First Aid at Work: What OSHA Actually Requires and Where Small Businesses Fall Short

Walk through a hundred small businesses and you'll find a hundred different approaches to workplace first aid. Some have a fully stocked cabinet in the break room with an AED mounted on the wall and two employees trained in CPR. Others have a box of Band-Aids in a desk drawer that nobody's opened since 2018. Most fall somewhere in between — and most are doing less than OSHA requires, often without realizing it.

First aid compliance tends to get treated as background noise. It doesn't generate the enforcement activity that fall protection or lockout/tagout does, it doesn't come up in industry-specific regulations the way confined space entry or hazard communication does, and it feels like something every reasonable employer already handles. But "reasonable" and "compliant" are different standards, and the gap between them is wider than most small business owners expect.

The OSHA Standard That Governs First Aid

The primary regulation is 29 CFR 1910.151, titled "Medical services and first aid." It's a short standard — just three paragraphs — but it has teeth. The core requirements are these: employers must ensure the ready availability of medical personnel for advice and consultation on matters of plant health; in the absence of an infirmary, clinic, or hospital near the worksite, a person or persons must be trained to render first aid; and first aid supplies approved by the consulting physician must be readily available.

For construction, the parallel standard is 29 CFR 1926.50, which contains similar requirements but also specifies that a first aid kit must be available for every 25 workers, that contents must be checked before being taken on any job, and that the employer must ensure that the nearest hospital, clinic, or ambulance is known in advance.

What these standards share is a performance-based approach. OSHA doesn't hand you a checklist and say "stock these exact items." Instead, it sets an outcome: injured workers need to be able to receive first aid quickly, from someone trained to provide it, with supplies adequate for the workplace hazards. What "adequate" looks like depends on your industry, your workforce size, your hazards, and your distance from professional medical care.

The "Near Proximity" Problem That Catches Employers Off Guard

One of the most misunderstood elements of 1910.151 is the proximity requirement. The standard says that if a hospital, clinic, or infirmary is not "near" the worksite, you must have someone trained in first aid on-site. OSHA has interpreted "near" to mean within three to four minutes of travel time in most circumstances. That's the time window research has established for preventing death from severe bleeding or cardiac arrest — not the ten-minute ambulance response time your county might advertise.

If you're in a suburban industrial park where the nearest urgent care is six miles away through traffic lights, you almost certainly don't have near access. If your crew works in rural areas, on remote job sites, or in buildings where elevator access slows emergency response, the same is true. The practical question is this: if someone collapsed right now, how long before a trained first responder with an AED reaches them? If the honest answer is more than three to four minutes, you need trained first aiders on-site.

This matters most for cardiac arrest, where survival rates drop roughly 10 percent for every minute without defibrillation. A worker who collapses in a warehouse at 7:30 AM and waits eight minutes for EMS has a dramatically different prognosis than one who receives CPR and AED use within the first two minutes. Trained first aiders bridge that gap. They're not a substitute for EMS — they're the reason EMS has someone to work with when they arrive.

What "Trained in First Aid" Actually Means

OSHA doesn't specify a training provider or curriculum, but its compliance guidance has consistently pointed to courses that meet ANSI/ASHI Z308.1, the American Heart Association's guidelines, or similar standards. A credible first aid certification from the Red Cross, American Heart Association, or NSC typically covers CPR and AED use, wound care and bleeding control, response to choking, recognition of stroke and heart attack, and management of fractures, burns, and poisoning. Certifications are generally valid for two years before requiring renewal.

The critical phrase in the OSHA standard is "adequate first aid training." Watching a YouTube video doesn't qualify. Knowing where the first aid kit is kept doesn't qualify. A worker needs hands-on training with demonstrated competency, from a recognized program, with documentation you can produce during an inspection.

How many trained first aiders do you need? OSHA hasn't set a specific ratio for general industry, but the practical answer depends on how many shifts you run, how large your facility is, and how hazardous your work is. A common benchmark used by safety professionals is at least one trained first aider per 50 workers per shift. In higher-hazard environments — manufacturing, construction, chemical handling — a ratio of one per 25 to 30 workers is more appropriate. The goal is ensuring a trained person is always accessible during working hours, including on second and third shifts, not just when the safety manager is in the building.

First Aid Kits: What Needs to Be In There

OSHA's reference to first aid supplies "approved by the consulting physician" sounds more elaborate than it usually is in practice. For most workplaces, compliance means having a kit stocked according to ANSI/ISEA Z308.1, the American National Standard for Workplace First Aid Kits. This standard was significantly updated in 2015 and again in 2021, and it establishes two classes of kits based on the number of workers served and the nature of hazards.

A Class A kit is designed for low-hazard workplaces and covers the most common workplace injuries — cuts, abrasions, minor burns, eye irritation. A Class B kit is intended for higher-hazard environments and includes additional items like tourniquet-grade bandages, splints, and burn dressings. Most manufacturing, construction, and warehouse environments should be using Class B kits. An office environment might legitimately be served by a Class A kit, though some employers choose Class B regardless.

