Great Lakes steel production plummeted by 37,000 tons to 666,000 tons last week, a decrease of 5.26% as compared to the previous week.
It snapped a streak of three weeks of increase in local steel production. Last week was the 12th time in 16 weeks that Great Lakes steel output fell after market conditions worsened this summer.
Steel mills in the Great Lakes region made 703,000 tons of metal the previous week, according to the American Iron and Steel Institute. Most of the steel made in the Great Lakes region is produced around the southern shore of Lake Michigan in Lake and Porter counties, which are home to half the nation's blast furnace capacity.
Overall, domestic steel mills in the United States made 1.825 million tons of steel last week, up 0.9% from 1.809 million tons the previous week.
So far this year, domestic steel mills in the United States have made 72.5 million tons of steel, a 3.4% increase over the same period in 2018. Steel production was up 11.6% nationally in the first week of 2019, but the difference between 2019's and last year's output has been declining ever since.
U.S. steel mills have run at a capacity utilization rate of 80.6% through Sept. 28, up from 77.5% at the same point in 2018, according to the American Iron and Steel Institute.
Domestic steelmakers used about 78.4% of their steelmaking capacity in the week that ended Sept. 28, down from 79.6% a year earlier but up from 77.5% the previous week, according to the AISI.
A steel capacity utilization rate of 83.4% earlier this year was the highest level reached in the United States since September 2008, according to the trade publication Platts.
The domestic steel industry had not been running at 80% capacity for years, but capacity use generally has been higher since the Section 232 tariffs of 25% were enacted. U.S. Steel, however, recently announced plans to idle East Chicago Tin and blast furnaces, including one at Gary Works, cautioning that its third-quarter revenues are expected to plunge as a result of weakening prices and market conditions.
Steel mill capacity use across the United States has fallen under the 80% threshold targeted by the Trump administration's Section 232 tariffs for the past few weeks.