Traditional, estimate-based reporting can't keep pace with this level of scrutiny. Engineering factors and desktop calculations leave too much room for error, and stakeholders know it. Investors managing trillions in assets now demand verifiable, measurement-based data before they'll sign off on a company's environmental claims.
That's where OGMP 2.0 comes in. It's the leading international framework for methane reporting, and Level 5 sits at the top as the industry's proof point for real operational control. This article breaks down what Level 5 actually requires and how operators get there.
Key Takeaways
- OGMP 2.0 Level 5 requires reconciling bottom-up source data with top-down site measurements.
- Gold Standard status requires Level 4/5 reporting on all material assets within three years.
- Periodic surveys miss most intermittent leaks, making continuous monitoring essential for Level 5.
- A phased rollout starting with a pilot baseline offers the most practical path to compliance.
What is OGMP 2.0 and the Gold Standard?
The Oil and Gas Methane Partnership (OGMP) 2.0 is a voluntary initiative launched by the UN Environment Programme (UNEP) and the Climate and Clean Air Coalition. It's built to give the industry a credible, transparent way to measure and report methane emissions across the entire value chain, from upstream production to downstream distribution.
The program has grown fast, expanding well beyond its original founding group:
- Founding companies (2020): 62
- Current membership: over 150 companies across 90+ countries
- Production coverage: roughly 45% of global oil and gas production
- LNG coverage: over 80% of global LNG flows
Within this framework, the Gold Standard is the highest recognition a company can earn. To achieve it, an operator must bring all material assets, meaning those accounting for the top 95% of its methane emissions, up to Level 4 or Level 5 reporting.
This isn't a participation trophy. It signals that a company's emissions data can withstand real scrutiny from regulators, investors, and watchdog groups alike.
The OGMP 2.0 Reporting Levels: A Quick Breakdown
OGMP 2.0 organizes reporting into five progressive levels, each one moving a company further from estimates and closer to direct measurement.
Levels 1 through 3 rely on generic or company-specific emission factors and engineering estimates. Most operators start here, and this tier often overlaps with basic regulatory filings like GHGRP Subpart W. It's a reasonable starting point, but it doesn't hold up well when someone asks for proof.
The real shift happens at the top two levels:
| Level | What It Measures | Method |
|---|---|---|
| 4 | Individual emission sources (such as a specific pneumatic controller or tank) | Direct source-level measurement |
| 5 | Entire site or facility, reconciled against source data | Site-level measurement plus reconciliation |
Level 4 requires that source-level quantification cover at least 70% of an asset's methane emissions, with justification needed if coverage falls below 90%. Level 5 takes that source data and checks it against a complete site-level picture, which is a distinctly different, more demanding exercise.
Deconstructing Level 5: The Pinnacle of Methane Reporting
Level 5 marks a shift from measuring individual sources to verifying the total emissions profile of an entire site. This is a fundamentally different way of thinking about accuracy than Level 4's incremental improvements. Three core requirements define it.
1. Comprehensive Site-Level Measurement
Level 5 demands "top-down" measurements that capture total emissions from a defined boundary, whether that's a well pad, a compressor station, or a full facility footprint.
This differs sharply from Level 4's "bottom-up" approach of adding up individual source readings. Bottom-up inventories are only as good as the list of sources they include, and that list is often incomplete. Site-level measurement routinely uncovers emission sources that bottom-up methods miss entirely, including intermittent releases from equipment nobody flagged as a risk.
2. Reconciliation of Source and Site Data
This is the hardest part of Level 5, and it's the entire point of the exercise. Reconciliation means comparing the bottom-up inventory built from Level 4 activities against the top-down site measurement, then explaining the gap.
That gap is often larger than operators expect. A national synthesis of the U.S. oil and gas supply chain estimated methane emissions at 13 teragrams per year in 2015, roughly 60% above the EPA's inventory estimate at the time.
That figure is specific to a particular study and year, not a universal OGMP benchmark, but it illustrates why reconciliation matters. It catches discrepancies and sharpens emission factors, producing an inventory that can defend itself under scrutiny.
OGMP describes reconciliation as an iterative, year-over-year investigation, not a one-time correction. Each cycle should narrow the gap between what a company assumes it's emitting and what it's actually emitting.
3. Independent Verification
Level 5 data isn't meant to be self-reported and left unchecked. The framework calls for site-level measurements to be independent in method or technology from the source-level techniques used for the Level 4 inventory. That's methodological independence, not necessarily a requirement that a separate outside firm perform every measurement.
