On April 23rd, students in Mrs. Ridgeley's Conservation Biology classes conducted pH testing on our local rain water. For the second year in a row, the news is good! The rain was collected from April 16-21 and students consistantly found pH results in the 5.5 - 6.5 range. Rain is categorized as "acid rain" if it has a pH below 5.6.

This lab follows our tropospheric ozone lab and bridges our air pollution and water pollution units. The values determined by the students this year (and last!) are a marked improvement over those determined from labs in previous years - when the pH of our local rain was determined to be in the same range as popular carbonated soft drinks !