Keep in mind that RO water means that is has been through an RO filter. This says nothing about what remains. To give you an example, I make water with a 99% rejection rate. My RO water has a TDS of 2ppm. A machine RO unit may have a 90% rejection rate and leave a lot left over. It's not so much the numbers left over, but what compounds are left over.
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If you really want to save the planet, then go somewhere else!!
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