by 
fishboy
ANSWERS: 4
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The pH of pure water is 7, ie neutral. The hardness depends on the source and the area you live in :-)
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It depends entirely apon what wWater Company provides your water and which part of the country you live. So, what does pH mean for water? Basically, the pH value determines whether water is hard or soft. The pH of pure water is 7. In general, water with a pH lower than 7 is considered acidic, and with a pH greater than 7, basic. The normal range for pH in surface water systems is 6.5 to 8.5 and for groundwater systems 6 to 8.5. Alkalinity is a measure of the capacity of the water to resist a change in pH that would tend to make the water more acidic. The measurement of alkalinity and pH is needed to determine the corrosiveness of the water.
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I totally agree with you guys, when I was taking my analytical chemistry lab the pH would vary or the trace elements would vary from different places around my home campus, 7.2-7.4 roughly is the pH. the pH depends on a lot of factors, you can look this up in more detail on environmental protection agency website, they have A LOT of stuff on water, and what amount of trace metals are okay to consume.
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you could try goggling it
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