The first single, "Left Behind", was nominated for the 2002 Grammy Award for Best Metal Performance at the 44th Grammy Awards. The second single, "My Plague", was nominated in 2003 for the same award at the 45th Grammy Awards. The single "Left Behind" peaked in the top thirty for single sales the United States and the UK. In addition, "My Plague" reached the 43rd position on the UK charts. "Iowa" was ranked sixth in the "50 Albums of the year" by "NME" in 2001. The album reached the top position on the UK Albums Chart, and the second spot on the ARIA Charts in Australia. The album reached the third spot on the "Billboard" 200 and the Finnish Albums Chart. On October 10, 2001, the album was certified Platinum in the United States. In Canada, the Canadian Recording Industry Association certified the album as Platinum, on September 5, 2001. The British Phonographic Industry has certified the album as Gold in the UK.