Idaho Administrative Code
Title IDAPA 58 - Environmental Quality, Department of
Rule 58.01.02 - WATER QUALITY STANDARDS
Section 58.01.02.055 - WATER QUALITY LIMITED WATERS AND TMDLS
Current through August 31, 2023
01. Reporting Water Body Use Support Status. After using the provisions in Section 054, and after consultation with the appropriate basin and watershed advisory groups, the Department shall identify water bodies in the appropriate category in the Integrated Report. The Integrated Report shall be published periodically by the Department in accordance with the applicable provisions of the Clean Water Act and shall be subject to public review and comment prior to submission to EPA for approval. (3-31-22)
02. Water Bodies Needing Development of a Total Maximum Daily Load (TMDL). (3-31-22)
03. Priority of TMDL Development. The priority of TMDL development for water quality limited water bodies identified in the Integrated Report shall be determined by the Director depending upon the severity of pollution and the uses of the water body, including those of unique ecological significance. In determining the severity of pollution and the effect on uses, the Director shall apply the factors set forth in Section 39-3609, Idaho Code. Water bodies identified as a high priority through this process will be the first to be targeted for development of a TMDL or equivalent process. (3-31-22)
04. Protection of Uses Prior to Completion of TMDLs. Prior to the completion of a TMDL or equivalent process for water quality limited water bodies, the Department shall take those actions required by the antidegradation policy (Section 051), the antidegradation implementation procedures (Section 052), and the provisions in Section 39-3610, Idaho Code. Nothing in this section shall be interpreted as requiring best management practices for agricultural operations which are not adopted on a voluntary basis. (3-31-22)
05. Consistency with TMDLs. Once a TMDL or equivalent process is completed, discharges of causative pollutants shall be consistent with the allocations in the TMDL. Nothing in this section shall be interpreted as requiring best management practices for agricultural operations which are not adopted on a voluntary basis. (3-31-22)
06. Pollutant Trading. Development of TMDLs or equivalent processes or interim changes under these rules may include pollutant trading with the goal of restoring water quality limited water bodies to compliance with water quality standards. (3-31-22)
07. Idaho Agriculture Pollution Abatement Plan. Use of best management practices by agricultural activities is strongly encouraged in high, medium and low priority watersheds. The Idaho Agriculture Pollution Abatement Plan is the source for best management practices for the control of nonpoint sources of pollution for agriculture. (3-31-22)