During the 2021 drought, nearly 800 Minnesota farmers with high-capacity wells pumped 6.5 billion more gallons of water than their permits allowed, state records show.
Farms on land owned or operated by R.D. Offutt Co., a potato-growing giant that has become one of the biggest water users in the state, were responsible for 23% of the excessive pumping.
"That's quite a bit of overuse," said Randall Doneen, a section manager for the Minnesota Department of Natural Resources. "We're trying to get people back into compliance."
The overpumping in 2021 put more stress on already depleted aquifers, lakes and streams and raised the risk that neighboring wells would run dry.
A Star Tribune review of water permit data reported each year to the DNR found more than three of four water users who violated their permits were agricultural irrigators. But they are unlikely to face fines or other consequences because of laws that the DNR says are too lenient. Many irrigators may not even have to pay for the extra water they used, based on the tiered fee system the state charges heavy users.
In some cases, farmers needed to go over their permits to keep their crops alive, said Jake Wildman, president of the Irrigators Association of Minnesota.
"Nobody wants to have to pump as much we did," Wildman said. "We all understand rules and regulations are there for a reason. We all want to follow them. I truly believe we did the best we could with the tools we had and climate we were given."
The permit violations on R.D. Offutt farms is particularly concerning to neighbors and water quality advocates because many of them arein the Pineland Sands region of central Minnesota. The same sandy porous soil that makes the land attractive for growing potatoes also makes it vulnerable to pollution.