Abstract: Iowans (N = 588) were surveyed on their attitudes toward the use of treated sludge on farm lands. Respondents were asked whether they would use sludge on a farm, whether they would serve food from a sludge-treated farm to their families, and whether they would support a ban on the use of sludge. Responses were analyzed with stepwise regression to determine the attitude variance accounted for by various factors, including trust, alienation, antitechnology, knowledge of sludge, knowledge of risk, and demographics. Trust in industry, government, and science figured prominently in decisions of accountability.