A 20-day streak of increases in the average price of a gallon of self-serve regular gasoline in Los Angeles County ended today with a decrease of one-tenth of a cent to $3.458, a day after a similar 20-day streak ended in Orange County.

However, gas prices continued rising in Riverside County.

The Orange County average price was unchanged today, remaining at $3.428, one day after a 20-day streak of increases ended when it was unchanged.

The Orange County average price is 1.9 cents more than one week ago, 22.1 cents higher than one month ago and 51.3 cents greater than one year ago. It has risen 31.2 cents since the start of the year.

The average price in Los Angeles County rose 21.2 cents during the streak, including four-tenths of a cent on Wednesday, to its highest amount since Sept. 8, 2015, according to figures from the AAA and Oil Price Information Service.

The average price in LA County is 2.5 cents more than one week ago, 22 cents higher than one month ago and 54.6 cents greater than one year ago. It has risen 30.8 cents since the start of the year.

The streak in rising gas prices didn’t end today in Riverside County, where the average price of a gallon of self-serve regular gasoline rose one-tenth of a cent today to $3.39, its highest amount since Sept. 6, 2015.

The average price in Riverside County has risen 21 consecutive days, increasing 20.9 cents, including six-tenths of a cent on Wednesday, according to figures from the AAA and Oil Price Information Service. It is 3.2 cents more than one week ago, 23.4 cents higher than one month ago and 54.5 cents greater than one year ago. The average price has risen 31.7 cents since the start of the year.