What is the minimum treatment usually required for groundwater?

• A. No treatment is required.
• B. Boiling.
• C. Disinfection.
• D. Carbon filtration only.

Answer: (C)

The essential idea is that protecting public health starts with making sure microbes are inactivated before water is consumed. Groundwater can harbor bacteria, viruses, and parasites, and even when it looks clear, contamination can occur. Disinfection uses agents like chlorine, chloramine, or ultraviolet light to kill or inactivate pathogens and to provide a protective residual as water moves through the distribution system. That is why it is typically the minimum treatment required for groundwater supplies. Without disinfection, groundwater can still pose an illness risk. Boiling is a reactive, household-level step and isn’t the standard minimum treatment for a treated water system. Carbon filtration can remove some chemicals and improve taste or odor but does not reliably inactivate microbes on its own. So, disinfection serves as the baseline protection for groundwater drinking water.