Why are some regions in CA bad in air quality?
- LA Basin
- Population: 13.9 million
- Registered Vehicles: 8 million
- Source of Pollution: emission from diesel and gasoline vehicles and seaports (Long Beach and Los Angeles)
- High ozone and PM concentrations
- San Diego (SD) County
- Population: 1.4 million
- Source of Pollution: vehicle emissions in SD, port of SD, pollution across the border from Tijuana, Mexico.
- High ozone and PM concentration
- San Joaquin Valley
- Population: 4 million people
- Source of Pollution: diesel and gasoline vehicles, agricultural machineries.
- The surrounding mountains cause the air to be stagnant, which alleviate the pollution problem.
- High ozone and PM concentration
- Inland Empire
- Population: 4 million
- Source of Pollution: pollution carried by the wind from LA county.
- Mountains surrounded in the North and East cause the pollution to be trapped in the region.
- High ozone and secondary organic aerosol (SOA) concentration
