The water distribution department of urban water and wastewater companies is of natural monopoly characteristic. and requires regulating. The aim of this research is to regulate urban water and wastewater companies in Iran using a price-cap regulation approach to improve their productivity. For this purpose. https://www.roneverhart.com/Gretsch-G5210T-P90-Electromatic-Jet-Two-90-Single-Cut-Electric-Guitar-w-Bigsby-Mako-p23063/