This article uses a case study approach to examine the processes and consequences of pollution enforcement in an industrial township in rural Sichuan. China's national pollution emissions standards are relatively strict, but enforcement is the responsibility of some 2,500 Environmental Protection Bureaus (EPBs) within municipal and county governments. EPB officials exercise considerable discretion in prioritizing and carrying out enforcement activities, but exactly what factors influence regulatory behaviour within EPBs is poorly understood. Data for the article are drawn from interviews with EBP officials, township government officials, industrial managers and local residents, as well as a review of township and district financial records and pollution enforcement records. In this case study, EPB enforcement priorities and actions were guided by State Council directives and State Environmental Protection Administration policy, but citizen complaints and media exposure regarding polluting factories also played a key role, and action culminated in the forced closure of township factories. The article uses political ecology as an analytical framework for understanding how pollution enforcement is shaped by the competing values, goals and priorities within the EPB and the administrative unit in which it operates. This is crucial in China, where the decentralized nature of environmental oversight requires an examination of both policy formulation and implementation. The implications of pollution enforcement on rural enterprises for ecological health, fiscal revenue and rural development are also discussed.