Humber/Ontario Real Estate Course 4 Exam Practice

If contamination is found in a water well on the property, what is the most likely cause?

1. The well is drilled with a small diameter piping

2. The drainage system is causing surface water contamination to leak into the well

3. The well's openings from the outside are sealed

4. The well was incorrectly situated

5. The well's depth exceeds required standards

6. The well is naturally susceptible to contamination

The correct answer is: The drainage system is causing surface water contamination to leak into the well

The correct answer identifies the likelihood that a drainage system could lead to surface water contamination leaking into the well. This scenario is particularly plausible because drainage systems can direct surface runoff and any associated pollutants directly toward a water source if not managed properly. If surface water, which may contain environmental contaminants, enters the well due to an inadequate drainage design or flaws in the system, this can lead to significant health risks and water quality issues. Proper well construction and placement should ideally mitigate such risks, making awareness of drainage systems and their interactions with water wells crucial in assessing potential contamination sources. Other causes listed may suggest various issues, such as construction standards or natural factors, but they do not directly address the commonality of surface water entering wells through concerning drainage practices.