Effects of storm runoff on water quality in the Mill Creek drainage basin, Willingboro, New Jersey

Water-Resources Investigations Report 80-98



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The effect of storm runoff on the quality of water in streams receiving drainage from the 23.7-square-kilometer Mill Creek basin in Willingboro, NJ., was studied from October 1975 to September 1976. Stream discharge and 86 water-quality constituents were measured during base flow and storm runoff. Only 38 constitutents were detected in significant amounts under any streamflow condition. Constituent loads and concentrations in the runoff from the nonresidential part of the study area in the upstream part of the drainage basin affected stream quality more than runoff from the residential area. The nonresidential area contributed more of the nutrient load (nitrate, ammonia, organic nitrogen, and phosphorus), the common inorganics (sodium , potassium, magnesium, chloride, and sulfate), sediment, and organic carbon. The residential area contributed more calcium, nitrite, lead, iron, biochemical oxygen demand, and the pesticides, 2,4-D and silvex. With the exception of suspended iron, fecal coliform bacteria, suspended lead, and suspended phosphorus, all measured constituents met the recommended criteria set by the U.S. Environmental Protection Agency and the New Jersey Department of Environmental Protection, even during storms. (USGS)

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Effects of storm runoff on water quality in the Mill Creek drainage basin, Willingboro, New Jersey
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Water-Resources Investigations Report
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U.S. Geological Survey, Water Resources Division,
viii, 111 p. :ill., maps ;28 cm.