As the market for Responsibly Sourced Gas (RSG) grows, the demand for independent certification also rises. However, with increased demand, a differentiation between the scope and depth of certification companies has arisen, leading to uncertainty and confusion in the market. To address this, Project Canary has prepared the following guide to help explain the differences between the current vernaculars.


Responsibly-Sourced Gas has undergone an independent, third-party certification assessing sustainability through operational excellence and environmental stewardship across various categories, including air, water, land, and community.

A fundamental focus of RSG is the importance of engineering throughout the process. Environmental stewardship doesn’t just begin when the well starts producing. It begins in the design phase of a wellbore and encompasses all phases of operations.

Operators producing RSG demonstrate their commitment to sustainable operations by mitigating, monitoring, and measuring their emissions, tracking and reducing operational stress on local water resources, and limiting the effects of operations on the affected land and community. All of which has been assessed by an independent, third party.


Certified Low Emissions Gas (CLEG) is Certified Gas that emphasizes methane intensity and may or may not have requirements surrounding monitoring technology and frequency. The most common protocols for methane intensity are:

  • ONE Future Methane Emissions Estimation Protocol
  • NGSI Methane Emissions Intensity Protocol.

These established protocols utilize data from the EPA’s Greenhouse Gas Reporting Program (GHGRP) and Subpart W.

CLEG does not evaluate impacts outside of an emissions profile.

Operational Certification (“C”)

A key component of both of these programs is using an independent, third party to conduct the certification. Allowing independent, third-party organizations to review, collect, and manage data avoids the risk of potential conflicts of interest or charges of “greenwashing.”

Project Canary Certified Responsibly Sourced Gas: Tip-to-Tip

Project Canary’s TrustWell certification is recognized as the most comprehensive certification in the market. TrustWell is rooted in fundamental engineering principles and involves unmatched granularity using 600 distinct data points. Project Canary Engineers review policy, plan, and execution practices across 27 different categories and operational phases. Additionally, our verified attribute suite, including Low Methane & Freshwater, incorporates qualitative and quantitative dynamic components to complement the TrustWell certification further. Additionally, we deploy continuous monitoring devices that record emissions in real-time for ongoing mitigation and risk management. So whether you are concerned about your methane emissions, total volatile organic compound (TVOC) levels, ozone issues, or fugitive emissions, our sensors and high-fidelity dashboard put ESG performance data at your fingertips.


About Project Canary

Project Canary is an independent certification organization that measures, tracks, and delivers trusted ESG data across the energy value chain. They are the leaders in the rating and certification of responsible energy operating practices and provide science and technology-backed emission profiles via continuous monitoring hardware synced with a real-time dashboard. Project Canary Upstream (TrustWell) Certifications, Midstream Certifications, and Canary Continuous Monitoring help identify the most responsible energy supply chain operators. Formed as a Public Benefit Corporation, Project Canary’s team of scientists, engineers, and seasoned industry operators have earned recognition for their uncompromising standards, including being named “Best for the World 2021” B Corp. projectcanary.com