The EPA has finalized major updates to the Ethylene Oxide NESHAP rule (40 CFR Pt 63, Subpart O), introducing PS-19 and QA Procedure 7 for certifying and maintaining compliance with EtO Continuous Emissions Monitoring Systems (CEMS). These changes significantly alter how sterilizers manage environmental compliance, requiring facility upgrades and new monitoring systems to drastically reduce EtO emissions. Picarro anticipated these regulatory shifts early, leveraging decades of expertise to offer a PS-19-compliant managed service suite, including CEMS, workplace, fenceline, and mobile monitoring solutions. Trusted by industry stakeholders, Picarro’s advanced technology and expert Environmental Systems team are ready to guide facilities through the complex regulatory landscape, ensuring seamless compliance and peace of mind.