A disease that cannot be contracted by drinking contaminated water is:

Malaria is a disease that is transmitted through the bites of infected female Anopheles mosquitoes, rather than through contaminated water. This means that drinking water that may be contaminated does not pose a risk for contracting malaria.

In contrast, the other diseases listed are all waterborne. Hepatitis A, Giardiasis, and Cholera can be contracted through ingesting water contaminated with fecal matter or pathogens. Therefore, recognizing the transmission pathways of these diseases is critical in understanding how to prevent their spread, especially in areas where water quality is a concern. Malaria emphasizes the importance of understanding different vectors for diseases, as it highlights that not all health risks are associated with water contamination.