The Fond du Lac County Public Health Officer says test results have come back negative on water samples taken following a major manure spill at a mega dairy farm near Pipe. An estimated 50,000 gallons spilled into Pipe Creek, floating downstream to Lake Winnebago. Signs have been posted at Columbia Park warning people to stay out of the water. Public Health Officer Kim Mueller says residents who live in the area are advised to get their well water tested. But Mueller says the DNR says its unlikely the spill would affect the drinking water. Mueller says tests on water from wells at Columbia Park have come back negative.