Air Quality

Water Quality

INCOG's Role
Regional Water Quality Programs
Pollution and Impairment
Total Maximum Daily Loads (TMDLs)
Resources and Links

Energy Management

Metropolitan Environmental Trust (M.e.t.)



In October 1972, Congress passed Senate Bill S. 2770 putting into law the Clean Water Act amendments of 1972. In passing this law, Congress established the national goal that, “…wherever attainable, an interim goal of water quality which provides for the protection and propagation of fish, shellfish, and wildlife, and provides for recreation in and on the water be achieved by 1 July 1983.” This statement is often referred to as the “fishable / swimmable goal” of the Clean Water Act.
The 1972 law authorized formation of planning areas in each state for the purpose of ensuring attainment of Clean Water Act goals. On September 17, 1974, Governor David Hall designated INCOG as the water quality management planning agency for Creek, Osage, Tulsa, and parts of Rogers and Wagoner Counties.

Beginning in the 1970s to the present, INCOG has managed numerous EPA grant-funded projects to collect environmental and water quality data to support the state’s 208 Water Quality Management Plan. These studies have assessed the existing water quality of area streams, employed computer modeling to calculate point source wastewater treatment plant load limits for discharge permits, and supported state agency decisions on waterbody impairment status.

Within the past 15 years, INCOG has established additional programs to address the growing problem of stormwater pollution from urban sources. INCOG’s Green Country Stormwater Alliance (GCSA) brings together many of the stormwater permitted cities and counties in Oklahoma to provide a wide range of technical support, public outreach and employee training in stormwater pollution control.