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News & Information

Lake Hopatcong Update

Release Date: August 19, 2019


DEP Lifts Harmful Algal Bloom Advisory for Six Beaches on Lake Hopatcong in Area from Byram Bay to Halsey Island Advisory Update.


The Department of Environmental Protection’s advisory about bodily contact with lake water has been lifted in the Indian Harbor area of Lake Hopatcong. Advisory Update.


The New Jersey Communicable Disease Service (CDS) recently launched a waterborne illness web page where information related to HAB illness is provided. You can find the website here: external link


High-Tech Buoys Deployed as Part of Multifaceted Response to Lake Hopatcong Harmful Algal Bloom as Swimming and Contact Advisory Remains in Effect

(19/P057) TRENTON –The Department of Environmental Protection and U.S. Geological Survey this week deployed high-tech real-time monitoring buoys as part of a comprehensive response to the widespread Harmful Algal Bloom, or HAB, affecting northern New Jersey's Lake Hopatcong. There is no scientifically sound treatment to eliminate HABs from water bodies, so advanced and continuous monitoring is the key element in protecting health and assessing when the lake is safe for recreation.

Full DEP News Release
Full DEP News Release as downloadable PDF
NJ DEP real-time monitoring data
USGS real-time data
NJ DEP Harmful Algae Blooms (HAB) Website

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