If your tap water is 701 do not drink it. That would be extreme. And if your tap water is that high then the 146 might be 1460 depending on how the meter reads. Do you have any calibration solution to check the meter with ?

Looking at the info on the meter. Did you see a blinking 10x light ?

Checking the meter is number one. Then you can go from there.

For now I would get some R/O water or distilled water and put in your areo system untill you figure out the meter. Either one should show next to nothing on the meter. If thats the case you got some hella water coming out of that tap.