Compliance and regulations

What Is Methane Emissions Reporting for Gas Utilities?

What methane emissions reporting means for gas distribution utilities: which reports apply, what leak and repair records to keep, and how to prepare for audits.
What Is Methane Emissions Reporting for Gas Utilities?

For US Utilities serving 3,000-100,000 meters and for operations team, billing team and utility managers. For Heads of Billing who own collections accuracy and revenue leakage.

Key Takeaways
  • Distribution methane reporting is mostly a leak, repair, and asset records problem.
  • The PHMSA annual report counts repaired leaks by cause, separately for mains and services.
  • EPA proposed removing gas distribution from subpart W reporting after reporting year 2024.
  • The PHMSA leak detection rule was not codified as of May 2025.
  • Tie every leak to a grade, cause, work order, and asset.

Methane emissions reporting is the process of measuring, recording, and submitting data on the methane a gas system releases, mainly from pipe leaks. For a gas distribution utility, the reporting that applies most directly is its annual pipeline safety report to PHMSA, which counts leaks repaired by cause, plus any state requirements and the EPA greenhouse gas program where it still applies. The reports are only as good as the leak, repair, and asset records behind them.

What Is Methane Emissions Reporting for Gas Utilities?

Methane is the main component of natural gas. When it escapes from a pipe, valve, meter set, or regulator station, it is both a safety hazard and a greenhouse gas. Methane emissions reporting is how a gas operator shows regulators, and increasingly customers and lenders, how much gas is escaping, where it escapes, and what the operator did about it.

For a gas distribution utility, most of that picture comes from leaks on mains and service lines. The operator finds a leak through a survey or a customer call, grades it, repairs it, and records the result. Reporting is the step that turns those individual records into the totals a regulator asks for.

This page covers distribution operators: municipal gas systems, investor-owned local distribution companies, and multi-service utilities that sell gas alongside water or electricity. If your utility also runs a gas utility management platform, the same customer, asset, and work order records feed these reports.

Upstream operators such as producers, gathering systems, and processing plants report under different segments and different rules. Searches for "methane emissions reporting oil and gas" mostly describe those segments. A distribution utility has no wellheads or compressor stations, so its reporting centers on the pipe in the ground and the meters on customer premises.

Who Asks for Methane Data

A gas distribution utility answers to several audiences, and each asks for a different cut of the same underlying leak data. The rules in this area changed repeatedly across 2025 and 2026, so each item below is described as the source document states it, and the table ends with where to check current status. Our overview of city gas distribution trends covers the wider industry shifts behind these requirements.

RequirementWhat it asks forWho filesStatus to check
PHMSA annual report (49 CFR Part 191)Miles of main, services, and leaks repaired by cause, split into total and hazardousAll gas distribution operatorsIn force; reporting rules are in 49 CFR Part 191
PHMSA leak detection and repair ruleAdvanced leak detection program, survey frequencies, equipment performance standards, recordsDistribution, transmission, and gathering operatorsIssued January 2025; GTI reported it was not codified as of May 13, 2025
EPA Greenhouse Gas Reporting Program, subpart WAnnual emissions estimates by segment, including natural gas distributionFacilities above the program's reporting thresholdsEPA proposed in September 2025 to remove the distribution segment after reporting year 2024
State utility commission rulesLeak grading, repair timelines, and annual leak summaries, which vary by stateOperators in that stateCheck the state commission
Investor, lender, and customer requestsEmissions intensity, leak repair rates, and pipe replacement progressUtilities with financing or ESG reporting needsVaries by requester

The EPA fact sheet states that, under the proposal, facilities in the natural gas distribution segment of subpart W would no longer report to EPA after reporting year 2024 (EPA). A proposal is not a final rule. Before relying on it, check EPA's rulemaking notices page for the final action.

The PHMSA rule faces the same caution. A policy brief from GTI Energy's Center for Methane Research notes that the January 2025 final rule had not been published in the Code of Federal Regulations as of May 13, 2025, and that its requirements could change before codification (GTI Energy). The same brief still describes the rule as a good best practice for leak detection and repair, which is why many operators use it to plan their programs.

