[denny]

Will the use of Campden tablets (Potassium Metabisulfite) change the profile at all?

No

[DavidHoran]

I know that the only source of the water I use comes from an artesian well between Binghamton NY.and Silver Lake  Pa.the ph does not change and it is neutral for using for spirits and wine also-ran beer and have been very satisfied for years

[joeinma]

Can't find my Ward Labs Report, but this was my numbers in 2020 for Braintree, Mass that I plugged in BeerSmith:

pH  7.6
Ca  15.6
Mg   4.0
Na   99.0
SO4   9.0
Cl     165.0
HCO3  30.0

Alkalinity 25
Effective Hardness 13
Residual Alkalinity 11

TDS was something like 350.   

Needless to say that due to sodium & chloride numbers, I use distilled water instead of tap.

[pv]

Upstate South Carolina well

From Ward Labs:

pH:  6.6
TDS:  66 ppm
Na:  5 ppm
K:  2 ppm
Ca:  9.5 ppm
Mg:  2 ppm
Total Hardness, CaCO₃  31 ppm
SO₄-S:  <1 ppm
Cl:  3 ppm
CO₃:  <1.0 ppm
HCO₃:  33 ppm
Total Alkalinity, CaCO₃:  27 ppm
P:  0.04 ppm
Fe:  <0.01 ppm

[Cliffs]

Upstate South Carolina well

From Ward Labs:

pH:  6.6
TDS:  66 ppm
Na:  5 ppm
K:  2 ppm
Ca:  9.5 ppm
Mg:  2 ppm
Total Hardness, CaCO₃  31 ppm
SO₄-S:  <1 ppm
Cl:  3 ppm
CO₃:  <1.0 ppm
HCO₃:  33 ppm
Total Alkalinity, CaCO₃:  27 ppm
P:  0.04 ppm
Fe:  <0.01 ppm

thats beautiful water for brewing, no quite a blank slate, but pretty close