We purchased a test kit for my daughter, we are having a hard time finding the water standards for testing pH, alkalinity, water hardness, free chlorine and total chlorine.
I see you have standards on your site for some items but these are not included and with kit it does not say or include the safe range of all of these in the water and we need to find out if not in safe range and what could be the side affects.
Many of the references on water standards are national levels from EPA. However, water represents the local and regional geology and climate plus any effects from human habitation. For this reason, you need to relate your study to local water quality results when applicable. I suggest you contact your local water supply district to obtain copies of the local water quality data. You might also look to your state agency in charge of drinking water for more information.