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  2. Metropolitan Water Reclamation District of Greater Chicago

    en.wikipedia.org/wiki/Metropolitan_Water...

    The Metropolitan Water Reclamation District of Greater Chicago (MWRD), originally known as the Sanitary District of Chicago, is a special-purpose district chartered to operate in Cook County, Illinois since 1889. Although its name may imply otherwise, it is not a part of the City of Chicago 's local government but is created by Illinois state ...

  3. List of Illinois area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_area_codes

    773: Chicago, covers most of the geographical area of Chicago except the downtown Chicago Loop, which is in area code 312. 815/779: Northern Illinois outside of the immediate Chicago area including Joliet, Kankakee, LaSalle, DeKalb, and Rockford. Area code 815 was overlaid with area code 779 in 2007. 847/224: North and northwest suburbs of ...

  4. Water cribs in Chicago - Wikipedia

    en.wikipedia.org/wiki/Water_cribs_in_Chicago

    The Edward F. Dunne Crib was built in 1909. Named after Chicago Mayor Edward Fitzsimmons Dunne, who was in office at the time crib plans were approved, the 110-foot (34 m) diameter circular crib stands in 32 feet (9.8 m) of water and houses a 60-foot (18 m) diameter interior well connected to two new tunnels. The Dunne Crib is situated 50 feet ...

  5. Area codes 708 and 464 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_708_and_464

    Area codes 708 and 464 are telephone area codes in the North American Numbering Plan (NANP) for the southern and western suburbs of Chicago in the U.S. state of Illinois. The numbering plan area comprises most of western and southern Cook County, and eastern and southern Will County . Area code 708 was created on November 11, 1989, in a split ...

  6. Area codes 630 and 331 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_630_and_331

    On October 7, 2007, area code 331 began overlaying area code 630, making ten-digit dialing mandatory in the area. The Illinois side of the Chicago area–312/773/872, 708, 847/224, 630/331 and portions of 815/779–is one of the largest local calling areas in the United States; with few exceptions, no long-distance charges are applied from one ...

  7. Area code 312 - Wikipedia

    en.wikipedia.org/wiki/Area_code_312

    Area code 312. Coordinates: 41°52′48″N 87°37′54″W. All NPAs within Illinois. Area code 312 is a telephone area code in the North American Numbering Plan for the city of Chicago, including downtown, the Chicago Loop, and its immediate environs. The numbering plan area is completely surrounded by area code 773, which serves the rest of ...

  8. Chicago metropolitan area - Wikipedia

    en.wikipedia.org/wiki/Chicago_metropolitan_area

    The Chicago metropolitan area, also referred to as the Greater Chicago Areaand Chicagoland, is the largest metropolitan statistical areain the U.S. stateof Illinois, and the Midwest, containing the City of Chicagoalong with its surrounding suburbs and satellite cities. Encompassing 10,286 square mi (28,120 km2), the metropolitan area includes ...

  9. Community areas in Chicago - Wikipedia

    en.wikipedia.org/wiki/Community_areas_in_Chicago

    A map of the 77 community areas, broken down by region. The city of Chicago is divided into 77 community areas for statistical and planning purposes. Census data and other statistics are tied to the areas, which serve as the basis for a variety of urban planning initiatives on both the local and regional levels. The areas' boundaries do not ...