Dairy producers have begun reporting their milk production in the form of milk powder instead of milk, but the industry still has some milk remaining to be sold.
The latest numbers show dairy producers in North Dakota reported a surplus of 2,547,000 gallons (9.8 million liters) of milk in July.
The average of that figure was 2,073,000 liters per farm.
That compares to an average of 2.3 million gallons (6.6 million litels) per farm in August.
The dairy industry has struggled in recent years to compete with cheap milk from the United States.
The industry has also struggled with rising global food prices and the rise of dairy products.
But a recent report from the Department of Agriculture shows that overall milk production is down in recent months.
The USDA said the U.S. milk industry lost 7.5 million barrels (22 million gallons) of dairy product to imports in July and the nation lost about 2.1 million barrels of milk to other products.