Tuesday Trivia – Answer for September 18

It’s now 1 week past World Water Monitoring Day – tell us what you did to celebrate in the comments below:

For those who took last week’s quiz to measure their water quality knowledge, read on. The questions and answers are below:


  1. Water that has traveled underground naturally gets filtered, so it’s guaranteed to be pure
  2. To determine whether water should be tested using special chemical or biological tests, you should determine the water’s hardness level and measure that against the time of year you’re taking your measurements
  3. Measuring the turbidity of the water can help determine the bacteriological safety of the water
  4. Getting water from a well that’s located downhill from a septic tank is more likely to suffer from water pollution
  5. When determining the safety of a water source, the single most important factor to test for is the presence of disease-producing organisms
  6. The U.S. EPA has a specific definition of “good water quality”
  7. Running water purifies itself to a quality level that meets “drinking water quality” guidelines after it has flowed continuously over a specified distance


  1. False
  2. False – the best indication of whether water should be chemically and/or bacteriologically tested is to do what’s called a sanitary survey to determine potential sources of contamination near, in or around the original water supply. This would be a landfill or a gas station near a water source, for example
  3. False – measuring the water’s turbidity level does not indicate whether bacteria or microorganisms are present
  4. True
  5. True
  6. False – this is a tricky one because the EPA defines water quality per the requirements outlined in the Safe Drinking Water Act (SDWA); however, this is an objective, non-biased definition that does not take into account the water’s end usage – this is where properties like odor, color and taste would be considered. So “water quality” and “good quality water” are defined differently and the EPA does not define “good quality water”
  7. False

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