Okla. Stat. tit. 27A, § 27A-2-2-105

A. The Department of Environmental Quality shall receive,

review, and evaluate permit applications for discharges to water

bodies for water reuse projects. The Department shall approve such

applications as comply with the applicable rules of the

Environmental Quality Board for discharges to the waters of the

State.

B. 1. Subject to subsection A of this section, the Department

shall issue permits for point-source discharges into sensitive

public and private water supplies, as defined by the rules of the

Oklahoma Water Resources Board, where such discharges do not contain

concentrations of pollutants greater than the existing

concentrations of such pollutants in the receiving water body. The

issuance of such permit by the Department shall not be considered a

violation of the anti-degradation provisions of the State’s water

quality standards.

2. Upon initial receipt of an application for a discharge

permit that is for the purpose of developing and implementing a

water reuse project, the Department shall acknowledge to the

applicant in writing or by electronic mail the date that the

Department received the application, thus initiating the period for

administrative review of the application. The Department shall

review the application in accordance with timelines for

administrative and technical review adopted by the Environmental

Quality Board.

3. Applications for point-source discharges into water bodies

designated by the Oklahoma Water Resources Board as Sensitive Public

or Private Water Supplies shall be considered Tier III permit

applications under the Uniform Environmental Permitting Act.