Electricity bills for the typical O'ahu residential customer will fall $6.26 this month because of a decline in fuel costs.

Hawaiian Electric Co. said the typical 600-kilowatt-hour bill for O'ahu residential customers will fall to $150.11 from $156.57 in March.

The effective rate for electricity in Honolulu is 23.5 cents per kilowatt hour in April, a decline from 24.57 last month.

Elsewhere in the state:

• Maui customers will see rates fall to 25.62 cents per kilowatt hour in April from March's 28.75 cents. The typical Maui bill will decline to $161.76.

• Big Island residential rates will decline to 32.8 cents from last month's 34.26 cents. The typical bill will be $207.96.

• On Kaua'i, the rate will rise by 1 cent, to 34.33 cents per kilowatt hour. Last month the rate charged by the Kaua'i Island Utility Cooperative was 33.33 cents.

Hawaiian Electric noted that the rate for O'ahu is still below the 32.5 cents per kilowatt hour paid in September 2008, when record-high oil prices resulted in a rise in the cost of fuel used in most of its generators.