Across
- 2. semi-solid slurry
- 3. Organic gas
- 6. Bacteria that depend on air
- 7. infusion of air into water
- 8. water containing contaminants
- 10. Bacteria that does not depend on air
- 11. the provision of drainage by sewers
Down
- 1. waste water and excrement conveyed in sewers
- 4. conditions relating to public health
- 5. Makes something less pure or poisonous
- 9. an underground conduit for carrying off drainage water and waste matter