Across
- 4. after the treatment of water
- 7. treated sewage is major source of groundwater pollution
- 8. is allowed to flow into water bodies
- 9. proper drainage system
- 10. easily blocked by
Down
- 1. contamination of drinking water can happen in
- 2. grow and multiply stagnant wastewater
- 3. sewage may collect
- 5. breeding are encountered in open drains
- 6. decay of organic waste present in waste water leads to