- Shallow hand pumps draw water from relatively shallow aquifers, which are susceptible to contamination from surface sources like sewage, agricultural runoff, or open defecation. - Cholera and Typhoid are bacterial diseases commonly spread through water contaminated with fecal matter. - Jaundice (specifically Hepatitis A or E) can also be spread through water contaminated with fecal matter. - Fluorosis is caused by excessive ingestion of fluoride, typically from drinking water with naturally high levels of fluoride. This is a geological issue related to the mineral composition of the aquifer, not a result of contamination from surface pathogens common in shallow, poorly protected wells.