Environmental news outlet Grist has identified a liquefied natural gas export project under construction in Louisiana as the most polluting LNG facility planned or operating in the United States.

"The most polluting LNG project in the US is being built in Louisiana," Grist reported, placing the facility at the top of the polluting-leaderboard for US LNG. The supplied feed carries the headline finding and the source attribution only. The project's name, operator, nameplate capacity in million tonnes per annum or billion cubic feet per day, FID date, EPC contractor, scheduled first-cargo date, and the supporting emissions figure all sit outside the data Grist's feed provides.

What does the project look like to a trade-press desk?

LNG export facilities cool pipeline natural gas to roughly minus 162°C for shipping aboard specially built cryogenic carriers to overseas buyers. The US LNG export build-out has reshaped Gulf Coast gas flows since the late 2010s, with Louisiana hosting the largest concentration of operating terminals. Sabine Pass, Cameron, Plaquemines and Calcasieu Pass already feed cargoes to the international carrier fleet, and more trains sit under construction along the same corridor.

The federal permitting framework anchors each project. FERC authorization under Section 3 of the Natural Gas Act covers siting and operation. EPA greenhouse-gas permitting under the Clean Air Act covers construction and operating emissions. The Louisiana Department of Environmental Quality issues the corresponding state air permit, and the US Coast Guard oversees the marine transit zone. Together, these four authorizations define the regulatory envelope.

What does "most polluting" cover?

The supplied feed does not specify the metric. Trade-press comparisons of LNG emissions intensity typically follow several axes: construction-phase emissions from the liquefaction train, direct facility emissions during operations, full lifecycle greenhouse-gas output including upstream production and shipping, or methane slip along the feed-gas supply chain. Grist's underlying reporting would carry the methodology, the comparator set and the project identifier.

Why this matters for the upstream-to-downstream desk

Each liquefaction train ties back to a specific upstream basin. Haynesville producers in north Louisiana and east Texas sit closest to the Gulf Coast loadout, with Permian and Marcellus gas piped in over longer hauls. Trade-press coverage has tracked how methane intensity along that supply chain travels through to the LNG cargo's lifecycle emissions profile. A "most polluting" designation, if supported by a credible lifecycle analysis, would put the project's buyer pitch under direct pressure from European offtakers operating under the EU methane regulation and the Corporate Sustainability Reporting Directive.

What remains unresolved

The supplied feed contains the headline finding and the source attribution only. Project name, operator, capacity in mtpa or Bcf/d, FID date, EPC contractor, scheduled first-cargo date and the emissions intensity figure supporting the designation all sit outside the supplied feed. Grist's full reporting — not included in the supplied material — would carry each.

Watch items

• Project name and operator once Grist's full reporting is reviewed
• FERC authorization status, including any pending rehearing or remand
• EPA GHG permit conditions and any post-issuance challenge
• Louisiana DEQ air permit record and any contested-case history
• Lifecycle analysis methodology, including the comparator set and the methane-slip assumption
• Construction milestone and first-cargo timing
• Buy-side reaction, particularly from European offtakers under EU methane rules