The use of water polluted by municipal and industrial waste for irrigating crops grown in Oguzeli (Gaziantep) creates significant problems in terms of crop and soil quality, human health, and the environment. The behavioral patterns of farmers is believed to be an important factor in solving environmental problems. In this paper, data were analyzed by using the contingent valuation technique, and a functional relationship based on the willingness to pay (WTP) of pollutees was established. Variance analysis and regression models provided support for the diminishing marginal WTP theory. Moreover, the contribution ratio, the area given over to nonirrigated dry land, and income from animal and dairy products are statistically meaningful variables in addition to total income and the area given over to vegetable production.