U.S. Code of Federal Regulations

Regulations most recently checked for updates: Oct 31, 2025

All TitlesTitle 40Chapter IPart 257Subpart D - Subpart D—Standards for the Disposal of Coal Combustion Residuals in Landfills and Surface Impoundments

LOCATION RESTRICTIONS
§ 257.60 - Placement above the uppermost aquifer.
§ 257.61 - Wetlands.
§ 257.62 - Fault areas.
§ 257.63 - Seismic impact zones.
§ 257.64 - Unstable areas.
§ 257.50 - Scope and purpose.
§ 257.51 - [Reserved]
§ 257.52 - Applicability of other regulations.
§ 257.53 - Definitions.

DESIGN CRITERIA
§ 257.70 - Design criteria for new CCR landfills and any lateral expansion of a CCR landfill.
§ 257.71 - Liner design criteria for existing CCR surface impoundments.
§ 257.72 - Liner design criteria for new CCR surface impoundments and any lateral expansion of a CCR surface impoundment.
§ 257.73 - Structural integrity criteria for existing CCR surface impoundments.
§ 257.74 - Structural integrity criteria for new CCR surface impoundments and any lateral expansion of a CCR surface impoundment.
§ 257.75 - Requirements for identifying CCR management units.

OPERATING CRITERIA
§ 257.80 - Air criteria.
§ 257.81 - Run-on and run-off controls for CCR landfills.
§ 257.82 - Hydrologic and hydraulic capacity requirements for CCR surface impoundments.
§ 257.83 - Inspection requirements for CCR surface impoundments.
§ 257.84 - Inspection requirements for CCR landfills.

GROUNDWATER MONITORING AND CORRECTIVE ACTION
§ 257.90 - Applicability.
§ 257.91 - Groundwater monitoring systems.
§ 257.92 - [Reserved]
§ 257.93 - Groundwater sampling and analysis requirements.
§ 257.94 - Detection monitoring program.
§ 257.95 - Assessment monitoring program.
§ 257.96 - Assessment of corrective measures.
§ 257.97 - Selection of remedy.
§ 257.98 - Implementation of the corrective action program.

CLOSURE AND POST-CLOSURE CARE
§ 257.100 - Inactive CCR surface impoundments and Legacy CCR surface impoundments.
§ 257.101 - Closure or retrofit of CCR units.
§ 257.102 - Criteria for conducting the closure or retrofit of CCR units and closure of CCR management units.
§ 257.103 - Alternative closure requirements.
§ 257.104 -

RECORDKEEPING, NOTIFICATION, AND POSTING OF INFORMATION TO THE INTERNET
§ 257.105 - Recordkeeping requirements.
§ 257.106 - Notification requirements.
§ 257.107 - Publicly accessible internet site requirements.
Appendix Appendix I - Appendix I to Part 257—Maximum Contaminant Levels (MCLs)
Appendix Appendix II - Appendix II to Part 257
Appendix Appendix III - Appendix III to Part 257—Constituents for Detection Monitoring
Appendix Appendix IV - Appendix IV to Part 257—Constituents for Assessment Monitoring
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