6.1. Turbidity as an Indicator

Try these first

1. 1.

   Define turbidity in your own words.

   Hint

   Think about what makes water clear or cloudy.

2. 2.

   What does CFU stand for?

   Hint

   What unit do we use to estimate bacterial populations?

3. 3.

   What does high turbidity in water usually indicate?

   • Clear water
   • Presence of microorganisms
   • High mineral content

   Hint

   Remember that turbidity is a measure of cloudiness.

4. 4.

   True or False: Non-viable microorganisms can still cause diseases.

   • True
   • False

   Hint

   Think about the definition of non-viable.

5. 5.

   A water sample shows a turbidity level of 12 NTU and a culture plate reveals 45 CFUs at 24 hours. Discuss the implications and potential health risks based on these results.

   Hint

   Consider what turbidity indicates regarding microbial presence.

6. 6.

   A student proposes using turbidity as the only measure of water quality. Critique this approach, considering the limitations of turbidity as an indicator.

   Hint

   Analyze both sides of the argument about relying solely on turbidity.