Chevron U.S.A., Inc. v. County of Monterey

Summary

The court held that Measure Z, which banned wastewater injection and impoundment and the drilling of new oil and gas wells in Monterey County's unincorporated areas, was preempted by state law. The measure directly conflicted with the statutory requirement that the state oil and gas supervisor determine which production methods are suitable and approve their use. The court affirmed the Court of Appeal's judgment; no separate opinions were filed.