Water quality Panama

Hi , i live in Panama City, Panama. Im trying to get our local water quality data, can't seem to find it online! any way of testing it to get the data needed .
Also i buy water for my house, so this is what i got from my supplier :
Quimical analisys (mg/l):

Ca ++ <0.1

Mg ++ <0.1

K + <0.1

Na + <0.1

HCO3 — 9.2

SO4 — < 1.0 Cl2 < 0.1

SlO2 < 1.0

*Total Dissolved Solids: 3.9 mg/l

Any suggestion if this water is ok or i have to add something..!
Tks for the help

This is RO (or rain) water. Very well suited for brewing. See the Primer here.

Hi Sorry, read it but units there don't match mine.. so do i have to add something or is not needed?
daniel

In the Primer the units are teaspoons and gallons. A teaspoon full is 5 grams and a gallon is 3.785 L. The units in your report are all, apparently, mg/L. Yes, per the Primer, you have to add about 5 grams of CaCl2 to each 20 L of water this low in mineral content.