease or an unknown cause. The Department of Health regulates disposal of other animal mortalities. Ecology regulates solid waste management, including composting.

Timing Requirements

Within 72 hours after death or discovery, the owner of a dead animal — or, if the owner cannot be identified, the owner of the property on which the animal is found — must properly dispose of the dead animal. A dead animal must be covered or otherwise removed from public view immediately upon discovery.

Approved Disposal Methods

The person responsible for disposal of a dead animal must dispose of it by burial, landfilling, incineration, composting, rendering, or another method approved by the local health officer (such as natural decomposition) that is not otherwise prohibited by federal, state, or local law or regulation.

The goal of proper carcass disposal is to prevent livestock disease from spreading, protect public health, and safeguard the economic viability of the state’s livestock industry.

Burial Rules

A person disposing of a dead animal by burial must place it so that every part is covered by at least three feet of soil; at a location not less than 100 feet from any well, spring, stream, or other surface waters; not in a low-lying area subject to seasonal flooding or within a 100-year flood plain; and not in a manner likely to contaminate groundwater.

A person disposing of a dead animal must not bury or compost it within the sanitary control area of a public drinking water supply source as designated under chapter 246-290 WAC (Public water supplies) or chapter 246-291 WAC (Group B public water systems).

Composting Guidelines

Temperatures inside a compost pile should be between 110°F and 158°F to indicate active aerobic composting. Maintaining internal pile temperatures above 131°F for three days or more helps reduce pathogens.

Proper and legal dead animal disposal methods may include burial, incineration, composting, or landfill disposal, depending on local regulations. Always verify with your county that your chosen method complies with local ordinances, as requirements can vary across Washington’s 39 counties.

Reporting Unusual Mortality

Report any unusual illnesses or deaths to your veterinarian or the State Veterinarian’s Office at [email protected] or 360-902-1878. Early reporting is one of the most powerful tools for preventing a localized disease event from becoming a regional emergency.

Producers in other states can see how comparable disease reporting obligations are structured by reviewing livestock disease reporting in Florida, Illinois, and other states to understand how Washington’s approach compares regionally.

Staying Compliant With Washington’s Livestock Biosecurity Standards

Livestock biosecurity in Washington is a multi-layered obligation that touches every aspect of your operation — from the moment a new animal arrives on your property to how you manage a mortality event. The Animal Services Compliance Program supports the division by conducting comprehensive investigations and law enforcement for violations under its jurisdiction, along with proactive efforts and field enforcement to ensure compliance with state animal health and livestock laws and regulations.

The most effective approach is to treat biosecurity not as a regulatory checklist but as an integrated management philosophy. Minimize stress for your animals by providing a clean environment, plentiful high-quality food, fresh air, clean water, and enough space for all animals — these foundational practices support immune function and reduce vulnerability to disease introduction.

If you keep horses on your operation, staying current on vaccination requirements is another layer of protection. Review the rabies vaccine requirements in Washington to ensure your equine biosecurity protocols are fully aligned with state law. And if you operate across multiple states or transport animals regularly, familiarizing yourself with the livestock trailer standards in neighboring states — including Nevada — will help you maintain seamless compliance on the road.

For the most current guidance and regulatory updates, contact the WSDA Animal Health Program directly at 360-902-1878 or email [email protected]. Staying proactive, informed, and connected with your state veterinarian is the most reliable path to keeping your herd — and Washington’s agricultural economy — healthy and protected.