A solution with a pH of 3 is considered acidic. It is roughly the same level of acidity as lemonade or an apple, according to the U.S. Environmental Protection Agency.
The pH scale is used to measure how acidic or basic a substance is. It ranges from 0 to 14. A pH of 7 is neutral. Pure water is an example of a neutral solution. A pH under 7 is acidic. Each whole number below 7 is 10 times more acidic than the number above it. Above 7 are the basic, or alkaline, substances, with each whole number being 10 times more alkaline than the preceding number.