The Three Bloodborne Pathogens Most Often Named

Cal/OSHA does not work from a closed list, but three viruses drive day-to-day compliance work:

• HIV (Human Immunodeficiency Virus). Transmitted through blood and certain other body fluids. Causes AIDS.
• Hepatitis B Virus (HBV). A liver virus that can remain viable on environmental surfaces for at least seven days. HBV is a major occupational concern, which is why the standard includes a specific no-cost Hepatitis B vaccination requirement for covered employees.
• Hepatitis C Virus (HCV). A liver virus transmitted primarily through blood-to-blood contact. No vaccine, so the standard relies on engineering controls and post-exposure follow-up.

Other pathogens carried in blood, including West Nile, syphilis, malaria, and viral hemorrhagic fevers, fall under the standard’s general definition. Compliance programs in California facilities, though, are built around HIV, HBV, and HCV because those are the realistic occupational risks.

What Counts as “Blood or OPIM”

The standard does not stop at the word “blood.” It also covers Other Potentially Infectious Materials (OPIM), the broader category that catches most workplace exposure scenarios. Knowing the difference is the first thing that separates a facility with a real exposure determination from one with a paper template.

Two things to notice. First, “visible blood” is the operative phrase. If blood is visible in a fluid, that fluid is OPIM under §5193, whatever fluid it started as. Second, the “cannot be identified” clause covers nearly every first-aid scenario. A custodian or first-aid responder confronting a workplace injury does not stop to sort one fluid from another. The standard assumes universal precautions because that assumption matches what actually happens.

Where the Cal/OSHA Standard Lives

In California, bloodborne pathogen exposure is regulated under Title 8 of the California Code of Regulations, section 5193. The federal counterpart is 29 CFR 1910.1030. In places, California’s version is more specific than the federal rule. California is the version Cal/OSHA enforces.

A few orientation points:

• Regulator: Cal/OSHA. Not CUPA (your local CUPA, which may be a county environmental health department, fire department, or another local agency depending on jurisdiction, handles hazardous materials reporting and does not inspect for §5193). Not CDPH.
• Trigger: “Occupational exposure,” defined as reasonably anticipated contact with blood or OPIM in the course of an employee’s duties. The standard applies based on exposure, not facility type.
• Core obligations: A written Exposure Control Plan, a documented exposure determination, methods of compliance (engineering controls, PPE, work practices), Hepatitis B vaccination offered at no cost to covered employees, post-exposure evaluation and follow-up, annual training, and recordkeeping.

The depth on each of those lives on our bloodborne pathogen exposure control plan pillar. This page sticks to the underlying definitions.

Employer Scenarios That Catch People by Surprise

When we walk a California facility for the first time, the most common reaction to the bloodborne pathogen question is “we are not a healthcare facility, so this does not apply.” That answer is wrong more often than it is right. The patterns that bring §5193 into play at non-clinical sites:

• A manufacturer with a designated first-aid responder team. The designation, on paper, is what creates the exposure category.
• A food-distribution warehouse where sharp equipment and frequent minor injuries mean the cleanup team will, predictably, encounter blood.
• A property manager or commercial landlord whose custodial crew cleans restrooms, locker rooms, or production areas that can contain blood or sharps.
• A research or QC laboratory working with unfixed tissue or human blood samples.
• A school district, municipal water utility, or other public agency whose RFPs name “Bloodborne Pathogen and Exposure Control Plan” as a required line item for vendors and contractors.

If any of those describe your facility and you cannot produce a current written ECP, a documented exposure determination, a Hep B vaccination offer record, and current training records, that is the kind of gap Cal/OSHA writes up.

What to Do If Any of This Applies

If §5193 applies, the work is not exotic. The order we recommend:

That is the working shape of a bloodborne pathogen compliance program. The hard part is not the rule. It is recognizing the exposure category at facilities that do not look like healthcare facilities. If you are getting acquainted with another narrow California program that often catches industrial sites the same way, our radiation safety program guide is the parallel for cabinet x-ray and XRF operators.