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Water & Sewer Utility
1 NW Martin Luther King Jr Blvd
Civic Center Complex, Room 104
Evansville, IN 47708
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Treatment and Fats, Oils, and Grease

Pretreatment Program

The General Pretreatment Regulations of the National Pretreatment Program require all large POTWs (those designed to treat flows of more than 5 million gallons per day) and smaller POTWs (that accept wastewater from IUs that could affect the treatment plant or its discharges) to establish local pretreatment programs. These local programs must enforce all national pretreatment standards and requirements in addition to any more stringent local requirements necessary to protect site-specific conditions at the POTW. Approximately 1,600 POTWs have developed and are implementing local pretreatment programs designed to control discharges from approximately 23,000 significant IUs.

Since the promulgation of the General Pretreatment Regulations in1983, the National Pretreatment Program has made great strides in reducing the introduction of toxic pollutants to sewer systems and to waters of the United States. In the eyes of many, the National Pretreatment Program—implemented as a partnership between EPA, states, and POTWs—is a notable success among efforts to reduce the effects of pollution on human health and the environment. Such strides can be attributed to the efforts of many federal, state, local, and industrial representatives who have been involved with developing and implementing the various aspects of the National Pretreatment Program.

The Evansville Water and Sewer Utility Pretreatment Department can be reached at (812) 426-2820.

Pretreatment and Lab Manager: Kevin Kolb,

Pretreatment Coordinator: Lloyd Lamberton,

Introduction to the National Pretreatment Program Revised, 2011

2016 Annual Pretreatment Program Report

Managing Fats, Oils and Grease

The National Pretreatment Program seeks to reduce and eliminate the amount of Fats, Oils and Grease (FOG) from food service establishments (FSE). These pollutants are known to cause obstruction in collection systems.

For questions about grease trap design, maintenance or function please contact:
Matt McBride, FOG Coordinator, Evansville Water and Sewer Utility, (812) 436-7013 or

Grease trap cleaning isn't difficult, but it can be inconvenient and time-consuming. If you do not want to do this work yourself, professional grease trap cleaning will ensure that your equipment lasts as long as possible with high functionality.

The following links offer valuable information regarding best management practices for managing food materials, grease trap design, maintenance, function and go-green initiatives. Furthermore, the EWSU Water and Sewer Manual is provided as a guide for the planning, design, and construction of sanitary sewer collection systems and water distribution systems and related facilities for projects that are initiated by private entities such as land developers, private property owners or other such parties, and that require EWSU approval and/or acceptance.

National Pretreatment Program - Controlling Fats, Oils, and Grease

Policy for Design, Installation, and Maintenance of FOG Removal Systems

Water and Sewer Manual