High Levels of Toxic Particles in Southern California Air Pose Health Risks
The Southern California Air Quality Study in 1987 looked at air pollution in Los Angeles. They measured different types of particles in the air, like PM2.5 and PM10. PM2.5 made up a big part of PM10. In the fall, PM10 levels were highest, with more nitrate and sulfate. In the summer, sulfate levels were higher. Different areas had different types of particles in the air, like soil-related or marine-related elements. During the day, nitrate and ammonium levels were lower than at night. Sulfur dioxide was highest near oil refineries, and ammonia was highest near dairies.