All consumers of water outside the city, who receive water from the municipal water system shall pay for such water at a rate equal to the base installment amount, and double the gallonage rate, as established by resolution of the mayor and board of aldermen. (Code 1953, § 21.31; 1961 Supp., § 21.31; Ord. No. G-00-36 § 1, 9-14-00; Ord. No. G-98-3 § 1, 2-19-98)