I was quite diplomatic when ...

I was quite diplomatic when I asked if you had both chlorine and chloride analysis with "brackish" water.  Your water analysis is not complete indicated by TDS of only 150 for brackish.  What is the condictivity of the water?  How was it tested for TDS.  This is not a complete test result, and does it change over time"?  Calcium at 15, or calcium carbonate at 15.  This makes a big difference.  For a closed loop the pH need to be at 9,5.  What do you mean by cooling media.  The question about tower or a closed loop that only has a 5% water loss per year is significant to the water treatment of the system.  

As you have presented it: this water is NOT OK for the pipeline, it needs to be treated.