Environment & Ecology · Environmental Engineering
What does the presence of the E. coli index primarily indicate in drinking water samples?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Total dissolved solids and hardness
- 2pH and acidity level
- 3Fecal contamination and presence of pathogens✓
- 4Residual chlorine concentration
Correct answer
Fecal contamination and presence of pathogens
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