Water pollution

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Across
  1. 4. things that damage the quality of air, water, and land
  2. 5. identifiable sources of pollution
  3. 7. water that occurs below the surface of Earth
Down
  1. 1. an area of land that drains all the streams and rainfall to a common outlet
  2. 2. the contamination of water or air that does not originate from a single discrete source
  3. 3. a body of porous rock or sediment saturated with groundwater
  4. 6. a hole drilled into the ground to access water