RO water and PPM

So I decided to try going to the local grocery store and fill up jugs with RO water and when I got home and checked with TDS meter it was around 70 ppm.... I guess I thought RO water would be lower ppm should I not bother using??
 
Make sure the refill station didn't say that they remineralize it. I've seen ones that do RO and then they run it through a remineralizer to put minerals back in after "cleaning" the water through RO

The grocery store by me, Save-on (Western Canada only, sorry) has 0 ppm
The Sobeys had between 7ppm - 14ppm

I've never seen a water jug refill station at Canadian Tire though!?

The gas station I go to has a car wash attached but they also sell water because they have the RO system already, but a couple times it had a weird smell like they ran chemicals through it and it didn't rinse out properly.
 
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