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State air pollution regulators said Monday that California's air quality is not expected to worsen appreciably after the governor ordered the release of a dirtier blend of gasoline to help slash record-high pump prices.

The California Air Resources Board issued a regulatory advisory a day earlier after Gov. Jerry Brown ordered them to allow so-called "winter-blend" gasoline to be sold in California earlier than usual to increase supply.

AAA said the average price for a gallon of regular hit $4.668 Monday in California — the highest price in the nation and an all-time high for the Golden State. Analysts said the spike has been driven by refinery disruptions and corrosion issues in an important pipeline.

Read more at the Associated Press