Florida Drinking Water Operator "B" Practice Test

What issue is caused by low pH and iron bacteria in the water?

1. Blue water problems

2. Green water problems

3. Clear water problems

4. Red water problems

The correct answer is: Red water problems

Low pH levels combined with the presence of iron bacteria can result in red water problems. Iron bacteria thrive in environments where iron is present in significant quantities, and they release iron oxidizing agents that can cause the water to take on a reddish tint. This discoloration occurs due to the iron that is oxidized and precipitated out of the water, leading to aesthetic issues which may affect consumer confidence in water quality. Additionally, the acidic conditions brought about by low pH can further exacerbate the leaching of iron from the distribution system or natural sources, increasing the likelihood of red water issues. Red water does not typically indicate a health hazard but can create challenges regarding public perception and the perceived quality of drinking water. The other options relate to different types of water quality issues that have distinct causes, such as blue, green, or clear water problems, which do not directly result from the combination of low pH and iron bacteria.