The agency has not yet penalized Petro Harvester for the July spill, thought it has issued a notice of violation and could impose a fine in the future, Roberts said, one of several spill-related enforcement actions the agency is considering.
Derrick Braaten, a Bismarck lawyer whose firm represents dozens of farmers and landowner groups, said his clients often get little support from regulators when oil companies damage their property.
State officials step in in the largest cases, he said, but let smaller ones slide. Landowners can sue, but most prefer to take whatever drillers offer rather than taking their chances in court.
"The oil company will say, that's worth $400 an acre, so here's $400 for ruining that acre," Braaten said.
Daryl Peterson, a client of Braaten's who is not related to Darwin Peterson, said a series of drilling waste releases stretching back 15 years have rendered several acres unusable of the 2,000 or so he farms. The state has not compelled the companies that caused the damage to repair it, he said. Peterson hasn't wanted to spend the hundreds of thousands of dollars it would take to haul out the dirt and replace it, so the land lies fallow.
"I pay taxes on that land," he said.
At least 15 North Dakota residents, frustrated with state officials' inaction, have taken drilling-related complaints to the U.S. Environmental Protection Agency in the last two years, records show.
Last September, for example, a rancher near Williston told the EPA that Brigham Oil and Gas had plowed through the side of a waste pit, sending fluid into the pond his cattle drink from and a nearby creek. When the rancher called Brigham to complain, he said, an employee told him this was "the way they do business."
A spokeswoman for Statoil, which acquired Brigham, said the company stores only fresh water in open pits, not wastewater, and that "we can't remember ever having responded in such a manner" to a report about a spill.
Federal officials can offer little relief.
Congress has largely delegated oversight of oil field spills to the states. EPA spokesman Richard Mylott said the agency investigates complaints about releases on federal lands, but refers complaints involving private property to state regulators.
The EPA handed the complaint about Brigham to an official with North Dakota's Health Department, who said he had already spoken to the company.
"They said this was an isolated occurrence, this is not how they handle frac water and it would not happen again," the official wrote to the EPA. "As far as we are concerned, this complaint is closed."
Salting the Earth
Six years ago, a four-inch saltwater pipeline ruptured just outside Linda Monson's property line, leaking about a million gallons of salty wastewater.
As it cascaded down a hill and into Charbonneau Creek, which cuts through Monson's pasture, the spill deposited metals and carcinogenic hydrocarbons in the soil. The toxic brew wiped out the creek's fish, turtles and other life, reaching 15 miles downstream.
After suing Zenergy Inc., the oil company that owns the line, Monson reached a settlement that restricts what she can say about the incident.