Biological Hazards: Hazard Analysis & Controls
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Biological hazards in the workplace encompass exposure to bacteria, viruses, fungi, parasites, and other living organisms or their byproducts that can cause infection, allergic reaction, or toxic effects in workers. These hazards range from bloodborne pathogens like HIV and Hepatitis B transmitted through needlestick injuries to airborne pathogens like tuberculosis spread through respiratory droplets, to environmental organisms like Legionella in building water systems and mold in water-damaged structures.
The scope and severity of biological hazards became unmistakable during the COVID-19 pandemic, which killed over 1 million Americans and fundamentally reshaped occupational health thinking about airborne disease transmission. But biological hazards were a leading cause of occupational illness long before 2020. The Bureau of Labor Statistics reported approximately 36,000 nonfatal occupational illnesses due to exposure to harmful substances or environments in 2022, with a substantial portion attributed to biological agents. Healthcare workers alone sustain an estimated 385,000 needlestick and other sharps-related injuries per year according to CDC data.
OSHA's Bloodborne Pathogens standard (29 CFR 1910.1030) is one of the most widely applicable biological hazard regulations, covering any employee with reasonably anticipated occupational exposure to blood or other potentially infectious materials. Beyond this standard, biological hazards are addressed through respiratory protection requirements, sanitation standards, and the General Duty Clause. A thorough JSA for biologically hazardous work identifies the specific organisms of concern, routes of exposure, and layered controls that break the chain of transmission from source to worker.
Disclaimer
This content is provided for general informational and educational purposes only. It is not a substitute for a site-specific Job Safety Analysis conducted by a qualified safety professional familiar with your workplace conditions, equipment, and personnel. OSHA citations, BLS statistics, and hazard controls referenced here may not reflect the most current standards or apply to your specific situation. Always consult current OSHA regulations, manufacturer guidelines, and a competent person before beginning work. Health & Safety Systems LLC assumes no liability for actions taken based on this content.
Incident Statistics
~340
Fatalities (2022)
36,000
Nonfatal Injuries (2022)
385,000
Needlestick injuries per year among healthcare workers (CDC)
Biological exposure incidents are widely underreported. CDC estimates that only about half of needlestick injuries are formally reported, and many infectious disease cases are never attributed to occupational exposure.
Source: Bureau of Labor Statistics, Census of Fatal Occupational Injuries (CFOI) and Survey of Occupational Injuries and Illnesses (SOII), 2022
Document Biological Hazards: Hazard Analysis & Controls Controls in Your JSA
Use JSABuilder to identify hazards, assign controls, and share safety plans with your team.
Start Free TrialHierarchy of Controls
The hierarchy of controls ranks protective measures from most to least effective. Apply controls from the top of the hierarchy first.
Elimination
Remove the biological hazard source entirely from the work environment when possible.
- Eliminate unnecessary blood draws by consolidating lab orders and using non-invasive monitoring where clinically appropriate
- Remove standing water and fix moisture intrusion to prevent mold growth at the source
- Eliminate manual waste sorting by using automated systems for processing medical or biological waste
Substitution
Replace high-risk materials, procedures, or equipment with alternatives that reduce biological exposure potential.
- Replace conventional needles and sharps with safety-engineered sharps devices (self-sheathing needles, needleless IV connectors)
- Substitute manual cleaning of biohazard spills with enzymatic decontamination agents that reduce splashing
- Use closed-system drug transfer devices for handling hazardous drugs that may have biological effects
Engineering Controls
Isolate workers from biological hazards through physical barriers, ventilation, and containment systems.
- Install biological safety cabinets (Class II or III) for laboratory manipulation of infectious agents
- Use airborne infection isolation rooms (AIIR) with negative pressure and 12+ air changes per hour for patients with suspected airborne diseases
- Provide sharps disposal containers within arm's reach at every point of use where needles or scalpels are handled
- Install splash guards, screens, and containment barriers during procedures that generate aerosols or splashes
Administrative Controls
Establish exposure control plans, training, vaccination programs, and work practices that reduce the likelihood of biological exposure.
- Develop and annually update a written Exposure Control Plan as required by 29 CFR 1910.1030
- Implement Universal Precautions: treat all blood and body fluids as potentially infectious regardless of perceived patient status
- Offer Hepatitis B vaccination series at no cost to all workers with occupational exposure, as required within 10 working days of assignment
- Establish post-exposure evaluation and follow-up procedures including incident reporting, medical evaluation, and prophylaxis protocols
PPE
Provide appropriate barriers between workers and biological agents based on the anticipated route and severity of exposure.
