When any questions arise as to the validity of any amount due for water during any one month, the City Clerk or Water Commissioner is authorized to have the meter through which the water flows over which controversy arises, tested, read and investigated. If such meter is found to have been overread or an overcharge made to the consumer, such consumer shall be given credit for the amount of the overcharge on future charges against him for water consumed. (Ord. 358, 2011)