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.)



On October 18, 1972, Congress overrode a Presidential veto of Senate Bill S. 2770 putting into law the Clean Water Act amendments of 1972. In passing the 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 Act.

The Clean Water Act authorizes formation of planning areas by Governors for the purpose of ensuring attainment of Clean Water Act goals. On September 17, 1974, Governor David Hall designated INCOG as the planning agency for Creek, Osage, Tulsa, and parts of Rogers and Wagoner Counties.

In the 1970s and early 1980s, under this authority, INCOG coordinated the accumulation of vast amounts of data and analytical results and assembled these efforts into a series of reports known as the 208 Water Quality Management Plan. These studies determined the existing water quality of many streams in the area. They also calculated wastewater treatment plant load limits that could be implemented for point source dischargers that would ensure protection of water quality standards.

Over the years, as standards change, as new dischargers are added, as existing discharge facilities expand, or when waterbody features change (e.g., dams, channelization, etc.), INCOG continues to evaluate impacts of point source dischargers and assess the water quality condition of waterbodies in its planning area.

While the original plan was a collection of bound documents, today’s plan is actually comprised of electronic databases maintained by the ODEQ. There is no need to continuously update physical documents. Every permitted point source wastewater treatment facility (industrial and municipal) has an allowable wasteload designated in the 208 Water Quality Management Plan. Any increase in loads over the maximum allowed in the plan requires INCOG to perform a wasteload allocation study.