Quote:
Originally Posted by florida joehttp:///forum/thread/383982/drinking-water#post_3362143
The drinking water at your local supermarkets is municipal water which has been further filtered, now depending how well their filtration system is working you need to determine by TDS testing as stated. The other water you can obtain at the stores is natural spring water which is not filtered municipal water but rather derives from natural springs,
The RO water from your home unit starts out as municipal drinking water as well. Just check the label if you are buying jugs. If it says RO/DI then you shouldn't have an issue with it. But yes, TDS is something that needs to be checked from any water when you are using something new.