Across
- 5. Class B freshwater bodies are intended for this type of use — swimming and bathing
- 8. Layering in deep lakes that affects dissolved oxygen distribution
- 9. The ___ cycle describes how water moves through the Earth
- 11. Water utility mandated under RA 9275 to provide sewerage facilities in Metro Manila
- 13. Pollution that originates from a single identifiable location
- 15. Intended beneficial use of Class D freshwater bodies, the lowest classification
- 16. A protected land area that drains into a water body; Class AA waters come from this
- 18. Chemical parameter with a limit of 0.5 mg/L under Class A in DAO 2016-08
- 22. Increasing concentration of toxins up the food chain
- 23. Rain or snow that affects turbidity and total suspended solids in water
Down
- 1. Agency that issues advisories for red tide in the Philippines
- 2. The specific variety responsible for red tide in the Philippines
- 3. Wastewater containing suspended solids, bacteria, and organic compounds
- 4. Frozen freshwater mass making up 2.15% of the non-ocean hydrosphere
- 6. Eukaryotic protist with flagella that causes red tide
- 7. Blue-green algae that thrives in warm, nutrient-rich water
- 10. Heavy metal whose limit was raised from 0.04 to 1.0 mg/L under DAO 2021-19 for Class C waters
- 12. Largest reservoir of water on Earth, comprising 97.2% of the hydrosphere
- 14. Process where excess nutrients trigger ecosystem collapse
- 17. Source accounting for 33% of water pollution in the Philippines
- 19. The largest lake in the Philippines
- 20. Wastewater discharged from industrial or municipal sources
- 21. The largest lake in the Philippines (de Bay)