Here is the latest Iowa news from The Associated Press

SHELDAHL, Iowa (AP) — The central Iowa city of Sheldahl has issued a bottled water advisory after testing found concentrations of nitrate more than twice the maximum level considered safe. The Iowa Department of Natural Resources says officials issued the advisory Friday after the DNR found nitrate levels of just over 2 milligrams per liter of water. The sample was taken November 4th but a laboratory didn’t notify the DNR within 24 hours as required. The city is flushing its water system. The DNR is conducting additional tests. The water is considered safe for adults and children older than 6 months but can be dangerous for younger children.

DES MOINES, Iowa (AP) — A report from Agriculture’s Clean Water Alliance says half of the 45 monitoring sites on the Raccoon River in central Iowa are showing the highest average nitrate levels in 10 years of data collection. The Des Moines Register reports the data on the river, which is a source of drinking water for 500,000 central Iowa residents, was included in the agribusiness group’s Thursday report.

CORALVILLE, Iowa (AP) — An Iowa inmate accused of trying to kill another inmate has been sentenced to additional time in prison. The Globe Gazette reports 22-year-old Michael Swanson was sentenced this month to 25 years in prison following a guilty plea of attempted murder. A criminal complaint says Swanson slashed an inmate in the neck at the Iowa Medical and Classification Center in Coralville in November 2014. The victim required stiches for several cuts. Swanson was serving two life sentences at the time for the 2010 shooting deaths of 47-year-old Vicky Bowman-Hall and 61-year-old Sheila Myers. The women were working at separate convenience stores at the time of their deaths.

DAVENPORT, Iowa (AP) — Students from 18 high schools in the Quad-Cities area have collected enough food for nearly 548,000 meals. Officials at a final rally at the River Bend Foodbank in Davenport Thursday said students participating in the Student Hunger Drive gathered more than 657,000 pounds of food over the past six weeks — about 4,000 more pounds than last year. The food bank serves 22 counties in eastern Iowa and western Illinois.