Growing up in Austin, Texas, I would have loved to have water for my plants that was only as alkaline as San Diego’s water. The water that arrives in central Texas cities like Austin and San Antonio has flowed through the Hill Country to the west or percolated through them into the many aquifers in that area, and those hills are nothing but limestone, and lots of it. I never knew what the “official” pH of Austin was, just knew that it was pretty high. So I just looked it up and the raw water has a pH of about 8.1 while the treated water at the tap has a pH of 9.7! Decided to check out Pasadena’s water supply, which I knew was a mix of water from local aquifers and local mountain streams plus water from the huge MWD that supplies water to a lot of the Los Angeles metropolitan area and gets that water from the Colorado River and from northern California. It turns out that 40% comes from local sources and 60% comes from the MWD, although they’re trying to increase the percentage of local water. And the pH of those two sources are 6.8 for local untreated water and 8.1 for MWD water. Couldn’t find what the pH of the treated water at the tap was. --Lee Poulsen Pasadena, California, USA - USDA Zone 10a Latitude 34°N, Altitude 1150 ft/350 m > The water in San Diego,is about as alkaline as > potable water can get.. My neighbors had a lab test their water and PH was > between 7,6 and 7.9 over the testing period. > > They moved here recently and just thought the water was hard, I was a little > surprised the PH was that high? _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>