Water pollution

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Across
  1. 3. Discharge of liquid waste from a factory
  2. 5. Rain with a higher than normal acid range
  3. 6. Water that is suitable for consumption
  4. 7. Water that flows off a field or paved area
  5. 9. Waste water transported in sewers
Down
  1. 1. Solid material that is being transported by water
  2. 2. The process of cleaning polluted water
  3. 4. The surrounding land area that drains into a water body
  4. 5. An underground layer that stores water below the surface.
  5. 8. One of India's most polluted rivers