In March 2025, Qube Technologies won EPA approval as an Alternative Test Method for methane periodic screening under NSPS Subpart OOOOb, EG Subpart OOOOc and Subpart OOOOa. Operators can now rely on Qube’s continuous monitoring system instead of—or alongside—optical gas imaging or Method 21 surveys.

Our report explains the regulatory context, shows how Qube meets EPA performance thresholds and highlights a case study where periodic screening cut site inspections.

It’s a practical guide for oil and gas teams seeking compliant, cost-effective and scalable emissions monitoring.