A cold glass of water is great on a hot day. Fresh water is clear. Not all clear water is pure, though. Some water has hidden surprises in it. These surprises are not the good kind that you get on your birthday!
What kinds of surprises have been found in the water? Scientists have found traces of drugs. A trace is a small amount. A news agency called the Associated Press did a study on drinking water. They studied water in the United States. They studied samples from California and New Jersey. They studied samples from Michigan and Kentucky. They did their study for five months. These water supplies served millions of people.
Have you ever taken pills when you were sick? Some people think that when they take a pill, all of it gets absorbed by their bodies. However, this is not true. The drugs end up in the water system. Sometimes people flush unused medicine down the toilet. Water treatment systems are unable to remove the drugs.