Effects of Agriculture on Ground-Water Quality in Dade County, Florida

by Barbara Howie,

Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution


Multidepth wells at five test fields and a monitoring network of water-table wells in Dade County, Florida, were sampled twice during 1985 to determine concentrations of nitrogen, phosphorus, micronutrients, sludge contaminants, organic priority pollutants, and pesticides in ground water. Elevated concentrations of nitrate and potassium were found in ground water underlying agricultural areas, and elevated concentrations of arsenic, iron, manganese, potassium, chloride, ammonia, and nitrate were found in ground water underlying point sources of agriculture chemicals. The organochlorine compounds lindane (one background site at 0. 01 microgram per liter), DDE (two agricultural sites at 0. 01 microgram per liter), and dieldrin (one agricultural site at 0. 02 microgram per liter) were the only organic compounds detected.

Subject Headings: Groundwater quality | Irrigation water | Wells (water) | Nitrates | Chemical elements | Water pollution | Water quality | Agricultural wastes | Florida | United States

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