Capacity, Management, Operations & Maintenance (CMOM)

What is CMOM?

CMOM is a comprehensive management framework for the expert operation of sanitary sewer collection systems. If you own or operate sanitary sewers, future regulations require you to develop and implement new Capacity, Management, Operations, Maintenance (CMOM), and public notification programs.

The new requirements will be a standard condition in the NPDES permits for publicly owned treatment works. Satellite sanitary collection systems will be required to obtain a permit unless they are covered by the treatment plant’s permit.


Studies by ASCE, APWA, and AMSA have determined that proper operations, preventative maintenance, and capacity management will reduce the number of sanitary sewer overflows (SSO) experienced by a sanitary collection system.


The CMOM regulation establishes five performance measures for your system. You need to:

  • Properly manage, operate, and maintain all parts of the collection system.
  • Provide adequate capacity to convey base and peak flows.
  • Take all feasible steps to stop and mitigate the impact of SSOs.
  • Provide timely notification to all potential parties affected by the SSO event.
  • Develop a written summary of your CMOM program, conduct CMOM audits, and make them available to the public.

If your system experiences SSO, you should start auditing the system immediately, and start addressing any deficiencies. Waiting for the final regulation can result in significant non-compliance issues and limit expansion of your system.

CMOM is a Resource

Having an approved CMOM will be an important resource in the management of the collection system. Reduction of SSOs may allow your community to minimize collection system costs, help encourage industrial development, and reduce public health concerns.


The result will be the development of a CMOM program for your community. The document will be the produce of close cooperation between you and Jones & Henry. Implementation of CMOM will minimize problems in the collection system and help minimize public health concerns.


CMOM will require the development of a host of auxiliary plans. These could include:

  • CMOM Program Summary
  • Collection System Audit
  • Capacity Assurance Plan
  • Training Plan
  • Safety Plan
  • Preventative Maintenance Plan
  • Overflow Emergency Plan
  • Equipment Inventories
  • Asset Management Plan
  • Facility Mapping Plan
  • Capital Improvement Plan
  • Testing and Inspection Plan

Jones & Henry offers all the services needed. Additionally we can assist you in negotiating permit conditions and in complying with permit requirements.


Our experience includes the following:

  • Dozens of Sanitary Sewer Master Plans and Facilities Plans
  • Design of Hundreds of Miles of Sanitary Sewer Construction
  • Flow Monitoring and Capacity Studies
  • Training Program Development
  • Maintenance Management System Development
  • Compliance Auditing
  • NPDES Permit Negotiations
  • Facilities Mapping
  • Maintenance of Collection Systems

Jones & Henry
Engineers, Ltd.