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Wastewater Collection System Consent Decree

On November 9, 2016, the City of Tyler approved a draft agreement with the U.S. Environmental Protection Agency (EPA) to make wastewater collection system upgrades, and to enhance the City's existing programs for inspections, maintenance and cleaning of the wastewater system. The agreement, known as a Consent Decree, became effective as of April 10, 2017 and will last for ten (10) years.

Under the Consent Decree, Tyler Water Utilities will be required to develop and implement a Capacity, Management, Operation and Maintenance (CMOM) Program. This program provides a framework for TWU to perform a comprehensive review of our wastewater collection system and enhance our current operation and maintenance practices so that we can:

  • * Better manage, operate and maintain our wastewater collection system,
  • * Better identify areas in the collection system with potential capacity constraints, and
  • * Better respond to unauthorized discharges.

Consent Decree
Effective Date 04-10-2017
Consent Decree
Click image to download document


Components of the CMOM program will include:

  • * System Cleaning:
    1. 1. Develop schedules for cleaning every pipe in the sanitary sewer system a minimum of once every ten years.
    2. 2. Identify pipe segments that may need cleaning more frequently (quarterly, biannually, annually).
  • * Condition Assessments:
    1. 1. Pipe assessments, which includes TV inspections and/or smoke testing of all 690+ miles of sewer mains in the system.
    2. 2. Manhole assessments, which includes visual and/or TV inspections of all 9000+ manholes in the sewer system.
    3. 3. Lift station assessments, which includes visual and operational inspections of every pump and force main at all 23 lift stations.
    4. 4. Develop schedules to repair or replace pipes, manholes and pumps that are identified during the assessments that are in need of repair or replacement.
  • * Capacity Assessments:
    1. 1. Update our existing sewer system hydraulic model to assess the capacity of the existing system using several different scenarios, such as existing and anticipated future wastewater flows during both dry and wet weather conditions.
    2. 2. Develop schedules to replace pipes or pumps that are identified by the model to be undersized.
  • * Develop new procedures or update existing procedures:
    1. 1. Routine and preventative maintenance of the sewer system.
    2. 2. Controlling grease and roots in the sewer system.
    3. 3. Employee training.
    4. 4. Responses to sewer overflows.


More information can be found by hovering over the "Consent Decree" tab or by clicking on the following links:

   1) History of the Sewer System
   2) Frequently Asked Questions
   3) Press Release
   4) Consent Decree Schedule
   5) Map of Discharge Locations
   6) Document Repository

  Camera Truck
Camera truck used to visually inspect the insides of sewer mains
  Vacuum Truck
Vacuum truck used to clean the insides of sewer mains