Not to be confused with effectiveness and efficacy. For other uses, see efficiency (disambiguation). Efficiency is the (often measurable) ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without waste.
Marengo, Iowa. Marengo is a town in and the county seat of Iowa County, Iowa, United States. It has served as the county seat since August 1845, even though it was not incorporated until July 1859. The population was 2,528 in the 2010 census, a decline from 2,535 in 2000.
Zip Code 60152 is located in the state of Illinois in the Chicago metro area. Zip code 60152 is primarily located in McHenry County. Portions of 60152 are also located in DeKalb County. The official US Postal Service name for 60152 is MARENGO, Illinois. Portions of zip code 60152 are contained within or border the city limits of Marengo, IL, . Zip code 60152 is within area code 815 and area code 779.