Across
- 5. water from rivers, lakes, and reservoirs
- 6. measure of how clean water is for a specific use
- 8. water located beneath the earth's surface
- 9. adding chlorine to water to kill bacteria and disinfect it.
Down
- 1. level of acidity or alkalinity of water
- 2. study of water movement, distribution, and quality
- 3. method of making water safe for use
- 4. the process of removing particles from water
- 6. area that drains into a particular water body
- 7. water released from clouds as rain, snow, sleet, or hail