What Gas Distribution Operators Need to Track

Whatever the final shape of federal rules, the data a regulator, auditor, or lender will ask for is consistent. These are the records that need to exist for every leak:

  • Leak identification. Date found, how it was found (survey, customer call, excavation damage report), and the location tied to a specific main, service line, or meter set.
  • Leak grade and priority. The grade assigned, who assigned it, and the date, since repair timelines depend on grade.
  • Cause. Corrosion, excavation damage, natural force damage, pipe or weld failure, or other. The PHMSA annual report breaks repaired leaks out by cause for mains and for services (PHMSA form data fields).
  • Repair details. Date repaired, crew, repair method, and whether the repair was hazardous or non-hazardous.
  • Asset link. The pipe material, diameter, install year, and protection type of the segment, because risk-based survey and replacement programs depend on them.
  • Survey history. Which equipment surveyed which area on which date, and whether the equipment was validated.

Each of those records usually starts as a work order. A structured gas pipeline work order system captures the date, crew, and completion details at the time the repair happens, rather than asking someone to reconstruct them at year end.

Methane Reporting, Step by Step

Every operator builds this process a little differently, but the sequence is consistent.

  1. Detect. Find the leak through scheduled surveys, advanced leak detection equipment, or customer reports.
  2. Grade and prioritize. Assign a grade that sets the repair deadline, and record who graded it and when.
  3. Create the work order. Link the leak to the specific asset and location so the repair has an owner and a due date.
  4. Repair and close out. Record the cause, repair method, date, and whether the leak was hazardous.
  5. Aggregate by period. Roll the closed records up by cause, pipe type, and main versus service line for the reporting year.
  6. Submit and retain. File the required reports, such as the PHMSA annual report, and keep the underlying records for audit.

Step three is where most reporting problems begin. If a leak is found but never tied to a work order and an asset, it cannot be counted correctly at step five.

Leak Records Are a Records Problem

Methane reporting is often described as a measurement challenge, but for a distribution utility it is mostly a records challenge. The measurement happens in the field. The reporting depends on whether the records from the field can be found, matched, and totaled months later.

Utilities that struggle with leak reporting usually fail one of these checks:

Can you list every leak found this year, with its grade, cause, and repair date, without searching through paper forms or spreadsheets?

Can you tell which pipe material, install year, and protection type each repaired leak occurred on?

Can you show that the leak survey equipment you used was validated, and when?

Can a second person produce the same annual totals from the same records?

If the answer to any of these is no, the first project is the record system, not the report. Pipe and equipment details come from the asset register; our guide to gas utility asset management software explains what those records should contain and how they connect to pipe replacement planning.

What the PHMSA Leak Rule Adds for Records

The GTI brief summarizes the January 2025 PHMSA rule in terms that matter for recordkeeping. Operators of gas distribution, transmission, and some gathering pipelines would need an advanced leak detection program with written procedures for each piece of equipment, and a list of the equipment used for screening and leakage surveys (GTI Energy).

According to the same brief:

  • Leak detection equipment must be validated at least once before use, and the validation records must be kept for five years after the model is no longer used in the program.
  • Distribution survey frequency would depend on risk: business districts once per year, not exceeding 15 months, and pipelines known to leak once per year, with non-business districts once per five years, not exceeding 63 months.
  • Handheld equipment must meet a minimum sensitivity of 5 ppm, and distribution screening equipment must detect releases of 0.2 kg/hr or more with a 90 percent probability of detection.
  • Operators must evaluate and document the effectiveness of their program once every three calendar years, not exceeding 39 months, considering the number of leaks found and estimated emissions from leaks.
  • PHMSA estimated emissions reductions of 13 to 30 percent from distribution pipelines.

Even if the rule changes before it is codified, these elements show what regulators and auditors are likely to value: survey records by area and date, equipment validation records, and a measured count of leaks found and fixed.

Measuring, Reducing, and Reporting

Three separate jobs are often grouped under "methane management." They use different tools and different teams, and only one of them is reporting.

