Biohazardous waste – also called biohazard waste or biomedical waste – is any biological material that poses a potential infection risk to humans, animals, or the environment. This includes human blood and bodily fluids, pathological waste, sharps, microbiological specimens, and animal waste from research or veterinary facilities.
Proper disposal is not optional. In the United States, biohazard waste is regulated by the EPA under Title 40 CFR, OSHA under 29 CFR 1910.1030 (the Bloodborne Pathogens Standard), and the CDC – and each state adds its own layer of requirements on top of federal rules.
This guide covers everything your facility needs to know: how to identify and categorize biohazard waste, which containers to use, how long you can store it, how it gets treated, and what happens after pickup.
What Qualifies as Biohazardous Waste? (Types, Sources & Examples)
Biohazard waste is short for biohazardous waste and is also known as biomedical waste. Biohazard waste is any biological waste that is potentially infectious. The Hazard Awareness and Management Manual (HAMM) of Environment Health & Safety (EHS) outlines the types of biohazard waste as follows:
- human blood and its components, in liquid or semi-liquid form, dried or not
- human bodily fluids (including semen, vaginal secretions, cerebral spinal fluid, synovial fluid, pleural fluid, pericardial fluid, peritoneal fluid, amniotic fluid, and saliva), in liquid or semi-liquid form, dried or not
- human pathological waste: all human tissues, organs, and body parts
- animal waste: all animal carcasses and body parts
- microbiological waste: laboratory waste containing infectious agents (including discarded specimen cultures, stocks of etiologic agents, discarded live and attenuated viruses, wastes from the production of biologicals and serums, disposable culture dishes, and devices used to transfer, inoculate and mix cultures)
- sharps waste: sharp medical utensils such as scalpels, needles, glass slides, lancets, glass pipettes, broken glass that have been contaminated with potentially infectious material
Further to this list, any medical supplies or other equipment (such as gloves, towels, used bandages and dressings, tubes) that have come into contact with the above mentioned materials and consequently exhibit more than trace elements of these biological materials in them are themselves also classified as biohazard waste.
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According to the World Health Organization, of all waste generated by healthcare activities, 85% is general, non-hazardous waste but the remaining 15% is hazardous and may be infectious, toxic, or radioactive. Biomedical waste is generated by:
- healthcare facilities (hospitals, clinics, nursing homes, physician offices, dentist offices, home health care facilities)
- medical research laboratories / centers (including animal research & testing laboratories and schools & universities)
- mortuary & autopsy centers and funeral homes
- blood banks and collection services
- jails and prisons
- casinos
- veterinarian offices, animal shelters, and animal hospitals
Biohazard waste can also be present at the scene of a violent crime, industrial accident, trauma, or suicide. [i] [ii]
The 5 Categories of Biohazard Waste
Understanding which category your waste falls into determines how it must be packaged, stored, and treated. There are five recognized categories:
1. Liquid Biohazard Waste
Liquid biohazard waste is any liquid from humans or animals with a high risk of spreading disease or infection if mishandled. This includes blood, blood components, bodily fluids, and semi-liquid materials.
Important threshold rule: if the volume of liquid waste is less than 25 milliliters, it can be disposed of as solid waste. If the volume exceeds 25 milliliters, it requires controlled liquid waste disposal procedures.
2. Dry (Solid) Biohazard Waste
Solid biohazard waste is any non-sharp item that has come into contact with human or animal biological material. Examples include:
- Personal protective equipment (gloves, gowns, face shields)
- Petri dishes and culture plates
- Towels, linens, and absorbent materials
- Pipettes and lab consumables
- Waste from viruses, bacteria, and live or inactive vaccines
Solid biohazard waste is placed in a labeled container with an autoclave bag, then shipped to a treatment facility for autoclaving before landfill disposal.
3. Sharps Waste
Any device capable of puncturing skin that has been contaminated with biological material is classified as sharps waste. This includes needles, syringes, scalpels, blades, lancets, microscope slides, and broken glass or tubes.
