I live in the woods in northern New York and am on well water. I never have checked my PH or PPM and I really dont care. This spring I'll be using soil and compost from my property adding perlite and CoM Stonington amendments and fish bone meal with some work castings. That's all, not synthetic nutes or fertilizers. All natural and as simple as you can get. Killer smell, killer taste..
You may not, but the plants do.
I don't think ppm/ec is used in organics much, ~can't find anything on it, i know mine is nearly zero, pretty sure, low enough I never think/thought about it. Only thing I could think of is if there is a minimal salt content (that is measuraable by ppm/ec), or a max(that is measuraable by ppm/ec).