State Water Resources Research Institute Program

Project ID: 2007ME98B
Title: The influence of chloride and natural organic matter gradients on disinfection by-product formation in Maine
Project Type: Research
Start Date: 3/01/2007
End Date: 2/28/2008
Congressional District: 2
Focus Categories: Water Quality, Water Supply, Surface Water
Keywords: disinfection by-products, total organic carbon, chloride
Principal Investigators: Peckenham, John; Lipfert, Gail E; Solouki, Touradj; Tolman, Andy
Federal Funds: $ 5,208
Non-Federal Matching Funds: $ 20,551
Abstract: This project evaluates the potential of disinfection by-product (DBP) formation in source waters for the purpose of determining the availability of treatable water resources. This project quantifies the spatial controls on watershed and total organic carbon (TOC) characteristics and chloride gradients to predict disinfection by-products (DBPs) in source water across the state of Maine. Concentrations of trihalomethanes (THMs), haloacetic acids (HAAs), total organic carbon (TOC), and the ratios of THM to HAA increase with distance from the ocean, whereas chloride concentrations decrease. The relationships among these trends, however, are not clear cut. Structural, compositional, and reactive properties of TOC are measured and compared with watershed properties, such as land use, land cover, drainage ratio, and soil adsorption. The role of the chloride gradient is tested by measuring DBP formation with variable chloride concentrations experimentally.

Progress/Completion Report, PDF

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