Sharps must go into rigid, puncture-resistant, tamper-proof sharps containers – never into biohazard bags. Replace sharps containers when they reach the 3/4 full mark. Never overfill.
4. Pathological Waste
Human anatomical specimens are classified as pathological biohazard waste. This includes organs, tissues, and body parts removed during surgery, biopsy, or autopsy – all of which may contain infectious bacteria or agents.
Pathological waste must be double-bagged in biohazard bags to prevent leaks and spills, then placed in a sturdy secondary container. Treatment requires either chemical treatment or incineration – autoclaving alone is not sufficient for pathological waste in most states.
5. Microbiological Waste
Microbiological biohazard waste includes infectious organisms, microorganisms, and biologicals. This category covers:
- Disposable culture dishes and specimen cultures
- Discarded live or attenuated viruses
- Devices used to transfer, inoculate, or mix cultures
- Waste from biologicals, serums, and clinical research involving infectious materials
Autoclaving is the standard treatment method for microbiological waste. Once treated, it is categorized and disposed of based on its physical form (solid, liquid, or sharps).
Biohazardous Waste: Federal Regulations & Compliance Requirements
The lifecycle of the management of biohazard waste is as follows: generation, accumulation, handling, storage, treatment, transport, and disposal. [iii] In the United States, biohazard waste management is regulated by the Environmental Protection Agency (EPA) and the Occupational Safety and Health Administration (OSHA), via Title 40 and Title 29, Subpart H – Hazardous Materials of the Code of Federal Regulations (CFR), respectively. Additionally, the Center for Disease Control (CDC) also provides guidelines for the management of biohazard waste. Finally, each state, university, center, company, facility, or organization has its own standards and practices. Discussed in this blog will be the recommendations, guidelines, and standards of the WHO and the United Nations (UN).
Biohazard Waste Containers: Packaging, Classification & Storage Requirements
The first step in handling biohazard waste is to segregate the various types and place them into suitable containers. This can be done as follows:
- Non-hazardous material or general healthcare waste should be separated from the biohazard waste and can be discarded with the rest of the non-hazardous material.
- If non-hazardous waste is mixed with hazardous waste, then the entire mixture should be considered hazardous and dealt with accordingly.
- Sharps must be placed in puncture-proof, tamper-proof container. Typically, the container is made of metal or a high-density plastic but dense cardboard with plastic lining can also work. Sharps containers must not be overfilled so the general rule is that once these containers are three quarters (3/4) full, they should be removed.
- Infectious waste is placed in leak-proof plastic bags / containers that are suitable for the type of material and that bear the international infectious substance symbol:
- Low-level radioactive infectious waste (swabs, syringes, etc.) can be included with the rest of the infectious waste provided this is meant for incineration during the biohazard waste disposal phase.
- If chemical or pharmaceutical waste is small in quantity, it can be collected along with the infectious waste.
- Highly infectious waste has to be sterilized at high temperatures and under high pressure, a process known as autoclaving, and must be placed in strong containers that can support this process.
- Large quantities of obsolete or expired pharmaceuticals can be returned to pharmacies for disposal. If the pills or drugs have spilled, leaked, or have been contaminated, they should be put into containers separate from other biohazard waste and labelled accordingly.
- Large quantities of chemical waste must be collected in a container that resists reaction with the type of chemical it hosts, labelled accordingly, never mixed with other chemicals, and sent to specialized treatment facilities (if available).
- A high content of heavy metals (like cadmium and mercury) have to be stored separately.
- Aerosol cans may be classified as non-hazardous if they are empty and provided the general healthcare waste is not being sent for incineration.
- Cytotoxic waste, that which has a toxic effect on living cells, must be gathered in strong, leak-proof containers that are clearly labelled as cytotoxic waste. These must also be stored completely separately from other types of biohazard waste.
- Highly radioactive waste must be sealed in a lead box that is labelled and bears the international ionizing radiation symbol:
If the waste is in decay, the type of radionuclide, the date of packaging, and required storage conditions must be included in the labelling.
