Matching Pairs Water Pollution VocabularyOnline version Matching vocabulary. by Anna Rowe 1 Toxic Pollution 2 Nutrient Pollution 3 Water Pollution 4 Sediment Pollution 5 Bacterial Pollution the presence of excess nutrients in the water. the presence of toxic substances in water. The introduction of harmful substances into the water. the presence of excessive sediments such as silt and clay in water. the presence of harmful bacteria in water supplies.