Raw steel production in the country's Great Lakes region was about 682,000 tons in the week ending June 22, according to an American Iron and Steel Institute estimate.
Production rose by 17,000 tons from the week prior, an increase of about 2.5 percent. Most of the raw steel production in the Great Lakes region takes place in Indiana and the Chicago area.
Production in the Southern District was estimated at 651,000 tons last week, down from 653,000 tons a week earlier.
Total domestic raw steel production last week was 1.88 million tons, up from 1.87 million tons the week prior.
U.S. steel mills had a capacity utilization rate of 78.5 percent last week, which is up slightly from 78.1 percent a week earlier. The capacity utilization rate had been 74.8 percent at the same time last year.
So far this year, domestic steel producers have had a capacity utilization rate of 76.8 percent, which is down 2 percentage points from the same period in 2012.
Domestic mills have produced an estimated 46 tons of steel this year, down 6.2 percent from the same period last year. The mills had made about 49 million tons of steel by June 22 in 2012.
Through the end of April, U.S. mills had shipped 31.5 million net tons of steel, a 6.3 percent decrease from the same period in 2012. Increases in shipments of cold rolled sheet and hot dipped galvanized sheets and strip contributed to a 0.7 percent overall increase in the amount of steel shipped in April, the most recent month for which data was available.