Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Criteria for Sewage Works Design (Orange Book)

Publication number Date Published Date Revised
98-37January 1978May 2023
VIEW NOW Criteria for Sewage Works Design (Orange Book) (Number of pages: 629) (Publication Size: 8329KB)

Orange Book Chapter T7
(89 pages) (1MB)

Trouble viewing? Try these free options.
Author(s) Water Quality Program
Description The Criteria for Sewage Works Design serves as a guide for the design of sewage collection, treatment, and reclamation systems. It provides guidance to municipal wastewater collection and treatment facilities, including engineering report requirements. It is intended for use by municipal design engineers and consulting engineers.
NOTES May 2023 - the most recent release of this manual includes updates to chapters C1 and G1, and the creation of Chapter T7 – Liner Design Guidance. T7 published as separate link.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact Water Quality Reception at 360-407-6600
Keywords guidance, guidelines, criteria, goals, health, water, sewage, sewage treatment, Criteria for Sewage, design, Orange, Orange Book
WEB PAGE Submission Of Plans And Reports For Construction Of Wastewater Facilities

Reclaimed Water Facilities Manual: The Purple Book

Frequently Asked Questions about Ultraviolet Disinfection