| Down |
| 2. | Largest reservoir in the U.S. |
| 3. | Land area from which water drains |
| 4. | Moisture in the air that condenses on surfaces |
| 5. | Wetland that accumulates peat, a deposit of dead plant material |
| 7. | The sum or all inorganic and particulate material (Acronym) |
| 8. | Maj. cause of water loss |
| 9. | Indicator bacteria (2 Words) |
| 10. | Typical agrochemical |
| 12. | Erupting thermal spring |
| 14. | Irrigation ditch in Mexico? |
| 17. | River famously dyed green on St. Patrick's Day |
| 19. | Painful precipitation? |
| 20. | American agency that monitors climate and weather |
| 21. | Of or pertaining to the bottom of a water body |
| 22. | Relating to stream banks |
| 25. | To save water |
| 27. | Relating to marshes or wetlands |
| 28. | Relating to lake shores |
| 32. | Amount of water that can be drawn from a source |
| 33. | Water safe for consumption |
| 34. | Clouds that form at the Earth's surface |
| 35. | Wetland fed by mineral-rich surface water or groundwater |
| 37. | Bacterial conversion of organic matter to CH4, CO2 and other molecules |
| 39. | Water treatment method via boiling |
| 41. | Greek deity of seas and waters |
| 42. | Rules for reducing pollution (Acronym) |
| 45. | Water high in calcium |
| 46. | American agency that monitors streams |
| 48. | Water discharged after use |
| 49. | Hindu goddess of the Ganges River |
| 51. | Where water emerges from the ground |
| 52. | Alluvial deposit by a stream entering a body of water |