I finally got around to buying a TDS meter which arrived today in the mail. I live in Dekalb County, near Marist school, and my tap water TDS is 049. My RODI is 000 as it should be, but interestingly my RODI storage container is 001.
Whopping 78 here in Hapeville, and occasionally, bath water comes out a PUSLIKE yellowish green color. Now thAT I found my TDS meter, I'm going to check it when it's like that.
Dekalb as well just on the other side of 400 from you. 41 from the tap and 0 from RODI. Unless you really clean your container, there will be some residue.
On a side note, I tested the PO4- out of the tap in Atlanta near Piedmont Park today for a preschool with a green freshwater tank as a favor for a client. It was 2.0ppm. Yeesh.