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Environment and Human Rights Resources
   

pH Value

"measure of the acidity or alkalinity of a liquid. A pH value in the range of 0 to 7 indicates acidity, a pH value in the range of 7 to 14 indicates alkalinity, and a pH value of 7 signifies neutrality."

Source: United Nations, Glossary of Environment Statistics
   
AAAS Science and Human Rights Program
Copyright 2002