Across
- 2. strengthens teeth for young kids
- 5. improves taste and smell of drinking water
- 8. water passing through a filter
- 11. gets turned into drinking water
- 12. the introduction of harmful materials into the environment.
Down
- 1. scraping off a foamy dirt layer
- 3. H2O
- 4. Toronto’s water source
- 6. used in pools and safe amounts in drinking water
- 7. City of Toronto measures water in units of…
- 9. type of water filter
- 10. short for flocculation