New Jersey Water Science Center

USGS scientists deploy a monitoring buoy on Lake Hopatcong, New Jersey, to monitor water-quality conditions and a harmful algal bloom in near real-time. USGS scientist Karl Braun is photographed.

USGS scientists Brad Bjorklund and Jon Cohl collect a water-quality sample at Lake Hopatcong, New Jersey, to monitor a harmful algal bloom on the lake.

USGS monitoring buoy deployed on Lake Hopatcong, New Jersey, to monitor water-quality conditions and a harmful algal bloom in near real-time.

The New Jersey Department of Environmental Protection advised the public to avoid swimming in or contact with Lake Hopatcong water due to a harmful algal bloom confirmed in June 2019 by aerial surveillance. To help study water-quality conditions and the bloom’s severity, the USGS installed a monitoring buoy on the lake in July.

Harmful Algal Bloom on Lake Hopatcong.

Photo of the Deleware River near Lambertville, NJ and New Hope, PA.

USGS Scientists collecting Biological samples in stream bed

USGS Hydrologist Robert Rosman sketching site information at a production well during a water-level-site visit, Camden County.

USGS Scientist Robert Rossman checking groundwater levels with a steel tape 

USGS Hydrologist Robert Rosman using an electric tape to measure static water level in a production well, Burlington County. 

Map depicting the bounderies of the New Jersey Pinelands Management Areas