Primo has a publicly available water quality report from 2017 (available thru Google search). The report is detailed, but it lacks information on minerals of concern to brewers.
Here are the test results of a Primo Purified sample sent to Ward Labs:
pH 7.1 (2017 Primo report shows pH of 6.28)
Total Dissolved Solids (TDS) Est, ppm 32
Electrical Conductivity, mmho/cm 0.05
Cations / Anions, me/L 0.4 / 0.2
All results below are ppm…
Sodium, Na < 1
Potassium, K 6
Calcium, Ca 3.6
Magnesium, Mg < 1
Total Hardness, CaCO3 10
Nitrate, NO3-N 0.3 (SAFE)
Sulfate, SO4-S < 1
Chloride, Cl 7
Carbonate, CO3 < 1.0
Bicarbonate, HCO3 < 1
Total Alkalinity, CaCO3 < 1
Total Phosphorus, P < 0.01
Total Iron, Fe < 0.01
“<” - Not Detected / Below Detection Limit
Hope this helps!