Most acidic acid rain

A pH reading of 2.83 was recorded over the Great Lakes, USA/Canada, in 1982 and a reading of 1.87 was recorded at Inverpolly Forest, Highland, Scotland, in 1983. These are the lowest pH levels ever recorded in acid precipitation, making it the most acid acid rain.   pH values range from 0 to 14 with 7 being neutral. Water has a pH of 7 for example. The lower the number the higher the acid level of any given substance. The study was made by Darrell Kirk Nordstrom and Charles Alpers of US Geological Survey and published in the American Chemical Society Journal.