A joint resolution providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Environmental Protection Agency relating to "Air Plan Approval; South Dakota; Regional Haze Plan for the Second Implementation Period".

S.J.Res. 86 is a binding joint resolution that would nullify an EPA rule approved on August 28, 2025. That rule allowed South Dakota to implement a revised state air quality plan designed to meet federal requirements for improving visibility in national parks and wilderness areas. The resolution has passed committee review and is eligible for a floor vote in the Senate.

If enacted, this resolution would undo the EPA's approval of South Dakota's regional haze plan. This could affect air quality standards and visibility protections in national parks and wilderness areas within or near South Dakota. The practical impact would depend on what happens next with South Dakota's air quality planning and whether alternative approaches to meeting federal visibility requirements would be pursued.