Great Lakes steel production rose to 682,000 tons last week, a 2.4 percent increase.
Steel mills in the Great Lakes region made 666,000 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 1.815 million tons of metal last week, up from the 1.783 million tons made the previous week.
U.S. steel mills have run at a capacity utilization rate of 76.4 percent so far this year, up from 74.4 percent at the same point in 2017, according to the AISI.
Domestic steelmakers used about 77.4 percent of their steelmaking capacity in the week that ended July 21, up from 74.3 percent at the same time a year ago and up from 76.1 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, U.S. steel output is up by 3 percent so far this year, according to the American Iron and Steel Institute.
Production in the Southern district, a wide geographic swath that includes many mini mills, rose to 662,000 tons last week, up from 659,000 tons the previous week. Steel output in the greater Midwest fell to 179,000 tons last week, down from 186,000 tons the previous week.