There can be coliform bacteria in well water when the well is defective. Drinking water should not contain any presence of coliform bacteria for safety reasons, explains the Vermont Department of Health. If coliform bact... More »

Drinking coliform-contaminated water may cause abdominal cramping, diarrhea, fever and other flu-like and gastrointestinal upset symptoms, according to the Pennsylvania State College of Agriculture. However, drinking wat... More »

Drinking coliform bacteria is potentially fatal for infants, the elderly and individuals who are ill, according to Purdue University Cooperative Extension Service. Fatalities are due to acute intestinal infections caused... More »

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While many types of coliform bacteria present in well water are harmless, dangerous coliform bacteria cause fever, diarrhea, abdominal cramps and other forms of gastrointestinal upset, according to Penn State College of ... More »

To treat well water with bleach, use a pump to clear the well of any dirty or cloudy water, and then add chlorine bleach to the well. This bleach is not found in the supermarket and must obtained from a professional who ... More »

A sulfur smell in well water often indicates bacteria growing in the water. Owners should stop using the water until the problem is corrected, as bacteria is potentially harmful. A musty, earthy or fishy odor sometimes i... More »