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State of New Jersey-Department of Environmental Protection-Division of Water Monitoring and Standards
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NJ HAB Response Strategy Document

  Bureau of Freshwater & Biological Monitoring

Routine & Response-Related Monitoring
Lake Monitoring Network

BFBMs Lake Monitoring Network collects ambient water quality information for NJ lakes consisting of three components: Statewide statistical (probabilistic) survey, statewide reference lakes, and targeted regional lakes.

Details on the lakes network can be found by clicking on the link.

Routine Cyanotoxin Sampling

Microcystins: collected from all Network lakes, at one meter depth (or half total depth in lakes less than 1.5m deep) during the growing season.

Cylindrospermopsin and Anatoxin-a: occurs infrequently, and will be analyzed only if taxa are present which may produce these toxins. Additional samples will be collected if there is an obvious bloom observed on the lake surface.

Cyanobacteria Screening

If bloom observed, a sample may be screened in two ways to determine if more quantitative analysis is necessary:

Sample analyzed with a Turner Designs Aquafluor handheld fluorometer. This device will measure the phycocyanin and chlorophyll a pigments to detect the presence and abundance of cyanobacteria.

Microscopic analysis to identify and confirm the presence of cyanobacteria taxa in the sample.


If a confirmed Harmful Algal Bloom is present with levels quantified at or above the NJ Health Advisory Guidance, BFBM and DWM&S management will be alerted and a response plan will be developed.

May include follow-up sampling in the frequency and duration necessary to confirm the continued presence or absence of the initial bloom.

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Last Updated: March 25, 2019