An ambulance is on the way. That's what most employers are counting on.
Here's the problem with that plan. OSHA interprets near proximity for emergency medical care to mean within 3 to 4 minutes. Average EMS response times in the United States run 7 minutes in urban areas. In industrial and rural locations, 15 to 20 minutes is not unusual.
For cardiac arrest, that gap is fatal. Survival odds drop by roughly 10% for every minute that passes without CPR. By the time an ambulance arrives at a facility with a 10-minute response time, the realistic survival window has closed.
The math is not complicated. Your people are the response.
Source: OSHA Publication 3185-09N. Survival odds are approximate and vary by individual health factors.
What OSHA actually requires from your facility
OSHA regulation 29 CFR 1910.151 places the responsibility on employers to ensure medical help is available promptly. When professional emergency services cannot reliably reach your facility within 3 to 4 minutes, OSHA expects trained personnel on-site who can respond immediately.
Certain industries have even more explicit requirements written directly into their specific standards. Logging operations require a CPR-trained person at each worksite during every shift. Confined space operations require trained rescue teams. Shipyard operations mandate trained first-aid staff at each worksite during each workshirt unless EMS can arrive within 5 minutes.
Look at those response time requirements. Now look at how far your facility is from the nearest ambulance station.
Why online-only training does not count
This trips up a lot of employers. Online CPR courses are convenient, they generate a certificate, and they feel like they satisfy the requirement.
OSHA has explicitly stated otherwise. In a 2012 interpretation letter, OSHA confirmed that online training alone does not meet first-aid and CPR standards. These skills require hands-on practice with mannequins, partner exercises, and qualified instructor feedback. A digital completion certificate is not evidence of physical competence.
The reason matters practically, not just legally. Someone who watched a CPR video but never practiced chest compressions on a mannequin does not know whether they're applying enough force, whether their rate is correct, or whether their technique will actually work under the stress of a real emergency.
What a complete emergency readiness program looks like
- Hands-on CPR certification using AHA or Red Cross curricula with mannequin practice
- AED familiarization — not just knowing one exists, but actually using it
- Designated first-aid responders formally assigned per shift, not just volunteers
- Annual instructor-led recertification plus 6-month skills review
- Written Emergency Action Plan with documented AED and supply locations
- All employees able to answer, without hesitation, where the nearest AED is
What employers ask us about CPR and emergency planning
OSHA does not specify an exact ratio, but the standard requires that trained personnel are available — which means accessible during every shift, not just during business hours when your safety manager is present. A practical starting point is at least one certified responder for every 50 employees per shift, placed in departments where EMS response time would exceed the 3 to 4 minute OSHA window.
OSHA does not currently mandate AEDs in general industry, but strongly supports them. The survival rate difference between immediate CPR alone and CPR plus early defibrillation is significant. OSHA recommends employers assess whether an AED program is appropriate based on the size of the workforce, the distance from EMS, and the physical demands of the work. For most industrial facilities, the answer is yes.
Research on CPR skill retention shows meaningful decay within 6 to 12 months of training. The American Heart Association recommends a skills review at least every 6 months and full instructor-led recertification at least annually. Most certification cards are valid for 2 years, but card validity and actual skill retention are not the same thing. We design training schedules around retention research, not just certificate expiration dates.
OSHA requires most employers with more than 10 employees to have a written Emergency Action Plan under 29 CFR 1910.38. It must cover emergency reporting procedures, evacuation routes and procedures, employee accounting methods, rescue and medical duties for designated employees, and how employees will be notified. Facilities with fewer than 10 employees may communicate the plan verbally, but having it in writing is still strongly advisable.