All containers’ labels should include a clear description of the waste contained therein along with the appropriate internationally recognized symbols, the quantity of the waste (weight or volume), the name of the facility or organization that generated the waste, and the date of the container’s production; and the labels should comply with all regulations of their local districts and all other applicable regulations. Also, as a general rule, waste bags should only be three quarters (3/4) filled. They should be sealed tightly, and never by stapling, suitable for transport to wherever their final destination, considering all environmental aggressors and normal conditions of handling & transport and some contingencies. And if the biomedical waste needs to be transferred within the facility of the waste producer, the vehicles of transport (wheeled trolleys, carts, etc.) need to be cleaned and disinfected before use, be easy to load / unload, and have no sharp edges that could damage the containers or bags that carry the biomedical waste.
All biohazard waste containers should be stored in an area / room / building separate from non-hazardous materials, appropriate for their contents, their quantities, and the frequency of their collection. Unless the waste is stored in a refrigerated room, for a temperate climate, it should not be stored for more than 72 hours in the winter and 48 hours in the summer, and for a warm climate, no more than 48 hours in the cool months and 24 hours in the hot months. Additionally, the storage facility should adhere to the following recommendations:
- The storage area floor should be impermeable, have a good drainage system, and be easy to clean and disinfect.
- A water supply, cleaning equipment, protective clothing, waste bags and containers should be available and easily accessible.
- It should offer easy access to staff and waste-collection vehicles.
- It should be well-guarded to prevent unauthorized access.
- Animals, insects, and birds should not be able to get in.
- It should offer protection from the Sun.
- It should host good lighting and some ventilation.
- And it should not be located near food stores or food preparation areas.
Biohazard Waste Container Types & Color-Coding Guide
Selecting the correct biohazard waste container is a compliance requirement, not a preference. Using the wrong container type can result in OSHA violations, worker injury, or rejected waste pickups. Here is the standard color-coding system used across U.S. healthcare facilities:
| Container Color | Waste Type |
|---|---|
| Red | Infectious and biohazardous waste (blood, OPIM, contaminated materials) |
| Yellow | Chemotherapy and cytotoxic waste |
| Orange | Highly infectious waste requiring autoclaving before disposal |
| Black | Hazardous pharmaceutical waste (controlled substances, bulk chemotherapy) |
| White or Blue | Non-hazardous pharmaceutical waste |
Biohazard Bins vs. Bags vs. Rigid Containers
- Biohazard bins (rigid, reusable): Used for solid infectious waste and general biohazardous material. Must be leak-proof, puncture-resistant, and labeled with the universal biohazard symbol.
- Red biohazard bags: Single-use, for soft infectious waste such as gloves, dressings, and contaminated disposables. Must meet DOT performance standards (UN 3291 marking for transported waste).
- Sharps containers: Rigid, puncture-proof containers for needles, scalpels, lancets, and broken glass. Replace at the 3/4 full mark — never overfill.
- Yellow cytotoxic bins: For chemotherapy drugs and contaminated materials — must be stored completely separate from other biohazard waste streams.
All biohazard waste containers must display the internationally recognized biohazard symbol, include the generating facility’s name and address, and be dated at the time of sealing.
What Happens After Your Biohazard Waste Is Picked Up
Most healthcare staff know how to bag and container their waste correctly – but few know what actually happens once the truck leaves. Here is the complete chain from your facility to final disposal.
Step 1 – Collection from your facility
When your biohazard waste containers are full (or at scheduled pickup), a licensed waste hauler collects them from your designated storage area. The driver inspects that all containers are properly labeled, sealed, and compliant before loading. Any unlabeled or improperly sealed containers will be rejected – this is one of the most common compliance failures at facilities.
Step 2 – Transport to a treatment facility
The waste is loaded into a closed, locked transport vehicle that meets DOT requirements for biohazardous materials (UN 3291 compliant). The vehicle displays the international biohazard symbol and an emergency contact number. A waste manifest – your compliance documentation – is generated at this point and travels with the waste.
