Recently American attention has focused on the problems of pollution and environmental protection. Focusing on the Four Corners Interstate Air Quality Control Region, this study determined which socioeconomic characteristics were associated with concern for environmental quality as measured by willingness to pay for pollution abatement. Sample sites were determined by weighing four pollution concentration zones. Interviews were conducted during the 1972 summer and January 1973 with 747 reservation and nonreservation residents and out-of-region recreationists. Separate questionnaires, designed for each subpopulation, were used to determine willingness to pay via a series of bidding games. To ensure that the means of financing was not a barrier to a respondent's willingness to pay and since no bidding game was appropriate for all, five games were constructed--a sales tax increase; an additional charge to the electric bill; a monthly charge; an increase to the user's fee; or a change in laws. Responses were analyzed by stepwise multiple regression. Some findings were: (1) few consistent relationships existed between concern for environment and socioeconomic characteristics (age, occupation, income, ethnicity, and organizational participation); and (2) a clear majority were willing to pay for pollution abatement. (NQ)