You shouldn't need the chemical analysis of the water if your "very well respected soap maker" really knew her stuff. Distilled water and spring water are not remotely the same things.
Water that comes from springs, wells, lakes, and rivers will always contain "hard water" ions. These ions, principally magnesium and calcium, react with potassium or sodium soaps to form insoluble calcium and magnesium soaps. These insoluble soaps are what we call "hard water scum", and they will cause cloudiness in LS if one uses this kind of water for making liquid soap.
The only types of water that will have zero or very low levels of dissolved minerals are distilled, deionized, and reverse osmosis water, as well as water collected directly from the air -- rainwater being a prime example.
Softened water is another possibility for liquid soapmaking, because some amount of the hard-water ions have been replaced by sodium ions in softened water. Whether softened water will work or not depends on how "soft" the water is -- in other words, how low the concentrations of calcium and magnesium ions are in the softened water.
If the "expert" you are following is actually using softened water, then her terminology is incorrect and misleading, because soft water is by definition not "spring" water. Since you have mentioned you also follow Failor, you can confirm my advice by referring to her Making Natural Liquid Soaps, copyright 2000, page 10.
Water that comes from springs, wells, lakes, and rivers will always contain "hard water" ions. These ions, principally magnesium and calcium, react with potassium or sodium soaps to form insoluble calcium and magnesium soaps. These insoluble soaps are what we call "hard water scum", and they will cause cloudiness in LS if one uses this kind of water for making liquid soap.
The only types of water that will have zero or very low levels of dissolved minerals are distilled, deionized, and reverse osmosis water, as well as water collected directly from the air -- rainwater being a prime example.
Softened water is another possibility for liquid soapmaking, because some amount of the hard-water ions have been replaced by sodium ions in softened water. Whether softened water will work or not depends on how "soft" the water is -- in other words, how low the concentrations of calcium and magnesium ions are in the softened water.
If the "expert" you are following is actually using softened water, then her terminology is incorrect and misleading, because soft water is by definition not "spring" water. Since you have mentioned you also follow Failor, you can confirm my advice by referring to her Making Natural Liquid Soaps, copyright 2000, page 10.