The Respiratory Protection Standard is the OSHA rule that governs how employers select, fit, maintain and train workers on respirators. It protects employees who breathe harmful dusts, fumes, mists, gases, vapors or oxygen-deficient air when engineering controls cannot reduce those hazards to safe levels.
A respirator only works if it is the right type, fits the wearer's face and is worn correctly every time. That is why the standard requires a full program, not just a box of masks. It ranked sixth in OSHA's preliminary fiscal year 2026 list of the most frequently cited standards.
What Is the Respiratory Protection Standard?
The standard is codified at 29 CFR 1910.134 in Subpart I (Personal Protective Equipment) of the general industry rules. Construction has its own respiratory protection section at 1926.103.
Paragraph (a)(1) sets the order of priority: the primary goal is to prevent contaminated air through engineering controls, such as enclosure, ventilation and substitution. Respirators are required when those controls are not feasible or while they are being put in place. This reflects the hierarchy of controls, where PPE is the last line of defense.
Key terms in 1910.134(b) include:
- Filtering facepiece: a negative pressure particulate respirator where the facepiece itself is the filter, often called a dust mask, such as an N95.
- Tight-fitting facepiece: a respiratory inlet covering that forms a complete seal with the face.
- Assigned protection factor (APF): the workplace level of protection a class of respirator is expected to provide when used within an effective program.
- IDLH: an atmosphere immediately dangerous to life or health, which poses an immediate threat to life, would cause irreversible health effects or would impair the ability to escape.
Who Must Comply?
Any employer whose employees must wear respirators to protect their health must establish and implement a written respiratory protection program under 1910.134(c).
Voluntary use is treated differently. If an employer lets employees wear respirators when they are not required, it must provide the information in Appendix D. For voluntary use of respirators other than filtering facepieces, the employer must also run the parts of a program needed to make sure the employee is medically able to use the respirator and that it is cleaned, stored and maintained. Employees whose only use is the voluntary use of filtering facepieces do not need to be in a written program.
State Plan states enforce their own respiratory protection rules, which must be at least as effective as the federal standard. Many substance-specific OSHA standards, such as those for silica, lead and asbestos, add their own respirator requirements on top of 1910.134.
Key Requirements
Written program and administrator, 1910.134(c)
The worksite-specific written program must cover respirator selection, medical evaluations, fit testing, routine and emergency use, cleaning, storage, inspection and maintenance, breathing air quality, training on hazards and on proper use, and periodic program evaluation. A suitably trained program administrator oversees it. Respirators, training and medical evaluations must be provided at no cost to employees.
Selection, 1910.134(d)
Employers must select NIOSH-certified respirators based on the hazards and workplace factors, and must evaluate exposures to do so. If exposure cannot be reasonably estimated, the atmosphere must be treated as IDLH. For IDLH atmospheres, only a full facepiece pressure demand SCBA certified for at least 30 minutes or a full facepiece pressure demand supplied-air respirator with an auxiliary SCBA is allowed. For other atmospheres, employers use the APF table and maximum use concentrations. Air-purifying respirators used for gases and vapors need an end-of-service-life indicator or a documented cartridge change schedule.
Medical evaluation, 1910.134(e)
Before an employee is fit tested or uses a respirator, a physician or other licensed health care professional (PLHCP) must determine that the employee is medically able to wear it, using the Appendix C questionnaire or an equivalent exam. The employer receives only a written recommendation on whether the employee can use the respirator and any limitations. Additional evaluations are required when an employee reports symptoms, when the PLHCP or supervisor recommends it, when fit testing or program evaluation indicates a need, or when workplace conditions change in a way that substantially increases physiological burden.
OSHA has proposed removing some medical evaluation requirements for filtering facepiece respirators and loose-fitting PAPRs. As of this writing that proposal has not been finalized, so the current requirements still apply.
Fit testing, 1910.134(f)
Every employee using a tight-fitting facepiece must pass a fit test with the same make, model, style and size before first use, whenever a different facepiece is used and at least annually after that. An additional test is required when the employee's physical condition changes in a way that could affect fit, such as facial scarring, dental changes, cosmetic surgery or an obvious change in body weight. Qualitative fit testing may be used only for negative pressure air-purifying respirators that must achieve a fit factor of 100 or less. A quantitative test passes with a fit factor of at least 100 for half facepieces and at least 500 for full facepieces.
