Nonpoint-source pollution (NPSP) poses a special challenge to society's ability to manage its collective environmental good - especially surface and groundwater quality. Since there is no `point', such as an outfall pipe, from which the pollution is being discharged and can be measured,...

1. Introduction to the problem -- 2. Current efforts to induce continuous compliance -- 3. Excursions into law and technology -- 4. Economic models of monitoring and enforcement -- 5. Statistical background -- 6. A statistical quality control model -- 7. Lessons from game theory approaches -- 8....