About
This page provides user notices issued by approval holders and industry partners. User notices are written notices provided to inform users of a condition or risk that may exist with a NIOSH Approved® product. NIOSH has reviewed and concurs with the facts in the below user notices.

User notices
- May 2024 - Stop Use and Action Notification: Additional 3M Scott Fire & Safety E-Z Flo and E-Z Flo+ Mask Mounted Regulators (MMR) shipped with missing latch screws
- April 2024 – 3M Scott Vibralert End-of-Service-Time-Indicator (EoSTI) failed to function adequately upon initial inspection
- March 2024 - Shigematsu – Clarification of Donning Method of N95 – Lambda-Line Series and additional "How to Donning" infographic.
- February 2024 - Champak Temporary Stop Sale of NIOSH-Approved Respirators
- February 2024 - FIDO User Notice Safety Bulletin
- January 2024 - Ocenco M-20.3 SCSR (Self-Contained Self-Rescuers (SCSR)/Emergency Escape Breathing Devices (EEBD) may be producing elevated inspired carbon dioxide and wet bulb temperature levels
Archived user notices
For user notices issued prior to 2024, please visit the links below.
Disclaimer
Links to non-Federal organizations do not constitute an endorsement of these organizations, their products, or programs by NIOSH and none should be inferred. NIOSH is not responsible for the content of the individual organization web pages found at these links. They are provided solely as a service to our users. A NIOSH certificate of approval is not an endorsement of the respirator by NIOSH. Such endorsements are not to be stated or implied by manufacturers in advertisements or other publicity. NIOSH certification represents that the equipment has met the requirements of Title 42, Code of Federal Regulations (CFR) Part 84.
- NIOSH Approved is a certification mark of the U.S. Department of Health and Human Services (HHS) registered in the United States and several international jurisdictions.