Regular water quality monitoring is essential to assess the overall health of Lake Hopatcong on an ongoing basis. Monitoring provides information to identify long-term trends or changes in water quality and to quantify and assess the success and potential impacts of restoration efforts. In-lake monitoring takes place during the growing season from May through September each year at eleven sampling stations on the lake.
The Lake Hopatcong Commission and its predecessor, the Lake Hopatcong Regional Planning Board, have conducted regular water quality monitoring on Lake Hopatcong since the 1980s. Since 2001, this monitoring has been performed by Princeton Hydro, LLC. In 2013 and 2017, the Lake Hopatcong Foundation provided funding to continue water quality monitoring to prevent a gap in the monitoring data. Currently, state funding covers the cost through the Lake Hopatcong Commission. We thank them for providing the reports so we can make them available here.