JobQuestion it answersTypical toolsOutput
MeasuringHow much gas is escaping and where?Handheld detectors, mobile survey vehicles, aerial or satellite screening, fixed sensorsLeak indications and estimates
ReducingWhat should be repaired or replaced first?Leak grading, risk-based replacement planning, work ordersRepaired leaks, retired pipe
ReportingWhat can we show to others, and is it consistent?Records system, annual reports, audit filesFiled reports and retained records

A utility can do the first two well and still struggle with the third if the results are stored in different places. Larger operators in the natural gas distribution companies of North America often have dedicated compliance staff for this. A municipal gas system with a small team usually does not, which makes a single system of record more important.

What Auditors and Regulators Ask For

Inspectors from a state commission or a PHMSA state partner usually look at the same set of items. Preparing them in advance shortens an audit.

  • A complete list of leaks found and repaired in the period, with grade, cause, and dates.
  • Evidence that repairs were completed within the required timelines for each grade.
  • Survey records showing the area covered, the equipment used, and the date.
  • Equipment calibration and validation records.
  • The written procedures that were in force on the date of each activity.
  • Supporting documents for any totals reported in the annual report.

Utilities that keep these records in a work order and asset system can generate them as filtered reports. Utilities that keep them in separate spreadsheets typically assemble them by hand each year.

Where SMART360 Fits

SMART360 is a utility management platform. It does not detect leaks, calculate emissions, or file regulatory reports on a utility's behalf. What it provides is the record system that those activities depend on, on one database:

  • Work orders with crew assignments, due dates, and completion details for every repair.
  • Asset records for pipe, valves, and meters, linked to the service points they serve.
  • Customer accounts and service points, so a leak report from a customer connects to the right location.
  • Reports that filter records by period, status, or asset type.
  • A customer portal and communication tools for outage and service notices.
Reporting needWhat the utility must doSMART360 role
Repair evidenceShow that each leak was repaired and whenTracks work orders from creation to completion
Asset contextTie each leak to a pipe type and install yearKeeps asset records linked to service points
Annual totalsAggregate repaired leaks by cause and line typeProvides reports on work order and asset data
Data sharingMove records to GIS, survey tools, or a regulatory filing systemConnects through 25+ pre-built integrations and APIs

Leak survey instruments, GIS, and filing portals stay in place. SMART360 connects to them so the same records are not entered twice.

Frequently Asked Questions

What is methane emissions reporting?

Methane emissions reporting is the process of measuring, recording, and submitting data on the methane released by a gas system. For a gas distribution utility, this mostly means leak records on mains and service lines, summarized in reports such as the annual PHMSA filing, state commission reports, and, where it applies, the EPA greenhouse gas program.

Do gas distribution utilities have to report methane emissions to EPA?

It depends on the current status of the rule. EPA's September 2025 proposal would remove the natural gas distribution segment of subpart W from the Greenhouse Gas Reporting Program after reporting year 2024. A proposal is not final, so check EPA's rulemaking notices page for the latest action before deciding what to file.

What does a gas utility report to PHMSA about leaks?

Gas distribution operators file an annual report under 49 CFR Part 191. It includes miles of main and numbers of services, and leaks repaired during the year by cause, separately for mains and services, with totals and hazardous counts.

What is the difference between methane emissions reporting for distribution and for oil and gas?

Upstream oil and gas operators report emissions from wells, gathering, processing, and compression facilities. A distribution utility reports on pipe, regulators, and meters in its service territory, so its data comes mainly from leak surveys, repairs, and pipe records rather than from process equipment.

Does SMART360 file methane emissions reports?

No. SMART360 does not detect leaks, calculate emissions, or submit regulatory filings. It keeps the work orders, asset records, and service point records that those reports are built from, and connects to other systems through pre-built integrations and APIs.

See SMART360 in Action

Methane reports are built from leak, repair, and asset records. SMART360 keeps work orders, asset records, customer accounts, and service points on one database, so the totals a regulator asks for come from one place instead of several spreadsheets.

See SMART360 in action

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