View the Standards - Clean Water Services

Clean Water Services’ Design and Construction Standards describe administrative and technical requirements for development and construction activities that occur within CWS’ jurisdictional boundary.

The Standards address a range of topics including the design and construction of sanitary sewer and surface water management systems, erosion control methods, and natural resources protection.

D&C Standards Targeted Revision Update

CWS is considering targeted updates to the Design and Construction Standards to reflect current NPDES Permit requirements. This project is active and revisions must be completed by November 2026. Learn more at our online Open House Portal.

Design & Construction Standards (Current): R&O 19-5 as Amended by R&O 19-22, adopted November 12, 2019

Resolution & Order 19-22 & Table of Contents

Text only document, excluding Standard Details (PDF)
R&O 19-5 (PDF)
R&O 19-22 (PDF)
Table of Contents (PDF)

Chapters

Chapter 1 (PDF) – General Requirements and Administrative Provisions
Chapter 2 (PDF) – Administrative Procedures
Chapter 3 (PDF) – Sensitive Areas and Vegetated Corridors
Chapter 4 (PDF) – Runoff Treatment and Control
Chapter 5 (PDF) – Conveyance Design
Chapter 6 (PDF) – Erosion Prevention and Sediment Control
Chapter 7 (PDF) – General Construction Specifications for Conveyance Systems
Chapter 8 (PDF) – Technical Specifications for Conveyance Systems
Chapter 9 (PDF) – Wastewater Pump Stations and Force Mains
Chapter 10 (PDF) – Septic Tank Effluent Pump (STEP) Systems

Appendix A – Planting Requirements

Appendix A (PDF) – Planting Requirements

Appendix B – Standard Details

Appendix B Table of Contents (PDF)
Manholes and Appurtenances 010 – 270 (PDF)
Storm Structures 300 – 407 (PDF)
Pipes 500 – 620 (PDF)
Stormwater Management 700 – 794 (PDF)
Erosion Control 800 – 950 (PDF)
Pump Stations 1000 – 1082 – (PDF)
Flow Monitoring, Testing Forms, Computational Aids 1100 – 1285 (PDF)
AutoCAD Files
- DWG Files Detail 010 – 620 (ZIP, 41.2MB)
- DWG Files Detail 700 – 794 (ZIP, 30MB)
- DWG Files Detail 800 – 1082 (ZIP, 44.5MB)
- DWG Files Detail 1100 – 1285 (ZIP, 8.5MB)

Hydromodification Map Web Tool

Hydromodification Map web tool – This tool assists applicants in determining the necessary hydromodification approach detailed in Chapter 4 (Section 4.03), R&O 19-22. Submit comments, issues, or other feedback on the mapping tool to DnCUpdate@cleanwaterservices.org.