The list of names, along with the amount of the credit on the account, will be published in the Ventura County Star on Oct. 11 and Oct. 18.
If the money isn't claimed by Nov. 30, the credit balance will be considered abandoned property and be kept for the general water fund.
A claim can be requested by contacting the city's customer service department at (805) 449-2201 or on the city's website at www.toaks.org.