Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

Fecal coliform organisms found in water supplies indicate what concern?

1. Water is safe to drink

2. Water supply is contaminated, harmful bacteria may be present

3. Water has high mineral content

4. Water is suitable for food processing

The correct answer is: Water supply is contaminated, harmful bacteria may be present

Fecal coliform organisms serve as indicators of the presence of potentially harmful bacteria and other pathogens. Their detection in water supplies raises significant health concerns because these organisms typically originate from the intestinal tracts of warm-blooded animals, including humans, and signal that the water may be contaminated with fecal matter. This contamination implies that disease-causing microorganisms could also be present, potentially leading to gastrointestinal illnesses and other health risks if ingested. Understanding the implications of fecal coliform presence is crucial in water quality management. Reliable findings of fecal coliform in drinking water can trigger monitoring and remedial actions to ensure public safety and compliance with environmental health standards. This is particularly relevant in the context of the TCEQ's regulatory framework for ensuring safe drinking water. The other options do not accurately convey the significance of fecal coliform organisms. While high mineral content refers to different water quality issues, and suitability for food processing relates to entirely different criteria, the presence of fecal coliform directly suggests contamination that poses health risks. Thus, identifying this concern is fundamental for protecting public health and maintaining safe drinking water.