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State of New Jersey Department of Environmental Protection

State of New Jersey Department of Environmental Protection
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USGS-CDC New Jersey Drinking Water Treatment Plant Study

Fate of Organic Wastewater Contaminants in a Drinking-Water Treatment Facility
Paul E. Stackelberg, U.S. Geological Survey, Phil Roosa, Passaic Valley Water Commission, Alden Henderson and Nicole Smith Centers for Disease Control and Prevention (staff support from Lee Lippincott, NJDEP)

A public community drinking water treatment plant using surface water as its water source and graphhaving significant upstream wastewater discharge was selected for this component of the study. It was of interest to the researchers to determine the efficiency of removal for the chemicals that were detected in the raw source water. The drinking water facility uses “conventional treatment” which consists of pre-disinfection with chlorine, flocculation/sedimentation, filtration, and post-disinfection with chlorine. Raw water, settled water, filtered water and delivered (finished) drinking water was sampled at this one facility to examine the water treatment process and measure removal efficiencies for these trace organic contaminants.

Part of the preliminary assessment of water treatment efficiency is presented in the Figure. The Figure shows the concentrations of 11 contaminants as they move thorough the treatment process. Tetrachloroethylene is a New Jersey regulated contaminant with a maximum contaminant level (MCL) of 1 part-per-billion (ppb). The level detected in this research project was well below the MCL at approximately 0.05 ppb.

Division of Science, Research and Environmental Health
Dr. Gary A. Buchanan, Director
Mailing Address:
Mail code 428-01, P.O. Box 420
Trenton, NJ 0862

Phone: (609) 984-6070
Fax: (609) 292-7340