In what I have read, PPM of straight water can be as high as 250 - 300, for a high side, so I believe you are all good. I think Buyeye is right though, I would want a water quality report to know what solids are in your water.
I assume you have been giving them this well water thus far in their growth and your plants look good.
In looking at your soil, perhaps a little more perlite would have been a good thing..... just sayin.
Good luck and keep us posted.