Water

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Across
  1. 7. Rock or soil allows water to flow through
  2. 8. A disease causing agent
  3. 11. Water drained or flushed down pipes
  4. 12. Water above the surface of the land,
Down
  1. 1. Pollution from a specific site
  2. 2. Accumilation of pollutants at the food chain
  3. 3. A river and it's tributaries
  4. 4. Removing salt from ocean water
  5. 5. Artificial lake used for water supply
  6. 6. Water that fills cracks and spaces
  7. 9. Underground formation for groundwater
  8. 10. Suitable for drinking