Great Lakes steel production dropped to 681,000 tons last week, a decrease of 18,000 tons, or 2.57 percent.
Steel mills in the Great Lakes region made 698,000 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 in Northwest Indiana.
Overall, domestic steel mills made 1.855 million tons of metal last week, up from the 1.828 million tons made the previous week.
U.S. steel mills have run at a capacity utilization rate of 76.9 percent so far this year, up from 74.6 percent at the same point in 2017, according to the AISI.
Domestic steelmakers used about 79.1 percent of their steelmaking capacity in the week that ended Aug. 11, up from 75.8 percent at the same time a year ago and up from 78 percent a week prior, according to the American Iron and Steel Institute.
Some analysts say steelmaking capacity utilization of about 90 percent is considered financially healthy for the industry, at least for the larger integrated mills like those around Lake Michigan in Northwest Indiana, because of their high fixed operating costs.
Nationally, as 25 percent Section 232 tariffs make imports more expensive, U.S. steel output is up by 3.6 percent so far this year, up dramatically from 3.1 percent two weeks prior, according to the American Iron and Steel Institute.
Production in the Southern district, a wide geographic swath that includes many mini mills, rose to 676,000 tons last week, up from 653,000 tons the previous week. Steel output in the greater Midwest rose to 192,000 tons last week, up from 180,000 tons the previous week.