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LM OU - Lake Monitoring Operable Unit

The Lake Monitoring Operable Unit consists of the water and sediment within the boundary of Crab Orchard Lake.  A Preliminary Screening Analysis was conducted in 2000-2001 to assess contaminants in the lake to evaluate risk.  As there is a potential risk to some ecological receptors, the USFWS is conducting further evaluation; however, that investigation will be incorporated into other OUs.

The Illinois Department of Natural Resources (IDNR) publishes advisories of fish consumption.  An advisory against the consumption of certain species of fish at Carb Orchard Lake has been in effect since the early 1980s because of elevated levels of PCBs and recently mercury.  PCB levels in fish have decreased since the original advisory.


The following documents can be found at:

Southern Illinois University        (618) 453-2818

McLafferty Annex

1830 University Press Drive

Carbondale, Illinois 62901

Hours:  Monday - Friday 9:00 a.m. - 5:00 p.m.


U.S. Fish & Wildlife Service     (618) 997-3344

Crab Orchard National Wildlife Refuge

6987 Headquarters Road

Marion, Illinois 62959

Hours:  Monday - Friday 8:00 a.m. - 4:00 p.m.

The following are downloadable documents in Adobe Acrobat format.

2006 Five Year Review (4.3 MB PDF file)

2001 Final Risk Management Decision Memorandum LM OU  (3.35 MB)

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2007 Crab Orchard National Wildlife Refuge.

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Crab Orchard National Wildlife Refuge

8588 Rt. 148
Marion, IL 62959

Phone:  (618) 997-5491  

Email:  CrabOrchardCleanup@fws.gov


Last Updated:  August 6, 2007