With that water source, you may well get different test results at different times. You have what is essentially, surface water, which can change according to the season and even throughout the day. Your hardness will be quite low and your pH may need to be addressed. Do you have copper plumbing?
Your tests don't indicate that health issues had been addressed. With that type of well, a disinfection may be recommended and a drinking water purifier is recommended.
I would avoid a 'chemical feed' neutralize with pH at those levels. A mineral-based system would be better. Does PCM mean power control modulator?