Monitoring and enforcement of policies and regulations related to stationary sources is primarily done through EMB Regional Offices (EMB-ROs)

DENR-EMB Accredited Third Party Source Emission Testing Firm conducts stack emission testing for compliance purposes. For Large Sources ( >750 tons/year), Installation of Continuous Emission Monitoring System (CEMS) is required. Prior to operations, firms are required to secure a Permit to Operate (PTO) for each source, designate a Pollution Control Officer (PCO) to oversee all appropriate duties regarding the operation of the air pollution source in control facilities, and submit quarterly self-monitoring reports (SMRs) to the DENR-EMB.