Idaho Code § 39-127: Application of fertilizers and pesticides.

No person shall be liable for ground water contamination resulting from the application of fertilizers or pesticides if the person applies a fertilizer according to generally accepted agronomic practices, or applies a pesticide product registered under the federal insecticide, fungicide, rodenticide act according to label requirements, including precautionary statements, of the U.S. environmental protection agency, and such application of the pesticide or fertilizer is otherwise done with the proper equipment required by law, is without negligence and is in accordance with state laws.