Water and Waste Water Management Crossword

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Across
  1. 1. solid matter produced by sewage treatment
  2. 3. microorganisms that can cause diseases
  3. 7. stagnant water in blocked drains is a good breeding place
  4. 8. matter discharged into water bodies uses up substantial oxygen dissolved in water
  5. 9. when the drainage pipe and drinking pipe are close and the leak can make the water
Down
  1. 2. wasterwater contains microorganisms
  2. 4. new method use red worm to treat human excreta
  3. 5. waste water from houses, industries that runs over land containing waste matter
  4. 6. bathing, flushing toilet and washing are some ways which produce