Hello! We are a 10th grade Biology from Hamilton High School located in Milwaukee, Wisconsin (that is at 43 degrees north latitude and 88 degrees west longitude). We are studying the effects of humans on our natural ecosystems and decided that we would test our major river running through our city. We hypothesize that the water is going to be very polluted due to heavy recreation use, factory and sewage runoff, and general littering that goes on in or around the river. We hope that our results give you some helpful information from the midwest region of the United States!!