Over nearly three years runoff from four Northwest Arkansas (36˚ 00’ N; 94˚ 25’ W) pasture fields was collected and analyzed for fecal coliform (FC) and fecal streptococcus (FS), to determine the effects of grazing, fertilizing, timing and amount of runoff events. The fields were grazed and fertilized during the study, with two fields receiving animal manure and the other two receiving inorganic fertilizer. The sites were grazed by dairy cattle during the study with varied grazing densities. Samples of runoff were collected within 24 hours of each runoff event.
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