SIOUX CITY, Iowa (AP) — Three neighboring cities are resisting paying Sioux City’s long-overlooked wastewater service charge. The Sioux City Journal reports that the city discovered the neglected charge during an audit and notified officials in Sergeant Bluff, in North Sioux City, South Dakota; and South Sioux City, Nebraska, that it would begin imposing the 7 percent charge on July 1.

Those cities’ officials worry about having to pass along the cost to their residents, so the officials want to talk over the charge with Sioux City officials.

The agreements with each city for sewage treatment at the Sioux City plant have been overlooked for at least the past two years and potentially longer. Sioux City utilities director Mark Simms says the charge essentially covers administrative costs, and he isn’t sure why it’s been overlooked.