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
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
The following documents can be found
Southern Illinois University
1830 University Press Drive
Carbondale, Illinois 62901
Hours: Monday - Friday 9:00
a.m. - 5:00 p.m.
U.S. Fish & Wildlife Service
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.
Five Year Review (4.3 MB PDF file)
2001 Final Risk Management
Decision Memorandum LM OU (3.35 MB)