Step 3 – Sorting at the treatment facility
At the treatment facility, waste is sorted to identify items that can be recycled after sterilization. In the past, biohazard waste was simply sent to a landfill. Today, the process is far more controlled – waste is sterilized first, then either recycled or sent to a specialized sanitary landfill.
Step 4 – Treatment (autoclaving or incineration)
The treatment method depends on the waste type:
- Soft infectious waste and microbiological waste: autoclaved at 121-134 degrees Celsius under high pressure until all pathogens are eliminated
- Pathological waste and cytotoxic waste: incinerated at 850-1100 degrees Celsius in a modern incinerator with gas-cleaning equipment
- Plastic items: melted down after sterilization, then sent to recycling centers to be made into new products
- Sharps: autoclaved or incinerated depending on contamination type and state requirements
Step 5 – Disposal or recycling
Once treated and rendered non-hazardous, waste is either sent to a regulated sanitary landfill or to a recycling facility (for sterilized plastics). Your waste manifest is completed and returned to you as proof of compliant disposal. Keep these manifests – OSHA and state regulators can request them during inspections.
Collection, Transportation & Disposal of Biohazard Waste: Step-by-Step
Follow these steps to ensure compliant collection and disposal of biohazard waste from your facility:
- Segregate waste by type — infectious, sharps, chemical, cytotoxic, and pathological waste must never be mixed.
- Place each waste type into the appropriate biohazard waste container or biohazard bin as outlined in the container guide above.
- Label all containers with the biohazard symbol, waste type, generating facility name, and date of sealing.
- Store containers in a designated, secure area — no longer than 72 hours in winter or 48 hours in summer (temperate climate).
- Schedule collection with a licensed biohazardous waste disposal company registered with your state’s waste regulation authority.
- Ensure the transport vehicle meets DOT requirements for biohazardous materials transport (UN 3291 compliant).
- Obtain a waste manifest (consignment note) from the point of generation through to final disposal — retain copies for your compliance records.
- Verify that the treatment method used (autoclaving or incineration) meets your state’s specific biohazard waste treatment requirements.
Biohazard waste should never be allowed to accumulate by the producer of the waste without a well-established plan for routine collection. Waste should be collected as frequently as possible. No containers should be picked up unless they are properly and completely labelled. The staff of the facility / organization that generated the biohazard waste should promptly replace containers so their own staff always follow safe practices when dumping the waste. And in addition to proper labelling, all arrangements and preparation for safe and steady transport should be made well in advance – dispatch documents, shortest route, fewest handling changes, reliable carrier, and in the case of exportation / importation, all required legal documents, international standards, and local regulations.
The carrier transporting the biohazard waste should be registered with the waste regulation authority, and the biohazard waste disposal company should also hold a permit for their work. The waste should be accompanied by a consignment note from the point of generation to the place of disposal.
Biohazard waste transport vehicles should be closed and locked. They should be designed to minimize the damage to the container holding the bags / containers of biomedical waste. Empty bags and containers suitable for waste being transported, suitable protective clothing for staff, cleaning equipment, and special kits for dealing with spills / leaks should be available in the vehicle compartments. The carrier organization’s name should be clearly visible on the transport vehicles. The international symbol for biohazardous material and / or radioactive material should be displayed on the vehicle along with an emergency telephone number. And if the transportation of the biomedical waste exceeds recommended storage duration limits, a refrigerated container must be used. [iv]
Biohazard Waste Treatment Methods: Incineration, Autoclaving & Infectious Waste Sterilization
Treatment of biomedical waste is used to reduce or eliminate its hazard to people and the environment. The treatment is performed by biohazard waste disposal companies registered with the regulating authorities of the locale so this is why this process usually doesn’t take place until the very end of the biohazard waste management process. If the treatment and or disposal is not conducted professionally, efficiently, and using modern technology, it can have highly adverse effects on the environment, causing more harm than good. Upon treatment, waste can be transported to a landfill. Treatment is provided to facilitate biohazard waste disposal.
