The Tuolumne County Water Quality Plan calls for monitoring targeted local streams to determine the effectiveness of plan implementation — enter the Tuolumne County Stream Team — a group of local citizens trained to monitor stream health. On September 17, 2005 Erick Burres of the State Water Resources Control Board Clean Water Team visited Tuolumne County to provide training for a few of the team’s future crew leaders. In 2007, the Tuolumne County Resource Conservation District took over responsibility of Stream Team.
Water quality is defined as a measure of the physical, chemical, biological, and microbiological characteristics of water, monitoring water quality provides empirical evidence to support decision making on health and environmental issues. A day of Stream Team starts with calibrating a Hanna Instruments multi parameter probe to acquire temperature (C°), pH, electrical conductivity (EC[µS/cm]), dissolved oxygen (%, ppm), and turbidity data (FNU). Tools are carefully checked to ensure that the instrument reads accurately in the field.