This research adopts a mixed-method approach, including: (1) Exploratory interviews, the codes and themes of which facilitated the researcher's understanding of the context surrounding the occurrence of illegal dumping; (2) Questionnaire survey to (a) test the hypothesized relationships in the conceptual model, and (b) explore certain phenomenon concerning the industrial context uncovered from the exploratory interviews; and (3) Supplementary interviews with some questionnaire respondents to explain findings from the questionnaire survey.