science crossword

1. Public water suppliers process ______ gallons of water per day for domestic and public use.
3. More than _______households drink from their own private wells and are responsible for treating and pumping the water themselves.
4. ______ of water on earth is salt water.
5. _____ percent of Americans rely on lakes, rivers, and streams as their source of drinking water. The other 39 percent rely on ground water -- water located underground in aquifers and wells.
6. Approximately ______ of pipelines and aqueducts carry water in the United States and Canada. That's enough to circle the earth 40 times.
7. Only _____ percent of the earth's water is available for drinking water.
8. The average daily requirement for fresh water in the United States is about _______ gallons a day, with about 300 billion gallons used as untreated water and for agriculture and other commercial purposes.
10. There are more than ______ individual water systems providing water to the public in the United States.
11. most common substance.
12. You can survive about a ______ without food, but only five to seven days without water
13. About _____ of the human body is water.

1. americans dumped how much motor oil into the ocean?
2. In 1974, Congress passed the _________ to ensure that drinking water is safe for consumption. The Act requires public water systems to monitor and treat drinking water for safety.
3. Industries released ________ pounds of toxic chemicals into waterways in 1990 alone
9. About _______ water wells are drilled each year in the United States for domestic, farming, commercial, and water testing purposes.