Definition: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Input: Narrator:  In the United States , beaches are closed if the fecal coliform count reaches 200 units per 100mL of water . The Ganges River has over _ one million _ per 100mL of water , making it a highway of viruses and bacteria .

count