An interesting paragraph on the (former) Sanitary District of Chicago, as found on Wiki:
Quote:
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 northern Illinois since 1889. Although its name may imply otherwise, it is not a part of the City of Chicago's local government, but an independent agency of state government with an elected Board of Commissioners. MWRDGC's main purpose is the reclamation and treatment of wastewater and flood water abatement in Cook County to protect the health and safety of citizens and of area waterways. Perhaps its most notable achievement is the reversal of the flow of the Chicago River in 1900.