Standard Application Procedures for each class of respirator.
Collection of NIOSH Conformity Assessment Notices and Letters.
- List of application-based fees and corresponding STPs for air-purifying respirators.
- List of application-based fees and corresponding STPs for air-supplied respirators.
- List of application-based fees and corresponding STPs for combination CBRN APRs/ASRs.
- Information for manufacturers on how to apply for respirator approval.
- Information on NIOSH's respirator post-market conformity evaluations.
Search NIOSH Approved® Respirators
New and Noteworthy
![[thumbnail] (hidden)](/niosh/media/images/2025/09/PPE-Case-Report-Thumbnail_Page_01.png)
Details the results of performance testing on fraudulent respirator filters and cartridges
![[thumbnail] (hidden)](/niosh/media/images/2025/09/Fraudulent-Cartridges-and-Filters-Fail-to-Meet-NIOSH-Performance-Requirements-P100-Filters-508.png)
This PPE Case Notes shares the results of fraudulent P100 filter performance testing.
![[thumbnail] (hidden)](/niosh/media/images/2025/09/Fraudulent-Cartridges-and-Filters-Fail-to-Meet-NIOSH-Performance-Requirements-Combination-Cartridges_508.png)
This PPE Case Notes shares the results of fraudulent combination cartridge performance testing.