Idaho Soil and Water
322 E Front Street, Suite 560
Boise, ID, 83702
Phone: 208.332.1790
Fax: 208.332.1799

TMDL Implementation Plans for Agriculture

The Conservation Commission plays a lead role in developing TMDL (Total Maximum Daily Load) Implementation Plans to reduce the amount of pollutants such as sediment, nutrients and bacteria associated with agricultural and grazing activities entering adjacent streams, lakes or rivers that are on the state 303(d) list of degraded waters.

There are more than 900 water bodies on the 303(d) list in Idaho related to agricultural sediment issues, representing 4,933 miles of streams statewide and American Falls Reservoir on the Snake River.

Commission staff determine the appropriate best management practices (BMPs) to reduce agricultural related pollutants and local conservation districts work with landowners to install those BMPs over time.

The commission works on TMDL plans year-round to improve Idaho's water quality as there is a backlog of Implementation Plans to prepare. [link to TMDL Status map] The commission recently streamlined the planning process to reduce the time required to complete its work on TMDL plans -- from 18 months per plan, to nine.

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