Original data research published by PlainCarbon, compiled directly from EPA GHGRP data, no hardcoded numbers.
What this research covers
PlainCarbon research ranks EPA GHGRP parents, states, and industries from the 2023 reporting-year census (2,268 parents, 6,455 facilities, 2.38 billion MT CO₂e), answering one ranking question per study.
Studies below answer one emissions-ranking question each from the live GHGRP extract; they are descriptive registry summaries, not climate or investment advice.
According to the Environmental Protection Agency Greenhouse Gas Reporting Program extract reviewed in August 2026 against our methodology, this directory covers 87,624 facility-year emission rows.
PlainCarbon ranks US parent companies by total CO2-equivalent emissions reported across all their facilities to the EPA GHGRP. Computed directly from the underlying facility-level EPA GHGRP records.
PlainCarbon ranks US states by total CO2-equivalent emissions reported to the EPA GHGRP. Computed directly from the underlying facility-level EPA GHGRP records.
PlainCarbon ranks NAICS-based industry groupings by total CO2-equivalent emissions reported to the EPA GHGRP. Computed directly from the underlying facility-level EPA GHGRP records.
Download the compiled state aggregate as ghgrp-state-statistics.csv (same CSV as /statistics). When reusing the table, name PlainCarbon as the compiler; underlying EPA GHGRP facility reports remain public-source.
Every figure on PlainCarbon is rendered directly from EPA Greenhouse Gas Reporting Program (GHGRP) data, no number is typed in by an editor. This page draws directly on the EPA Greenhouse Gas Reporting Program (GHGRP), no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. For the boundaries on using this data, read our privacy policy, terms of use, and appropriate-use disclaimer.