Idaho Code § 42-3914
The provisions of this chapter shall not prevent the present or future use of any existing or proposed injection well which is used exclusively for disposal of irrigation waste water or of surface runoff water where such disposal does not adversely affect drinking water sources, and state or local government entities involved in highway and street construction and maintenance shall be exempt from fees and permit applications for shallow injection wells. The water resource board shall establish criteria and standards for the injection of fluids under the provisions of this chapter which shall not become valid and enforceable until adopted under provisions of the administrative procedures act, chapter 52, title 67, Idaho Code.
Idaho Code § 42-3914