The Iowa Department of Natural Resources is reviewing water testing done for nitrates in 43 public water supplies after discovering some results which didn’t look right. D-N-R environmental specialist, Kathy Lee, says the problem happened with samples tested by Mangold Environmental Testing in Storm Lake.

Lee says they asked Mangold to stop doing samples and have been working with them to try and determine what went wrong.

She says they haven’t determined that any of the samples tested had high levels of nitrates.  Lee says the water supplies are periodically tested to be sure the nitrate levels meet acceptable federal standards.

Lee says Mangold has been cooperating with them as they try to figure out the issue. She says the D-N-R does requires notification within 15 days when new equipment is placed into service at testing facilities and Mangold didn’t let them know for a couple of months. Lee doesn’t know yet if the company will face a penalty for the late reporting.