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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 when Chlorophyll a levels are > 10g/l. 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: January 7, 2019