Yes, mg/L is the same as ppm for dilute solutions like brewing water.
Potassium is usually low, so its unimportant.
Carbonate hardness is the same as alkalinity, so I don't understand why the report says bicarb is 6 mg. Bicarb should be more like 89 ppm.
Nitrite is usually low, so its unimportant.
Chloride and sulfate are important. Looking at the hardness, it suggests that the chloride and sulfate are probably fairly low (say <30 ppm). The problem is that the report also does not include sodium. Sodium is another important ion to help decipher this profile.
Time to make a phone call to the water company lab or send a sample to Ward.
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