Environment & Ecology · Environmental Engineering
What does the Chemical Oxygen Demand (COD) test primarily measure in a wastewater sample?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Only the concentration of easily biodegradable organic matter.
- 2The concentration of dissolved oxygen available for aquatic life.
- 3Both biodegradable and non-biodegradable chemically oxidizable organic matter.✓
- 4The absolute population of pathogenic microorganisms present.
Correct answer
Both biodegradable and non-biodegradable chemically oxidizable organic matter.
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