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