1.   Thanks to wind drift, the highest ozone levels are often found in country areas.

2.   The highest ozone reading would continue to come from Livermore, where ocean breezes push boiling chemical clouds from the congested Bay Area into the Livermore Valley.

3.   The industrial zone in the northwest of this sprawling city suffered the highest ozone contamination levels, causing nausea, dizzy spells, vomiting and breathing difficulties.