A COMPARISON OF MASSACHUSETTS’ FRESHWATER LAKE AND STREAM ACIDITY BETWEEN 1990 AND 2020

We sampled the pH in 71 lakes and streams across Massachusetts and mapped out the results using GIS. We compared present day acidity levels with data from 30 years ago to calculate how much conditions have improved as a result of stricter air quality regulations; this is important because acidity levels play a major role in aquatic ecosystem health.