Subchapter D - WATER PROGRAMS
- Part 104 - PUBLIC HEARINGS ON EFFLUENT STANDARDS FOR TOXIC POLLUTANTS (§§ 104.1 — 104.16)
- Part 105 - RECOGNITION AWARDS UNDER THE CLEAN WATER ACT (§§ 105.7 — 105.13)
- Part 108 - EMPLOYEE PROTECTION HEARINGS (§§ 108.1 — 108.7)
- Part 109 - CRITERIA FOR STATE, LOCAL AND REGIONAL OIL REMOVAL CONTINGENCY PLANS (§§ 109.1 — 109.6)
- Part 110 - DISCHARGE OF OIL (§§ 110.1 — 110.6)
- Part 112 - OIL POLLUTION PREVENTION (§§ 112.1 — 112)
- Part 113 - LIABILITY LIMITS FOR SMALL ONSHORE STORAGE FACILITIES (§§ 113.1 — 113.6)
- Part 116 - DESIGNATION OF HAZARDOUS SUBSTANCES (§§ 116.1 — 116.4)
- Part 117 - DETERMINATION OF REPORTABLE QUANTITIES FOR HAZARDOUS SUBSTANCES (§§ 117.1 — 117.23)
- Part 118 - [Effective 5/28/2024] CLEAN WATER ACT HAZARDOUS SUBSTANCES FACILITY RESPONSE PLANS (§§ 118.1 — 118.13)
- Part 120 - DEFINITION OF WATERS OF THE UNITED STATES (§§ 120.1 — 120.2)
- Part 121 - STATE CERTIFICATION OF ACTIVITIES REQUIRING A FEDERAL LICENSE OR PERMIT (§§ 121.1 — 121.19)
- Part 122 - EPA ADMINISTERED PERMIT PROGRAMS: THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (§§ 122.1 — 122)
- Part 123 - STATE PROGRAM REQUIREMENTS (§§ 123.1 — 123.64)
- Part 124 - PROCEDURES FOR DECISIONMAKING (§§ 124.1 — 124.210)
- Part 125 - CRITERIA AND STANDARDS FOR THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (§§ 125.1 — 125.139)
- Part 127 - NPDES ELECTRONIC REPORTING (§§ 127.1 — 127)
- Part 129 - TOXIC POLLUTANT EFFLUENT STANDARDS (§§ 129.1 — 129.105)
- Part 130 - WATER QUALITY PLANNING AND MANAGEMENT (§§ 130.0 — 130.16)
- Part 131 - WATER QUALITY STANDARDS (§§ 131.1 — 131.47)
- Part 132 - WATER QUALITY GUIDANCE FOR THE GREAT LAKES SYSTEM (§ 132)
- Part 133 - SECONDARY TREATMENT REGULATION (§§ 133.100 — 133.105)
- Part 135 - PRIOR NOTICE OF CITIZEN SUITS (§§ 135.1 — 135.13)
- Part 136 - GUIDELINES ESTABLISHING TEST PROCEDURES FOR THE ANALYSIS OF POLLUTANTS (§ 136)
- Part 140 - MARINE SANITATION DEVICE STANDARD (§§ 140.1 — 140.5)
- Part 141 - NATIONAL PRIMARY DRINKING WATER REGULATIONS (§§ 141.1 — 141.861)
- Part 142 - NATIONAL PRIMARY DRINKING WATER REGULATIONS IMPLEMENTATION (§§ 142.1 — 142.307)
- Part 143 - OTHER SAFE DRINKING WATER ACT REGULATIONS (§§ 143.1 — 143.20)
- Part 144 - UNDERGROUND INJECTION CONTROL PROGRAM (§§ 144.1 — 144.84)
- Part 145 - STATE UIC PROGRAM REQUIREMENTS (§§ 145.1 — 145.58)
- Part 146 - UNDERGROUND INJECTION CONTROL PROGRAM: CRITERIA AND STANDARDS (§§ 146.1 — 146.95)
- Part 147 - STATE, TRIBAL, AND EPA-ADMINISTERED UNDERGROUND INJECTION CONTROL PROGRAMS (§§ 147.1 — 147.1901)
- Part 148 - HAZARDOUS WASTE INJECTION RESTRICTIONS (§§ 148.1 — 148.24)
- Part 149 - SOLE SOURCE AQUIFERS (§§ 149.1 — 149.111)