OGMP itself conducts assurance reviews of implementation plans and reported data when recognizing assets at Level 5. For non-standard methods, using providers accredited to ISO/IEC 17025 adds another layer of confidence. The result: data strong enough to hold up under scrutiny from regulators, investors, and anyone else asking hard questions. Continuous multi-sensor monitoring platforms already aligned with OGMP 2.0 Level 4/5 frameworks generate this kind of methodologically independent, site-level data as part of routine operations, giving operators a head start toward Level 5 assurance.
The Technology Imperative: Why Continuous Monitoring is Essential for Level 5
Quarterly OGI surveys and periodic flyovers produce snapshots. Level 5 requires a complete picture. Those aren't the same thing, and the difference matters more than most operators realize.
Field research on continuous monitoring at U.S. production facilities found that most intermittent emissions remained undetected during the first year of periodic inspections, regardless of how often the surveys ran, according to research published in ACS ES&T Air.
If a leak starts and stops between site visits, a quarterly survey simply never sees it. Site-level quantification and reconciliation require data that doesn't have those blind spots.
Technology built for Level 5 needs three things:
- Continuous operation — running 24/7 in all conditions to capture the full duration and frequency of emission events, not just a moment in time.
- Multi-sensor approach — combining sensing modalities like optical gas imaging, acoustic equipment monitoring, and visual data to add context and separate normal operations from true fugitive emissions. Well Checked has a USPTO provisional patent filing covering its acoustic anomaly detection technology.
- AI and analytics — software capable of processing enormous data volumes, filtering false positives, quantifying emission rates, and automating reconciliation.
This is the gap Well Checked built its platform to close. The Zensory.ai™ system pairs Zentinal Core™ for detection with Zentinal IQ™ for quantification, combining sight (high-resolution video), sound (acoustic anomaly AI), and infrared gas imaging (LWIR optical gas imaging) into a single continuous monitoring stack.
At production scale, the numbers show what that looks like in the field:
- Over 1,500 videos analyzed per site, per day
- remote wellsites in six basins under continuous monitoring
- 220-site deployment across the Appalachian Basin
Each site runs through an AI Site Learning cycle, roughly two days, during which the system builds a site-specific baseline of normal operations. Once that baseline is set, alerts fire only on genuine deviations, filtering out the noise that overwhelms operators running generic threshold systems.
Zentinal IQ™ then quantifies validated events by volume, duration, and rate, generating the source-level records that feed directly into OGMP 2.0 Level 4/5 reporting formats. That's the "From Detection to Defensible Data" approach in practice.
Your Roadmap to Achieving and Sustaining OGMP 2.0 Level 5
Getting to Level 5 doesn't happen in one leap. A phased approach works better and reduces risk along the way.
Establish a measurement-based baseline. Deploy continuous monitoring on a pilot basis at representative sites before a full rollout. Well Checked's fixed-fee pilot program runs each site through the same AI Site Learning process used at scale, delivering real baseline data and a clear view of your biggest emission gaps.
Scale technology and integrate data. Roll out monitoring across all material assets in phases, prioritizing a platform that combines source-level and site-level data streams for automated reconciliation. Well Checked's SCADA API integration and portfolio-scale experience across sites in the Appalachian, Permian, Anadarko, Bakken, Eagle Ford, and Denver-Julesburg basins support this scale-up.
Formalize and continuously improve. Reaching Level 5 isn't the finish line. Use the continuous data stream to drive proactive maintenance, refine field practices, and prove ongoing emissions reductions against your baseline. Multi-year data retention gives you a defensible, longitudinal record for regulators and investors.
Frequently Asked Questions
What does OGMP stand for?
OGMP stands for the Oil and Gas Methane Partnership, a UN-led initiative launched by UNEP and the Climate and Clean Air Coalition to improve methane emissions reporting across the sector.
What is the OGMP methodology?
The OGMP methodology is a five-level reporting framework that guides companies from generic emission estimates toward direct, measurement-based quantification, with each level requiring greater data accuracy than the last.
What is OGMP 2.0 Level 5?
Level 5 is the highest reporting standard in the framework. It requires reconciling site-level (top-down) measurements with source-level (bottom-up) inventories to produce a complete, verified emissions profile.
What is the difference between OGMP 2.0 Level 4 and Level 5?
Level 4 focuses on measuring individual emission sources using a bottom-up approach. Level 5 goes further, requiring that data be reconciled against total site-level measurements to confirm accuracy and completeness.
How long does it take to achieve OGMP 2.0 Gold Standard?
Companies must reach Level 4/5 for material operated assets within 3 years of joining, and within 5 years for non-operated assets. Most operators treat this as a 3-5 year roadmap, though measurement-based platforms like Well Checked's Zentinal IQ™ can shorten that timeline by delivering reconciled site-level data from day one.
