In order to guide employers in accurately identifying hazardous exposure risks in workers’ workplaces and to thoroughly protect workers’ health, the Ministry of Labor amended and promulgated the “Regulations Governing the Implementation of Labor Workplace Environmental Monitoring” on June 12, 2026. In addition to expanding the scope of monitoring items and strengthening the planning and execution quality of monitoring, this amendment also introduces a corporate self-management review mechanism, serving as an important basis for preventing occupational diseases and improving working environments. The key points of this amendment are as follows: 

1. Expanding Monitoring Items and Strengthening Monitoring Management: Thirteen hazardous chemical substances, including 1-bromopropane, formaldehyde, and ethylene oxide, have been newly incorporated into regular monitoring. In addition, high-risk industries such as foundries and artificial stone processing have been designated for additional monitoring of crystalline free silica concentration, in order to prevent occupational diseases such as silicosis. Furthermore, where monitoring results meet or exceed the permissible exposure standard, the monitoring frequency will be shortened from once every six months to once every three months, so as to urge business entities to promptly improve their working environments. 
2. Ensuring the Effectiveness of Exposure Assessment: The monitoring targets, sample quantities, frequency, and other relevant matters will be clearly announced to ensure that samples are representative, while employers will also be required to adopt appropriate sampling strategies and statistical analysis methods to accurately grasp workers’ actual exposure conditions. 
3. Expanding the Participation of Professional Personnel: The threshold for business entities required to form a monitoring assessment team to develop monitoring plans has been lowered from 500 or more employees to 300 or more employees, and the participation of professional personnel such as occupational hygiene technicians has been expanded to help business entities improve the quality of monitoring planning and exposure assessment. 
4. Encouraging Corporate Self-Management: Business entities with well-established workplace environmental monitoring systems, good management performance, and low long-term exposure risk may, upon review and approval by the central competent authority, reasonably adjust their monitoring frequency, so as to encourage enterprises to continue investing resources in strengthening self-management of monitoring. 
5. Strengthening the Management of Monitoring Institutions: It is expressly provided that where a monitoring institution deliberately avoids conducting monitoring during normal operations or at high-exposure work sites, it will be penalized in accordance with the law. At the same time, the capacity for inspection has been expanded, authorizing labor inspection authorities to entrust professional organizations to carry out inspections, in order to enhance the quality and credibility of monitoring. 

In addition, considering that the establishment of relevant supporting measures—such as the newly added monitoring items, the exposure assessment system, and the review mechanism for monitoring management performance—requires sufficient preparation time for employers, monitoring institutions, and relevant professionals, certain provisions of this amendment will take effect on January 1, 2027.