Across
- 4. removing salt from sea water
- 5. waste water carried in sewers
- 7. store of patable water
- 11. most water used by LIC
- 12. heavy metal that contaminates water
- 13. procees that lowers oxygen level in water
Down
- 1. nutrient from farms that causes algal bloom
- 2. groundwater stored in porous rocks
- 3. process of water seeping into the ground
- 6. non sewage waste water from washing
- 8. water safe to drink
- 9. most water used by HIC
- 10. process to make salt water safe to drink
- 12. source of surface water