This has been one of the cleaner spring and early summer periods on record for the San Joaquin Valley's air.

Through Tuesday, there have been only 32 bad days. The cleanest warm season I could find was 2005. It had 31 bad days through July 7.

When I make this point, colleagues remind me that the ozone season extends to October here. There is plenty of time for the Valley to reach 119 violations, which is this region's average over the last three years.

And they quote my own reminder: The goal is zero.

True, but it would be interesting if the Valley dips below 100 bad days this year.