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Top is tap water, bottom after RO system. The EPA says a max of 10ppm is acceptable and that looks between 10 and 20. Other studies say anything over 5 ppm is unsafe. Iowa drinking water :(
Top is tap water, bottom after RO system. The EPA says a max of 10ppm is acceptable and that looks between 10 and 20. Other studies say anything over 5 ppm is unsafe. Iowa drinking water :(