What is the primary effect of disinfecting a well after fecal coliform contamination?

The primary effect of disinfecting a well after fecal coliform contamination is to eliminate bacteria. Fecal coliforms are indicators of potential harmful microbes, often associated with pathogens from fecal matter. The disinfection process, typically involving chlorine or other sanitizing agents, targets these bacteria directly, thereby reducing the risk of waterborne illnesses that can occur when harmful pathogens are present.

Improving taste, increasing pressure, or reducing mineral content are not the main objectives of disinfection. Taste improvement might happen as a secondary effect if certain contaminants are removed, but it's not the goal. Increasing pressure may relate to water system functionality but does not address the contamination. Reducing mineral content pertains to water quality but isn't directly connected to fecal coliform disinfection, which specifically aims to ensure the safety of the water supply by removing biological hazards.