Title 21 - WATER AND SANITATION
- Chapter 21-1 - WATER SUPPLY
- Chapter 21-2 - PUBLIC SEWER SYSTEM
- Chapter 21-3 - WATER METERS
- Chapter 21-4 - CONTESTED WATER AND SEWER BILLS
- Chapter 21-5 - WATER QUALITY AND POLLUTION
- Chapter 21-6 - RIPARIAN RIGHTS AND WATER PRIVILEGES
- Chapter 21-7 - SOLID WASTE CONTROL
- Chapter 21-8 - SOLID WASTE CONTAINER SPECIFICATIONS
- Chapter 21-9 - DISPOSAL OF CERTAIN BODY WASTES
- Chapter 21-10 - RETAIL ESTABLISHMENT CARRYOUT BAGS
- Chapter 21-11 - WATER QUALITY STANDARDS
- Chapter 21-13 - WATER QUALITY RESEARCH GRANT REGULATIONS
- Chapter 21-14 - SUBMERGED AQUATIC VEGETATION REGULATIONS
- Chapter 21-15 - DISCHARGES TO WASTEWATER SYSTEM
- Chapter 21-17 - BIOSOLIDS MANAGEMENT
- Chapter 21-18 - WELL CONSTRUCTION, MAINTENANCE, AND ABANDONMENT STANDARDS
- Chapter 21-19 - WATER QUALITY MONITORING REGULATIONS
- Chapter 21-20 - D.C. SOLID WASTE MANAGEMENT AND MULTI-MATERIAL RECYCLING
- Chapter 21-22 - WATER POLLUTION ENFORCEMENT
- Chapter 21-23 - EXPANDED POLYSTYRENE PROHIBITION
- Chapter 21-30 - PAVEMENT SEALANT REGULATIONS
- Chapter 21-40 - RETAIL RATEMAKING
- Chapter 21-41 - RETAIL WATER AND SEWER RATES CHARGES
- Chapter 21-52 - D.C. WATER AND SEWER AUTHORITY PERSONNEL REGULATIONS
- Chapter 21-53 - DISTRICT OF COLUMBIA WATER AND SEWER AUTHORITY PROCUREMENT REGULATIONS
- Chapter 21-54 - CROSS CONNECTIONS