The East Bay Municipal Utility District released a set of names Thursday of excessive water users in the utility district's service area.
Topping the list is San Leandro resident Chris Lang who used 13,601 gallons a day.
Under an ordinance that went into effect July 1, EBMUD officials consider a customer an excessive user if they use more than 59,840 gallons in a roughly 60-day period.
That's an average of about 997 gallons per day, according information provided by the agency.
Discovery Practice Management in Danville used 6,108 gallons per day and Orinda resident Edwin DeSilva used 5,236 gallons per day, according to data provided by EBMUD officials.
DeSilva is the chairman of DeSilva Gates Construction in Dublin.
Four of the top ten excessive water users were from Danville, two were from Alamo and two were from Diablo, according to EBMUD officials.
The list of users represents customers billed from Oct. 10 to 23, but does not include customers who have appealed their violation, EBMUD officials said.
If their appeal is denied, their name will appear on future lists, according to EBMUD officials.