The NR-9 is a Brazilian regulation that establishes the requirements for the evaluation and control of occupational exposures to chemical, physical and biological agents.
The NR-9 was originally published in 1978, under the title “Environmental Risks”. Over the years, it underwent several revisions and amendments, with the first significant change occurring in 1983, expanding the definition of environmental risks. The third alteration in 1994 transformed NR-9 into the “Environmental Risk Prevention Program (PPRA)”. The eleventh revision in 2020 represented a major overhaul, aligning NR-9 with a broader system-wide revision. The 2020 revision included a new structure in NR-9, with systematic evaluation and control of environmental agents in the main body and specific measures for each agent in the annexes.
The NR-9 applies to all employers who have workers exposed to environmental agents, regardless of the size or type of activity.
NR9 – Assessment and Control of Occupational Exposure to Physical, Chemical, and Biological Agents
(Last modified: SEPRT Ordinance No. 6.735, of March 10, 2020)