- Associated Press - Friday, July 15, 2016

MUNCIE, Ind. (AP) - Indiana Department of Environmental Management officials say agricultural weed-killer breakdown products were detected in 68 of 398 groundwater samples collected from private residential water wells and small public water supply wells in Indiana.

Herbicide degradation products were found in one of the eight wells sampled in Henry County and in one of the four wells sampled in Delaware County, The Star Press (https://tspne.ws/2a3wJ5Y ) reported.

The degradates were acetochlor and alachlor, which are herbicides commonly used in Indiana to control broadleaf and grassy weeds in soybeans and corn. Maximum contaminant levels for drinking water have’t been established for herbicide degradates.

The groundwater samples were collected in 2013 and 2014 from more than 270 private residential wells and nearly 130 public water supplies, such as churches, schools and small businesses.

About 1.6 million Indiana residents, or 26 percent of the state’s population, get their water from private, domestic wells which aren’t required to be tested for quality on a regular basis.

Indiana’s yearly groundwater monitoring program also found detectable levels of nitrated in two of the nine wells sampled in Wayne County, but they weren’t higher than the federal government’s maximum contaminant level for drinking water. The major sources of nitrated in drinking water are erosion of natural deposits, leaking septic tanks and runoff from fertilizer use.

Arsenic was also found in 12 samples from Delaware, Henry, Jay, Randolph and Wayne counties. The levels exceeded the maximum contaminant level in Jay, Randolph and Wayne counties.

Natural events, such as erosion of rocks or dissolution of minerals from clay can release arsenic into the water.

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Information from: The Star Press, https://www.thestarpress.com

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