Skip to main content


Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial


In January 2001, the United States Environmental Protection Agency (EPA) published the “Proposed Rule to Protect Communities from Overflowing Sewers,” also known as the Sanitary Sewer Overflow (SSO) Rule. The foundation of the SSO Rule entails the assessment of capacity and implementation of management, operation and maintenance procedures in the sanitary sewer system to reduce SSOs.

The City of Phoenix sanitary sewer system consists of approximately 4,000 miles of sewer mains with approximately 85% of which are 8-inch diameter. The City of Phoenix is located in a desert climate. The sewer system has been constructed with adequate capacity for normal peak flows. Infiltration or inflow is generally minor. The majority of the SSOs are the result of grease or roots, with a small percentage attributed to construction activities or vandalism.

URS was contracted to perform a cMOM Risk Assessment for the City of Phoenix. The scope of this project included investigation of the SSOs that occurred from 1996 through 2002. Each of SSOs in this time frame was studied to determine the cause of the SSO and to develop proposed mitigation steps to prevent recurrence of the SSO.

Geographic Information Systems (GIS) were used as a basis for the study. Databases were obtained or created to organize information related to the SSOs, the sewer system, and pretreatment devices.

Document Type: Research Article


Publication date: 2004-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more