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