Wastewater Management Plan

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The Mercer County Wastewater Management Plan (WMP) was adopted on October 9, 2013. Click here for a copy of the public notice amending the Mercer County Water Quality Management Plan and adopting a new areawide WMP for Mercer County.

The Mercer County WMP replaces all previously adopted municipal and municipal utility authority WMPs in Mercer County as well as areas outside of Mercer served by wastewater treatment facilities located within Mercer County which have been included as part of an adopted WMP. The only exceptions are East Windsor Township, Pennington Borough, and Robbinsville Township, which have adopted municipal WMPs that still remain in effect, and which are adopted by reference as the appropriate municipal chapters in the Mercer County WMP.

A paper copy of the Mercer County Wastewater Management Plan is available for review at the Mercer County Planning Department office, 4th Floor, Room 411 of the McDade Administration Building, 640 South Broad St., Trenton, New Jersey. In addition to the downloadable files on this web page, an electronic version of the WMP is available on CD upon request for $5.

The Mercer County Planning Department is currently working on an update to the Mercer County Wastewater Management Plan, to be completed and submitted to the New Jersey Department of Environmental Protection six years from the date of adoption of the current plan, i.e., October 9, 2019.

To request a containing the adopted WMP, or for questions about the WMP update currently underway, please contact:

Andrew Lloyd
Assistant Planner
Phone: (609) 278-7197
Fax: (609) 989-6546
Email: alloyd@mercercounty.org

Mercer County Planning Department
McDade Administration Building
640 South Broad Street
P.O. Box 8068
Trenton, NJ 08650-0068

Mercer County Wastewater Management Plan

Mercer County Comments on the 2015 WQMP Proposed Rule

Mercer County WMP Amendments and Revisions 2017

Robbinsville Township

Amendment to the Mercer County WMP - Raajpo

Mercer County WMP Amendments and Revisions 2014

Robbinsville Township

Mercer County WMP Amendments and Revisions 2013


County Summary:

County Summary with Appendices A through M and Glossary and Definitions

County Summary Maps:

Environmental Analysis and Assessment

Environmental Analysis and Assessment with Appendix B – Letters of Interpretation and Habitat Suitability Determinations

Municipal Chapters:

Municipal Maps:

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