A common method of treatment is called incineration. Incineration is the application of high temperatures to biohazard waste to kill all organic substances (bacteria, viruses, and other pathogens) contained in the waste. Typically, the waste is converted into ash and gas that often needs to be further cleansed before it can be released into the environment. Upon the completion of the process, the biomedical waste is no longer hazardous. This type of treatment is usually conducted in an incineration plant that may even generate electric power from the heat of the incineration.
“Incineration of waste has been widely practiced, but inadequate incineration or the incineration of unsuitable materials results in the release of pollutants into the air and of ash residue. Incinerated materials containing chlorine can generate dioxins and furans, which are human carcinogens and have been associated with a range of adverse health effects. Incineration of heavy metals or materials with high metal content (in particular lead, mercury and cadmium) can lead to the spread of toxic metals in the environment. Only modern incinerators operating at 850-1100 °C and fitted with special gas-cleaning equipment are able to comply with the international emission standards for dioxins and furans.” ii
Another treatment method that can facilitate the biohazard waste disposal process is autoclaving. An autoclave is a strong, highly-pressurized, steam-heated chamber used to sterilize biomedical waste. Autoclaves are also routinely used to sterilize medical supplies. Items such as plastics can be sterilized by autoclaving and completely melted down to ensure they are virtually pathogen-free; they can then be used to make new products.
Yet another method for disinfecting biohazard waste is the use of bleach. Bleaching refers to a process by which certain types of chemicals (often some compound including chlorine) initiate a chemical reaction with the chemicals of the biomedical waste that makes them gain or lose electrons, resulting in a chemical change in the waste, making it non-hazardous.
And finally, alkaline hydrolysis (biocremation and / or resomation) is a funeral home service provided as an alternative to burial or cremation, reducing carbon dioxide and pollutant emissions from the traditional processes.
Biohazardous Disposal Systems: Choosing the Right Setup for Your Facility
Not all biohazardous disposal systems are the same. The right system for your facility depends on your waste volume, waste types, state regulations, and budget. Here is a breakdown of the primary options:
On-Site Treatment Systems
Some larger facilities — hospitals, research institutions, and universities — operate on-site biohazardous disposal systems such as autoclaves or microwave treatment units. On-site systems require:
- State permitting for operating a treatment facility
- Validated autoclave cycles with biological indicator testing (Geobacillus stearothermophilus spore strips)
- Staff training on temperature, pressure, and cycle time specifications
- Regular maintenance logs and inspection records
On-site systems reduce transport costs and provide greater control over the treatment process, but carry significant compliance and operational overhead.
Off-Site Contracted Disposal (Most Common)
The majority of healthcare facilities — clinics, physician offices, dental practices, labs, and veterinary offices — use a contracted biohazard medical waste disposal provider. Under this model:
- A licensed waste hauler collects your packaged biohazard waste on a scheduled or on-call basis
- Waste is transported to a permitted treatment facility for incineration or autoclaving
- You receive a waste manifest for every pickup — this is your compliance documentation
- The provider is responsible for treatment, final disposal, and regulatory reporting
When evaluating a biohazardous medical waste disposal provider, verify their state registration, liability coverage, manifest documentation process, and whether they offer compliant biohazard waste containers as part of the service.
MedPro Disposal provides fully compliant biohazardous waste disposal services for healthcare facilities across the United States. Request a free quote to see how much your facility can save.
Facilities Beyond Hospitals That Generate Biohazard Waste
Many facility managers assume biohazard waste regulations only apply to hospitals and doctor’s offices. That assumption creates compliance risk. Any facility where biological material is present is subject to biohazard waste regulations. This includes:
- Clinics, urgent care centers, and nursing homes
- Dental offices and oral surgery practices
- Veterinary offices, animal shelters, and animal hospitals
- Medical and clinical research laboratories
- Blood banks and collection services
- Mortuary and autopsy centers
- Jails and correctional facilities
- Casinos (first aid stations)
- Gyms and pools (first aid and blood exposure)
- Schools and universities with biology or research programs
If your facility generates any of the waste types described in this guide, you are legally required to dispose of it through a licensed biohazard waste disposal company. Placing biohazard waste in regular trash is a federal and state violation that carries significant fines.