Beyond the classification, the key requirements are that kits must be inspected regularly (at least annually, and before each use in construction), that expired or depleted items must be replaced, that kits must be located where they're actually accessible — not locked in a manager's office, not in a cabinet that requires a key to open during an emergency — and that workers know where they are. The location of first aid supplies should be part of new employee orientation, posted on emergency information boards, and covered in safety training.

Workplace-specific hazards may require supplementing your standard kit. If you work with acids or strong bases, eyewash stations and neutralizing agents belong in your protocol. Chemical burns and eye splashes have specific treatment requirements that a generic kit doesn't address. If your workers use cutting tools, tourniquets should be immediately accessible — and workers should know how to use them. If employees spend time in extreme heat, oral rehydration supplies and cooling protocols matter. The standard kit is the floor, not the ceiling.

AEDs: The Gap Between What's Required and What's Smart

OSHA's general industry standards don't explicitly require automated external defibrillators (AEDs) in most workplaces. State laws vary, and some states do require them in certain settings — New York, for instance, requires AEDs in health clubs and schools. For most general industry employers, AEDs are not legally mandated by federal OSHA.

That said, OSHA's general duty clause requires employers to protect workers from recognized hazards that are likely to cause serious injury or death. Cardiac events are the leading cause of workplace fatalities. Sudden cardiac arrest is survivable with rapid defibrillation. If your workplace has more than a handful of employees and you don't have an AED, a plaintiff's attorney in a wrongful death case — or an OSHA inspector citing a general duty clause violation — has a straightforward argument to make. The cost of an AED has dropped to the $1,200–$1,800 range for a quality unit. The math on risk and cost is not complicated.

If you do have an AED, the program doesn't end at purchase. Units need to be registered with your local EMS system so dispatchers know they're there. Battery and pad expiration dates need to be tracked and maintained. Workers in the area need to be trained on the device — training that's typically integrated into CPR courses. The AED should be mounted visibly, in an unlocked location, with clear signage, and close enough to where workers actually are that someone can retrieve it in under two minutes.

The Response Plan Nobody Has Written Down

Having a trained first aider and a stocked kit is the hardware. The software is a written emergency response plan that tells workers what to do when someone gets hurt. This doesn't need to be a complicated document, but it needs to answer the questions that people under stress can't think clearly enough to figure out on their own: What number do you call for EMS? What's the address of this facility, including the building number or suite? Where is the first aid kit? Where is the AED? Who is the designated first aider on this shift? Is there a hospital or urgent care on the way here that EMS should know about?

These answers should be posted near every phone and emergency exit, included in new hire orientation, and reviewed annually. In multi-building campuses or facilities with unusual layouts, consider whether you need to station someone at the entrance to guide EMS when they arrive. In facilities where cell service is unreliable, know whether there's a landline available.

This kind of plan also dovetails with your broader emergency action plan required under 29 CFR 1910.38. If you have a written EAP (and if you have ten or more employees, you're required to), your first aid response procedures should be integrated into it rather than existing as a separate orphaned document.

Documentation: What You Need to Have Ready

If OSHA knocks on your door and asks about your first aid program, the records they'll want to see include: training certificates for your designated first aiders, including the dates of training and the provider; inspection records for first aid kits; the location and inspection records for any AEDs; and evidence that the program meets the needs of your specific hazards (which may include a sign-off from a physician or a documented hazard assessment that informed your kit selection).

Injuries treated with first aid on-site also affect your OSHA 300 recordkeeping. First aid treatment — as defined by 29 CFR 1904.7 — is not a recordable injury, but the line between first aid and medical treatment beyond first aid is precisely drawn and matters for your log. If a worker cuts their hand and you treat it with a bandage from the kit, that's first aid. If a doctor later removes and replaces that bandage in a way that constitutes wound closure, it may convert to a recordable. Understanding the distinction matters for keeping your 300 log accurate.

Getting the Program Right Isn't That Hard

A functional workplace first aid program for most small businesses comes down to five concrete things: trained first aiders on every shift, a properly stocked and inspected kit in an accessible location, an AED if your workforce size and hazard profile warrant it, a posted emergency response plan with facility address and key contacts, and annual training refreshers tied to real recertification. Most of this can be accomplished for under a few hundred dollars per year in training and supply costs once the initial setup is done.

What it requires more than money is intention — the decision to treat first aid readiness as a program rather than an assumption. The assumption is that someone will figure it out when the moment comes. A program is the recognition that the moment comes without warning, and that what happens in the first three minutes is often the difference between a full recovery and a funeral.

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Further Reading:

• OSHA Medical Services and First Aid: osha.gov/medical-first-aid
• ANSI/ISEA Z308.1 Workplace First Aid Kit Standard: isea.org
• American Heart Association Workplace Training: heart.org/heartsaverfirstaid
• NIOSH Occupational First Aid Resources: cdc.gov/niosh