Very fortunate, crazy you can only be a few towns away and have such a drastic difference in TDS. What kind of system are you running? Standard 4 stage?
I run the BRS 4 Stage 150 GPD plus water saver. I have a booster pump, but don't use it. Last time I installed it the booster pump it was not working properly. I need to go back and try to reinstall it and fine the issue.