Political subdivisions may, when compliance with environmental standards would create excessive debt, enter into compliance schedules with the Department of Environmental Quality to prioritize compliance based on their greatest environmental or other public health and safety needs. Excessive debt is indicated when the work needed for compliance would require a capital cost or user charge significantly beyond the per-household cost for similar sized communities within the state. Penalties shall not be assessed if a political subdivision complies with the schedule authorized by the Department.
Okla. Stat. tit. 27A, § 2-3-507