Frequently Asked Questions About Biohazard Waste Disposal
What is considered biohazardous waste?
Biohazardous waste is any biological material that poses a potential infection risk to humans, animals, or the environment. This includes human blood and blood components, bodily fluids, pathological waste (tissues and organs), sharps, microbiological specimens, and animal waste from research or veterinary settings.
What containers are required for biohazard waste disposal?
The container required depends on the waste type. Sharps must go in rigid, puncture-proof sharps containers. Soft infectious waste goes in red biohazard bags meeting UN 3291 DOT standards. Cytotoxic waste requires yellow leak-proof containers. All biohazard waste containers must be labeled with the biohazard symbol, waste type, facility name, and date.
How is infectious waste sterilized before disposal?
The most common method of infectious waste sterilization is autoclaving — a process using high-pressure steam at temperatures between 121°C and 134°C to kill all pathogens. Autoclave effectiveness must be validated with biological indicator tests. Highly infectious or cytotoxic waste may require incineration instead of autoclaving depending on state regulations.
What are the OSHA requirements for biohazard waste disposal?
OSHA regulates biohazard waste under 29 CFR 1910.1030 (the Bloodborne Pathogens Standard). Key requirements include: proper labeling of all biohazard waste containers, use of puncture-resistant sharps containers, a written Exposure Control Plan, employee training, and use of appropriate personal protective equipment during waste handling.
What is the difference between biohazardous waste and medical waste?
Medical waste is a broad term that includes all waste generated by healthcare activities. Biohazardous waste is a specific subset of medical waste that poses an infection risk. Not all medical waste is biohazardous — for example, unused packaging or non-contaminated disposables are medical waste but not biohazardous.
How often should biohazard waste containers be collected?
Biohazard waste should not be stored longer than 72 hours in winter or 48 hours in summer in temperate climates, and no longer than 24-48 hours in warm climates. Sharps containers should be replaced when 3/4 full, regardless of time. Most facilities schedule regular pickups weekly or bi-weekly depending on waste volume.
Can biohazard waste be treated on-site?
Yes, facilities with the appropriate state permits can operate on-site treatment systems such as autoclaves. However, most small to mid-sized healthcare facilities use a licensed off-site biohazardous waste disposal provider. On-site treatment requires validated equipment, staff training, and ongoing compliance documentation.
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References
[i] Hazard Awareness and Management Manual (HAMM): VI. Hazardous Waste Directory: 8.0 Biohazardous Waste. Fred Hutchinson Cancer Research Center. Retrieved from https://extranet.fhcrc.org/EN/sections/ehs/hamm/chap6/section8.html.
[ii] (November 2015). Media Centre: Fact sheets: Health-care waste. World Health Organization. Retrieved from http://www.who.int/mediacentre/factsheets/fs253/en/.
[iii] U.S. Congress, Office of Technology Assessment. (September 1990). Finding the Rx for Managing Medical Wastes. (OTA-O-459). Washington, DC: USGPO.
[iv] Safe management of wastes from health-care activities: 7 – Handling, storage, and transportation of health-care waste. World Health Organization. Retrieved from https://www.google.ae/url?sa=t&rct=j&q=&esrc=s&source=web&cd=15&cad=rja&uact=8&ved=0ahUKEwjg_oWT1tvKAhWJrxoKHd0kCUE4ChAWCDIwBA&url=http%3A%2F%2Fwww.who.int%2Fwater_sanitation_health%2Fmedicalwaste%2F061to076.pdf&usg=AFQjCNFqvxsIpq7qvVJYzIHT0JIYSNFg6A&sig2=MFwZEdakkspA13whv0x3Vg&bvm=bv.113034660,d.ZWU.
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