When measured by average net worth and household income, the area's wealthiest ZIP codes are spread across all of Los Angeles County, from Malibu down the Pacific coast to Rancho Palos Verdes and ...

That dubious distinction went to Fresno. But three of the 10 most pollution-heavy ZIP codes were in Los Angeles County. The other seven, including Fresno, are in the San Joaquin Valley ...

In fact, only 35 of the zip codes included on the list (less than 30 percent) are in states outside of California. Los Angeles was the best represented county on the list, in both California and ...