Code of Federal Regulations > Title 40 > Chapter I - CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

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Regulations last checked for updates: Jun 15, 2025

Title 40 - Protection of Environment last revised: Nov 15, 2025

All TitlesTitle 40Chapter I - CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

Part 100-103 - PARTS 100-103 [RESERVED]

Part 104 [§ 104.1 - § 104.16] - PART 104—PUBLIC HEARINGS ON EFFLUENT STANDARDS FOR TOXIC POLLUTANTS

Part 105 [§ 105.1 - § 105.16] - PART 105—RECOGNITION AWARDS UNDER THE CLEAN WATER ACT

Part 108 [§ 108.1 - § 108.7] - PART 108—EMPLOYEE PROTECTION HEARINGS

Part 109 [§ 109.1 - § 109.6] - PART 109—CRITERIA FOR STATE, LOCAL AND REGIONAL OIL REMOVAL CONTINGENCY PLANS

Part 110 [§ 110.1 - § 110.6] - PART 110—DISCHARGE OF OIL

Part 112 [§ 112.1 - § 112.21] - PART 112—OIL POLLUTION PREVENTION

Part 113 [§ 113.1 - § 113.6] - PART 113—LIABILITY LIMITS FOR SMALL ONSHORE STORAGE FACILITIES

Part 116 [§ 116.1 - § 116.4] - PART 116—DESIGNATION OF HAZARDOUS SUBSTANCES

Part 117 [§ 117.1 - § 117.23] - PART 117—DETERMINATION OF REPORTABLE QUANTITIES FOR HAZARDOUS SUBSTANCES

Part 118 [§ 118.1 - § 118.13] - PART 118—CLEAN WATER ACT HAZARDOUS SUBSTANCES FACILITY RESPONSE PLANS

Part 120 [§ 120.1 - § 120.2] - PART 120—DEFINITION OF WATERS OF THE UNITED STATES

Part 121 [§ 121.1 - § 121.19] - PART 121—STATE CERTIFICATION OF ACTIVITIES REQUIRING A FEDERAL LICENSE OR PERMIT

Part 122 [§ 122.1 - § 122.64] - PART 122—EPA ADMINISTERED PERMIT PROGRAMS: THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM

Part 123 [§ 123.1 - § 123.64] - PART 123—STATE PROGRAM REQUIREMENTS

Part 124 [§ 124.1 - § 124.214] - PART 124—PROCEDURES FOR DECISIONMAKING

Part 125 [§ 125.1 - § 125.139] - PART 125—CRITERIA AND STANDARDS FOR THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM

Part 127 [§ 127.1 - § 127.27] - PART 127—NPDES ELECTRONIC REPORTING

Part 129 [§ 129.1 - § 129.105] - PART 129—TOXIC POLLUTANT EFFLUENT STANDARDS

Part 130 [§ 130.0 - § 130.16] - PART 130—WATER QUALITY PLANNING AND MANAGEMENT

Part 131 [§ 131.1 - § 131.47] - PART 131—WATER QUALITY STANDARDS

Part 132 [§ 132.1 - § 132.6] - PART 132—WATER QUALITY GUIDANCE FOR THE GREAT LAKES SYSTEM

Part 133 [§ 133.100 - § 133.105] - PART 133—SECONDARY TREATMENT REGULATION

Part 135 [§ 135.1 - § 135.13] - PART 135—PRIOR NOTICE OF CITIZEN SUITS

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