- Nitrile or latex examination gloves for all tasks involving potential contact with blood or body fluids
- N95 or higher respirators for airborne pathogen exposure (fit-tested per 29 CFR 1910.134)
- Face shields and safety goggles to prevent mucous membrane exposure from splashes and sprays
- Fluid-resistant gowns or coveralls for tasks involving large-volume fluid exposure or high-splash procedures
Applicable OSHA Standards
Federal OSHA standards that address this hazard type, with enforcement data where available.
29 CFR 1910.1030 — Bloodborne Pathogens
2,467 citations (FY 2024)
Requires employers to protect workers from exposure to blood and other potentially infectious materials through an Exposure Control Plan, engineering and work practice controls, PPE, Hepatitis B vaccination, training, and recordkeeping.
29 CFR 1910.134 — Respiratory Protection
2,811 citations (FY 2024)
Requires a comprehensive respiratory protection program including medical evaluation, fit testing, and training when respirators are used to protect against biological aerosols, airborne pathogens, and other biohazard exposures.
29 CFR 1910.141 — Sanitation
436 citations (FY 2024)
Addresses workplace sanitation requirements including toilet facilities, washing facilities, and drinking water standards that relate to preventing biological contamination and disease transmission.
29 CFR 1910.1020 — Access to Employee Exposure and Medical Records
186 citations (FY 2024)
Requires employers to maintain and provide employee access to records of biological exposure monitoring, medical surveillance, and exposure incidents for the duration of employment plus 30 years.
Industries Most Affected
Healthcare
Hospitals, clinics, dental offices, and long-term care facilities expose workers to bloodborne pathogens, airborne infections, and drug-resistant organisms. Healthcare has the highest needlestick injury rate of any sector.
Laboratories
Clinical, research, and diagnostic laboratories handle concentrated biological specimens, cell cultures, and infectious agents. Biosafety level designations (BSL-1 through BSL-4) dictate containment requirements.
Wastewater Treatment
Workers are exposed to raw sewage containing bacteria (E. coli, Salmonella), viruses (Hepatitis A, norovirus), and parasites. Aerosolization during treatment processes increases inhalation risk.
Agriculture
Farm workers face zoonotic diseases from animal contact (brucellosis, leptospirosis, avian influenza), fungal spores from hay and grain (histoplasmosis), and insect-borne illnesses from outdoor work.
Veterinary Services
Veterinarians and technicians handle animals carrying zoonotic pathogens, administer biological specimens, and are exposed to bites, scratches, and animal waste that can transmit infection.
Required Personal Protective Equipment
Frequently Asked Questions
What does Universal Precautions mean in workplace safety?
Universal Precautions is an infection control approach defined by CDC and adopted by OSHA that treats all human blood and certain body fluids as if they are known to be infectious for HIV, Hepatitis B, and other bloodborne pathogens. This means workers must use appropriate PPE and follow safe work practices during any contact with blood or potentially infectious materials, regardless of the perceived infection status of the source individual. Universal Precautions does not apply to feces, nasal secretions, sputum, sweat, tears, urine, or vomit unless they contain visible blood.
Is the Hepatitis B vaccine really required for all exposed workers?
OSHA requires employers to offer the Hepatitis B vaccination series at no cost to all employees with reasonably anticipated occupational exposure to blood or other potentially infectious materials. The vaccination must be offered within 10 working days of initial assignment. Employees may decline, but must sign a specific declination statement provided in Appendix A of the Bloodborne Pathogens standard. Employers cannot require employees to pay for or obtain the vaccine elsewhere.
What should happen immediately after a needlestick injury?
The worker should wash the wound immediately with soap and water (for mucous membrane exposure, flush with water for 15 minutes). Report the incident to the supervisor. Seek immediate medical evaluation. The employer must document the exposure incident and provide a confidential post-exposure evaluation including identification of the source individual (if possible), testing of the source individual with consent, testing of the exposed worker, and post-exposure prophylaxis as recommended by current CDC guidelines. All medical evaluations must be provided at no cost to the employee.
How often must the Exposure Control Plan be updated?
The OSHA Bloodborne Pathogens standard requires annual review and update of the Exposure Control Plan. The review must reflect changes in tasks, procedures, and positions that affect occupational exposure, and must document consideration and implementation of appropriate commercially available safer medical devices designed to eliminate or minimize occupational exposure. The employer must solicit input from non-managerial employees responsible for direct patient care in identifying, evaluating, and selecting effective engineering and work practice controls.
What biological hazards exist outside of healthcare settings?
Biological hazards are common in many non-healthcare settings. Wastewater treatment workers face bacteria and viruses in raw sewage. Construction workers encounter mold, bird droppings (histoplasmosis), and rodent waste (hantavirus) during demolition and renovation. Agricultural workers handle animals with zoonotic diseases and work near fungal spore sources. Janitorial workers clean restrooms and handle waste containing biological contaminants. Laboratory workers process biological specimens. Even office workers can be exposed to Legionella from poorly maintained building water systems or mold from water-damaged HVAC systems.