With policy tools such as anti-displacement measures, existing community members can remain in and strengthen their neighborhoods and networks while accepting new residents through more compact, mixed-use development

Percentage of Days Exceeding State 8-hours Ozone Standard by Receptor Area

  • Over the past 13 years, ozone exceedances have fluctuated from year-to-year across LA County. 
  • East San Gabriel Valley and East San Fernando Valley have had the greatest increases in Ozone exceedances from 2005-2013 
The following sub-regions had less than 3% of days exceeding the State 8-Hours Ozone Standard and were therefore excluded from the above figure: Northwest Coastal LA County, Southwest Coastal LA County, South Coastal LA County 1 and 3 and South Central LA County.

Percentage of Samples Exceeding State 24-hour PM10 Standard

  • Drier, arid inland areas of LA County have higher exceedances.
  • Both PM10 and PM2.5 exceedances decreased from 2008-2010. 
  • Data unavailable for Northwest Coastal LA County, West San Fernando Valley, Pomona/Walnut Valley, South San Gabriel Valley and South Central LA County.
Data unavailable for Northwest Coastal LA County, West San Fernando Valley, Pomona/Walnut Valley, South San Gabriel Valley and South Central LA County.

Percentage of Samples Exceeding Federal 24-hour PM2.5 Standard

  • Drier, arid inland areas of LA County have higher exceedances. 
  • Both PM10 and PM2.5 exceedances decreased from 2008-2010. 
Data unavailable for Northwest Coastal LA County, Southwest Coastal LA County 2, South Coastal LA County 3, East San Gabriel Valley 2, Pomona/Walnut Valley, Santa Clarita Valley and Lancaster - Division St.

Stationary Source Metal Emissions (2005-2017)

  • The amounts (mass) of point source and fugitive air emissions for a number of metals (copper, lead, nickel, chromium, and antimony) all decreased markedly around 2008-2009. Nickel and copper emissions began increasing again around 2015-2016.
  • The mass of manganese and manganese compounds emitted in 2014 was revised due to an error in TRI data for the year (originally reported ~46,000 pounds of point source and fugitive air emissions).
  • Antimony and selenium emissions decreased after 2008 and have not rebounded since.
  • The most prolific emitters of lead are concentrated in south LA County near the Port of Los Angeles. The Tesoro Wilmington Calciner is the single most prolific emitter on the mainland (93.8 pounds). The Navy also reported emitting 97.8 pounds of lead off the coast of San Clemente Island.
  • Lockheed Martin is the most prolific producer of chromium air emissions in LA County.

MATES IV Cancer Risk per One Million Residents with Census Tracts in the bottom 10% Median Household Income (2012-2013)

  • MATES does not provide information about cancer risk from air pollution in the Antelope Valley.
  • Areas with the lowest calculated risk are in the Sandberg/ Gorman area, and on Catalina Island.
  • The areas with the highest calculated risk are near the Port of LA and Port of Long Beach.
  • MATES IV found average air toxics risk decrease of 65% relative to MATES III (conducted 2004-2006).
  • Lower income areas typically have medium to high risk of cancer.