Air Quality on Demand

Monitoring air pollution in real time is an essential part of the Port's comprehensive program to improve the environment and quality of life for all who live and work in the harbor area.


The Port of Los Angeles has been monitoring levels of key pollutants since 2005. The Port also tracks temperature, wind and other weather-related data. The benefits of monitoring air quality in the community include:

  • Reporting air quality 24/7
  • Tracking historical trends
  • Verifying the progress of Port pollution reduction measures
  • Comparing local air quality with state and federal clean air standards


Pinpointing What’s in the Air

The San Pedro and Wilmington communities are home to more than 140,000 people. Operating within both communities, the Port of Los Angeles has been tracking air quality since 2005 and collecting real-time data since 2008. The main objective of the air monitoring program is to estimate ambient levels of diesel particulate matter in proximity to the Port that are due to Port operational activities.

The Port of Los Angeles has four air monitoring stations which are strategically located throughout the Port. The stations are located at:

    • Outer Harbor area at Berth 47
    • Terminal Island Treatment Plant
    • San Pedro Community (near the Battleship Iowa)
    • Wilmington Community (Saints Peter & Paul Elementary School)

Each of the Port’s air quality stations has a weather monitoring system tracking wind and temperature patterns. The Port uses filters to collect samples of particulates for detailed chemical analysis, including determining levels of:

  • Ambient elemental carbon as a surrogate for diesel particulate matter (DPM)
  • Particulate matter (PM)
    • Fine PM that is less than 2.5 micrometers in diameter (PM2.5)
    • PM that is less than 10 micrometers in diameter (PM10)
  • Meteorological data
  • Four gaseous criteria air pollutants
    • Ozone (O3)
    • Nitrogen Dioxide (NO2)
    • Sulfur Dioxide (SO2)
    • Carbon Monoxide (CO)
  • Ultrafine Particle Counts (UFP)

Real-Time Monitoring

Real-time air quality information is available 24/7 and can be viewed here. Visitors can find station locations, real-time data, a summary of the previous day’s air quality and weather data, pollutant levels by calendar day, short-term and long-term historical trends and reports summarizing the data.

The cumulative results of the Air Quality Monitoring program support the findings of the annual Inventory of Air Emissions that show the Port has made significant progress in improving air quality through its pollution reduction programs. It also shows the communities of San Pedro and Wilmington meet state and federal clean air attainment standards, with the exception of the state standard for concentrations of particulate matter the size of a speck of dust.