This research addresses three related questions: Why has the quality of TGCH Lagoon water deteriorated so
rapidly? How has water pollution impacted on the Lagoon’s shrimp supply chain? How can the water pollution
problem best be managed? To answer these questions, the authors drew on relevant literature in the fields of
institutional economics, supply chain management and environmental economics, conducted an exploratory case
study of the TGCH shrimp supply chain, and consulted key informants in local and provincial government
authorities to help assess policy options. The paper identifies a set of pollution abatement instruments that could be
applied to aquaculture in TGCH Lagoon, and tests them against normative criteria in order to recommend an
appropriate policy.