LA Port Hits Record-Low Emissions Per Container on 10.2m TEU Year

The Port of Los Angeles handled nearly 10.2 million TEUs in 2025 while posting its lowest emissions per container on record, according to the port's newly released 2025 Inventory of Air Emissions. Every major pollutant declined year on year: diesel particulate matter (DPM) fell 2%, nitrogen oxides (NOx) dropped 4%, sulfur oxides (SOx) fell 5%, and greenhouse gases (GHGs) decreased 3% against 2024.

The NOx figure marks the lowest annual total for that pollutant since the port began tracking emissions in 2005. The result extends a two-decade trend of reductions achieved alongside steadily growing cargo volumes — a combination the port has long positioned as proof that throughput and decarbonization are not mutually exclusive.

How deep do the cumulative cuts run?

Measured against the 2005 baseline, the port has cut DPM by 90%, NOx by 72%, SOx by 98% and GHGs by 16%, all while container volumes increased 37%. Put simply, the port now moves roughly a third more boxes than it did twenty years ago while emitting a fraction of the local air pollution it once did.

Progress since the 2017 update to the Clean Air Action Plan (CAAP) shows the trend holding through the recent era: DPM, NOx, SOx and GHGs are down 15%, 38%, 28% and 9% respectively since that revision.

Which source categories drove the 2025 gains?

The reductions were broad-based across the port's emission sources, with trucks and cargo-handling equipment leading the way.

• Trucks: DPM and NOx fell 16% and 25% in a single year; since 2005, truck DPM, NOx and SOx are down 98%, 94% and 97%.
• Cargo-handling equipment: Electric units increased 20% in the year, and zero-emission equipment now makes up 14% of the total fleet, with ten times as many hybrid units as in 2017. The category has delivered DPM, NOx and SOx reductions of 83%, 87% and 84% since 2005.
• Harbor craft: Tugs, barges, ferries and workboats continue to clean up, with 55% of the fleet now meeting Tier 3 and Tier 4 emissions standards — up from zero percent in 2005.
• Ships: Ocean-going vessels benefited from cleaner fuels, increased shore power use and a 34% reduction in vessel arrivals since 2005.
• Rail: Emissions declined modestly, with DPM, NOx and SOx down 45%, 52% and 99% since 2005, driven by cleaner fuels and newer locomotives.

What do port leaders say?

Harbor Commission President Beatrice Hsu described the results as "a powerful reminder" of the progress made over 20 years of the Clean Air Action Plan, while reaffirming the port's commitment to its zero-emissions goal.

Executive Director Gene Seroka credited years of investment, innovation and cross-industry collaboration for demonstrating that high cargo volumes and continued emission reductions can be achieved simultaneously.

Why does it matter for shippers and carriers?

For carriers and terminal operators calling at San Pedro Bay, the numbers signal that compliance expectations at the US's largest container port will keep tightening rather than easing. Trucking operators serving the port face a fleet already 98% cleaner on particulate matter than in 2005, a benchmark set by CAAP-driven turnover toward newer, and increasingly zero-emission, tractors.

For shippers and forwarders, the port's trajectory feeds into supply-chain sustainability reporting: cargo routed through Los Angeles can now be tied to a measurable, two-decade emissions decline per box, a data point increasingly relevant as Scope 3 accounting spreads through procurement contracts.

The 2025 inventory also lands as the port pushes toward the zero-emissions goal reaffirmed by the Harbor Commission, meaning further pressure on shore power utilization, zero-emission cargo-handling fleets and Tier 3/4 harbor craft adoption — with the next round of annual inventories expected to show whether the 10-million-TEU-plus era can sustain per-container declines.