The Illinois River, Flint Creek, and Sager Creek are determined to be impaired for reasons that include:

Municipal Source Discharge

E coli

Enterococcus

Dissolved Oxygen

Fecal Coliform

Total Phosphorus

Turbidity

Various segments of the Illinois River are impaired from various reasons.

The source of the impairments is listed as “unknown”.

See the links below:

Appendix C

2006 Category 5 303(d) List

Category 5 - The water quality standard is not attained. The waterbody is impaired or threatened for

one or more designated uses by a pollutant(s), and requires a TMDL.

http://www.deq.state.ok.us/wqdnew/305b_303d/2006_integrated_report_appendix_c_303d_list.pdf

Full Draft Integrated Water Quality Report

http://www.deq.state.ok.us/wqdnew/305b_303d/2008_draft_integrated_report.pdf