Join Date: Aug 2006
Location: San Francisco Bay Area
Submit Photo: 5
Photo Submissions 19 Times in 13 Posts
We did figure out that a lot of the small shops that say they sell filtered water have RO water there. The question is how often they change their filters & membranes. We would sometimes buy a bit and then test it ourselves to see if it was pure enough. Sometimes it was and sometimes we were basically buying filtered tap water.