PollutionTracker currently provides a high quality coast-wide baseline dataset. The pollutants detected in Phase 1 samples are a reflection of a variety of sources, including local urban and industrial inputs to the marine environment (e.g., wastewater and effluent discharges, road run-off, stormwater inputs, shipping activities, pesticide use), external inputs (e.g., contaminants carried from other places via oceanic and atmospheric transport), and oceanographic factors (e.g., currents, water depth, bottom substrate).