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July 11, 2008

arrowWorst ozone peak in six years

A reader just called and asked how bad the highest one-hour ozone peak was on Wednesday -- which was a smoky, smoggy mess. It was the highest ozone peak in six years, according to the California Air Resources Board.

The state figures show the highest readings were in the Fresno-Clovis area. The Fresno reading was 157 parts per billion for one hour. It occurred between 1 and 2 p.m.

The EPA no longer enforces the one-hour peak standard, instead using the more stringent eight-hour averages. But the old one-hour health standard was 125 parts per billion.

Six years ago on July 10, Parlier had a reading of 164 for one hour.



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