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| pH is the measure of relative acidity or alkalinity of water. Water with a pH of 7 is considered neutral. pH levels less that 7 are acidic, while pH levels higher than 7 are basic (alkaline). The pH scale ranges from 0 to 14. |
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| 1. Rinse tube thoroughly in stream or river. | 2. Fill tube to the top of the first clear section with sample to be tested. | 3. Wearing safety goggles, add eight (8) drops of green indicator solution. Mix sample and solution by inverting tube. | 4. Place sample into color comparator and turn color wheel until sample matches one of the colors on the wheel. Read pH number in window on the front of the black box. |