Use, 1910.134(g)
Tight-fitting respirators may not be worn by employees with facial hair that comes between the sealing surface and the face, or any condition that interferes with the seal or valve function. Users must perform a user seal check every time they put on a tight-fitting respirator. IDLH entries require at least one standby employee outside, and interior structural firefighting requires the two-in, two-out practice.
Maintenance and breathing air, 1910.134(h)–(i)
Respirators must be cleaned and disinfected, stored to protect them from damage and contamination, and inspected before each use and during cleaning. Emergency-use respirators must be inspected at least monthly and before and after each use, with the inspection certified on a tag or record. Compressed breathing air must meet at least Grade D quality, with oxygen between 19.5% and 23.5%, carbon monoxide at or below 10 ppm and carbon dioxide at or below 1,000 ppm.
Training and Recordkeeping
- Training, 1910.134(k): Before use, employees must be able to show they know why the respirator is needed, its limitations and capabilities, how to inspect, put on, remove, seal check, maintain and store it, how to use it in emergencies, and the signs of medical problems that can limit use.
- Retraining: At least annually, and sooner when workplace conditions or respirator types change or an employee's knowledge or use is inadequate.
- Medical records, (m)(1): Kept in accordance with 29 CFR 1910.1020, which generally means for the duration of employment plus 30 years.
- Fit test records, (m)(2): Record the type of test, employee name, respirator make, model, style and size, test date and results. Keep them until the next fit test is done.
- Written program, (m)(3): Keep a written copy of the current program and make it available to employees and OSHA.
Common Violations and Penalties
- No written program, or a generic template that does not reflect the site's hazards and respirators.
- Employees fit tested or wearing respirators before a medical evaluation.
- Annual fit tests missed, or fit tests done on a different model than the one issued.
- Tight-fitting respirators worn over beards or stubble.
- No cartridge change schedule for gases and vapors.
- Voluntary users of elastomeric respirators who were never given Appendix D or medically cleared.
OSHA's penalties page lists a maximum of $16,550 per serious or other-than-serious violation and $165,514 per willful or repeated violation for penalties assessed after January 15, 2026. State Plan states set their own amounts.
How to Comply: Step by Step
- Assess exposures. Use air monitoring or objective data to identify the contaminants and levels employees face. An industrial hygiene assessment is often the starting point.
- Try other controls first. Evaluate substitution, ventilation and enclosure before relying on respirators.
- Select respirators. Choose NIOSH-certified models with adequate APFs and offer enough sizes and models.
- Write the program. Name an administrator and document every element in 1910.134(c).
- Arrange medical evaluations. Provide the questionnaire confidentially to a PLHCP and track clearances.
- Fit test and train. Fit test on the exact model issued and train before first use, then repeat both at least annually.
- Set up maintenance. Define cleaning, storage, inspection and cartridge change schedules.
- Evaluate the program. Ask wearers about fit and comfort and correct problems found.
How SMS360 Helps
The SMS360 Training Management module helps teams keep respirator training, fit test dates and medical clearance status organized by employee, with expiry reminders so annual fit tests and retraining are not missed.
The written program and fit testing procedures can be stored in a central document library, monthly emergency respirator inspections can be completed with digital checklists on a mobile device, and gaps found during program evaluations can be assigned as corrective actions and tracked to closure. For more on PPE programs generally, see the glossary entry on personal protective equipment.
Frequently Asked Questions
How often is respirator fit testing required?
Fit testing is required before first use, whenever a different respirator facepiece is used, and at least annually after that. An additional fit test is needed when an employee's physical condition changes in a way that could affect fit, such as significant weight change or dental work.
Do employees who voluntarily wear N95s need to be fit tested?
No. When an employer allows voluntary use of a filtering facepiece such as an N95, the employee does not need to be included in a written program, medically evaluated or fit tested. The employer must still provide the information in Appendix D of the standard and make sure the respirator does not itself create a hazard.
Can employees with beards wear respirators?
Not tight-fitting ones. OSHA prohibits tight-fitting facepieces when facial hair comes between the sealing surface and the face or interferes with valve function. Employees with beards may be able to use loose-fitting respirators, such as a loose-fitting PAPR or hood, if that type gives enough protection for the hazard.
How long must respirator fit test records be kept?
Fit test records must be kept until the next fit test is administered. Medical evaluation records are kept under 29 CFR 1910.1020, which generally requires retention for the duration of employment plus 30 years.
