Which is the smoggiest place in the nation? LA or the San Joaquin Valley?

Depends on how you view it, but let's look at the number of ozone violations over the last 10 years.

Under the new federal standard, the Valley has 1,365 bad days dating back to 1998.

South Coast Air Basin, or the LA area, has 1,212.

There is another way to look at this. LA has higher concentrations of ozone. But the Valley has a longer ozone season, sometimes getting violations in October or even November.

The story so far this year: LA, 96 violations; Valley, 84.