ozone

Placer County’s ozone levels drop

  An important piece of the clean-air jigsaw puzzle, ozone levels in Placer and surrounding counties were much lower than normal during the hot days of summer leading into fa ...

Placer air quality dropping, temperature rising

Imagine clamping on the lid of a pressure cooker and then cranking up the heat. That’s what’s in store for the Auburn area over the next few days as a high-pressure system coo ...