Continuous Monitoring For Total Chlorophyll-A and Four Classes of Algae and Analysis of Water Samples For Dissolved Organic Carbon at Passaic River Below Two Bridges, NJ: Research Project Summary



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Trenton, N.J. : New Jersey Department of Environmental Protection, Division of Science, Research and Environmental Health


This project was a joint funding agreement between the NJ Department of Environmental Protection, Division of Science, Research, and Environmental Health; the USGS New Jersey Water Science Center; Passaic Valley Water Commission; North Jersey Water Supply Commission; and Rutgers University. This objective of this study was to test two new field-deployable technologies that together provide nutrient and dissolved organic carbon data along with classification of algae type by correlation to the chlorophyll responses. The BBE AlgaeGuard meter is a highly sensitive, submersible spectrofluorometer with automatic algae classification and chlorophyll analysis. The second sensor platform tested at the monitoring station was an S::SCAN unit. The S::SCAN Spectrolyzer is a miniature ultra-violet/visible light spectrophotometer that estimates the concentration of dissolved organic carbon and nitrate plus nitrite. This study was conducted at the Two Bridges USGS surface water monitoring station located in Wayne Township, Passaic County, NJ. Since two major drinking water purveyors withdraw raw water in the vicinity of this station, the location provides the opportunity to evaluate the ability to accurately measure continuous nitrate+nitrite levels, as well as assess beneficial and harmful algae blooms; two factors that impact the water treatment operations at both facilities. Concentrations of measured real-time data from the BBE and S::SCAN sensors calibrated well to the concentrations of lab-analyzed grab samples.


Prepared by R. Lee Lippincott Ph. D. (Project Manager).


New Jersey