Editing Chicago River (section)

==Pollution==
The Chicago River has been highly affected by industrial and residential development with attendant changes to the quality of the water and riverbanks. Several species of freshwater fish are known to inhabit the river, including [[largemouth bass|largemouth]] and [[smallmouth bass]], [[rock bass]], [[crappie]], [[bluegill]], [[catfish]], and [[carp]]. The river also has a large population of [[crayfish]]. The South Fork of the Main (South) Branch, which was the primary sewer for the [[Union Stock Yards]] and the [[meat packing industry]], was once so polluted that it became known as [[Bubbly Creek]].<ref>{{Harvnb|Solzman|2006|p=25}}</ref> Illinois has issued advisories regarding eating fish from the river due to [[Polychlorinated biphenyl|PCB]] and [[mercury (element)|mercury]] contamination, including a "do not eat" advisory for carp more than 12&nbsp;inches long.<ref>{{cite web |title=Illinois Fish Advisory: Chicago River |work=Illinois Department of Public Health |access-date=March 17, 2008 |url=http://www.idph.state.il.us/envhealth/fishadv/chicagoriver.htm |archive-url=https://web.archive.org/web/20080314134907/http://www.idph.state.il.us/envhealth/fishadv/chicagoriver.htm |archive-date=March 14, 2008 |url-status=dead }}</ref> There are concerns that [[silver carp]] and [[bighead carp]], now [[invasive species]] in the Mississippi and [[Illinois River]]s, may reach the [[Great Lakes]] through the Chicago River.<ref>{{cite news |first=Andrew |last=Stern |title=Scientists Fear Leaping Carp To Invade US Great Lakes |url=http://www.flmnh.ufl.edu/fish/InNews/leapingcarp2006.html |agency=Reuters |date=February 20, 2006 |access-date=December 20, 2007 |archive-url=https://web.archive.org/web/20080118185054/http://www.flmnh.ufl.edu/fish/InNews/leapingcarp2006.html |archive-date=January 18, 2008 |url-status=live }}</ref> A program on the north channel next to [[Goose Island (Chicago)|Goose Island]] seeks to increase wildlife habitat through the use of floating plant islands.  The program is managed by the non-profit conservation group [[Urban Rivers]] with assistance from the [[Shedd Aquarium]].<ref>{{Cite news |url=http://www.chicagotribune.com/news/ct-met-chicago-river-wild-mile-20180612-story.html |title=A 'wild mile' on the Chicago River? It might be closer than you think |last=O'Connell |first=Patrick M. |date=June 22, 2018 |work=Chicago Tribune |access-date=June 24, 2018 |language=en-US |archive-url=https://web.archive.org/web/20180625021543/http://www.chicagotribune.com/news/ct-met-chicago-river-wild-mile-20180612-story.html |archive-date=June 25, 2018 |url-status=live }}</ref>  As with some other bodies of water in the United States, the river has seen several successful efforts to improve water quality since the passage of the [[Clean Water Act of 1972]] and related state and local efforts.<ref>{{Cite news |url=https://www.cbsnews.com/news/urban-rivers-portland-chicago/  |title=How cities like Portland and Chicago are breathing new life into their rivers |last=Axelrod |first=Jim |date=October 22, 2024 |work=CBS News |access-date=October 23, 2024|language=en-US }}</ref><ref>{{Cite news |url=https://www.nationalgeographic.com/travel/article/what-to-do-along-the-chicago-river  |title=The Chicago River was a toxic wasteland. Now it's an urban oasis. |last=Stone |first=Chelsey |date=June 22, 2024 |work=National Geographic |access-date=October 23, 2024|language=en-US }}</ref>