Important standards to assess water quality:
pH: Neutral (between 6 – 8).
The pH levels of water tell us if the water is alkaline or acidic. A neutral pH level is 7. Less than 7 is acidic and greater than 7 is alkaline.
Hardness: 1 – 4 grains is ideal. Hard water can flatten taste and cloud iced tea.
Hard water is water that has high mineral content (as opposed to "soft water"). Calcium is the most common mineral associated with water hardness. Water hardness is measured in ‘grains’ per gallon.
Total Dissolved Solids (TDS): 50 – 150 ppm. These are often marked on bottled water.
Total dissolved solids (TDS) comprise inorganic salts (principally calcium, magnesium, potassium, sodium, bicarbonates, chlorides, and sulfates) and some small amounts of organic matter that are dissolved in water.
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