The Iowa Department of Natural Resources says high water levels from the Missouri River likely played into a drinking water violation in Sioux City involving disinfection byproducts. Samples collected mid-August at one of the city’s eight testing sites showed it was a little bit above the Environmental Protection Agency’s standard for trihalomethanes. The city’s running average for that site for the last year is also above the standard. Julie Sievers is an environmental specialist senior with