TDS in Nashville water

[PoipuIdol]

Hi all,
What is the typical level of total dissolved solids in Nashville water? How low does everyones TDS level normally get when you RO/DI filter the Nashville water?

[fishdoc11]

My tap was 126 last time I tested it. I'm sure it varies though. I typically get 0 TDS after it goes through the RO/DI.
Chris

[TN_sledge]

My water in the boro was 180ish last time I tested. After RO/DI is 0.

[wooglin]

Mine is 120ish before RO/DI, 3 after RO stage, and 0 after DI stage.

[gflat65]

North side of town (G'lettsville) is around 140-150. 9ppm out of RO unit, 0 ppm out of RO/DI.

[PoipuIdol]

hmm 3 ppm out of the unit. Maybe its time for a new DI stage. Does anyone know what TDS includes? Does it include ionic solids like copper2+? What about phosphate, that can't be a solid.