Pesticide Management Plan

The Idaho State Department of Agriculture (ISDA) is the lead agency in developing the Idaho Pesticide Management Plan (PMP) for ground water protection. ISDA has the authority to implement pesticide programs through Idaho state laws, ISDA rules, and a cooperative working agreement with the Environmental Protection Agency.



PMP Rule


IDAPA 02.03.01 Rules Governing Pesticide Management Plans for Ground Water Protection (PMP Rule) was passed by the Idaho Legislature in 2005. The PMP Rule outlines actions that ISDA will take in response to pesticide detections in the ground water.



Chemical Specific PMP


When pesticides are detected at elevated concentrations, a chemical specific PMP may be written. The herbicide DCPA, which is commonly referred to by the trade name DacthalŽ, has been detected at elevated levels in ground water south of Homedale. A DCPA PMP was created to help prevent further contamination of the ground water south of Homedale and throughout the state in general. Read more...



PMP Key Elements


The Idaho PMP outlines processes to protect ground water from pesticides. The key elements of the PMP are: ground water assessment and planning, ground water monitoring, prevention actions, and response to ground water contamination.

ISDA water program staff analyze pesticide monitoring data to determine where potential response measures need to be implemented. Maps have been constructed to plot pesticide detections.



PMP Response Levels


The PMP outlines responses to pesticide detections in the ground water based on the concentration of detection. Refer to the ISDA PMP brochure for the breakdown of the detection levels. The following is a summary of potential responses in the PMP:

Level 1: Notification of the well owner and water user of detection; assessment of historical data; applicator education.

Level 2: Establish area of pesticide concern; develop monitoring plan and determine likely sources; encourage voluntary best management practices; develop chemical specific PMP; pesticide use inspections.

Level 3: Establish area of pesticide restriction through rule making; additional monitoring and evaluation.

Level 4: Establish area of pesticide prohibition through rule making; evaluate regulatory actions over time.