The Mercer County Draft Wastewater Management Plan was submitted to the NJDEP on April 7, 2011. The draft Plan includes: 1) County Summary; 2) Municipal Chapters; and 3) Municipal Chapter Maps. The municipal chapter maps include: a) Map 2M. Existing Sewered Area; b) Map 3M. Future Wastewater Service Area; and c) Map 4M. Municipal Zoning. Municipalities represented in the draft Plan include: Ewing Township, Hamilton Township, Hightstown Borough, Hopewell Borough, Hopewell Township, Lawrence Township, Princeton Borough, Princeton Township, Robbinsville Township, City of Trenton, and West Windsor Township.

East Windsor Township and Pennington Borough have adopted Wastewater Management Plans and are incorporated into the County Plan by reference. Robbinsville Township also has an adopted Plan however the municipality is seeking an amendment through this County Plan.

The County Summary, Municipal Chapters, and the Municipal Chapter Maps can be downloaded from the links below.

The Mercer County working draft sewer service area maps, which correspond to the chapter maps, are also posted on the County's interactive web mapping service. Instruction on using the service is listed below.

There are still some minor revisions to be made to the sewer service areas especially with respect to those properties currently receiving comments back from NJDEP.

The draft municipal chapters continue to serve as working drafts and are the property of Mercer County until adopted as the Mercer County Wastewater Management Plan (WMP) by the NJDEP, after the public hearing is announced in the New Jersey Register. The County and DEP will continue to receive comments up to and after the public hearing.

Comments on the draft Wastewater Management Plan, in its entirety, will also be accepted up to and during the public comment period of the Public Hearing. The public hearing will be scheduled once DEP reviews and approves the draft Wastewater Management Plan.
Mercer County Wastewater Management Plan (Draft)
Volume 1 - County Summary [PDF 315k]

Volume 2 – Municipal Chapters and Maps
Municipal Chapters:

Municipal Maps:

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Using Your Web Browser
  • Open your web browser (Windows Internet Explorer, Firefox, Google Chrome, etc.)
  • Type the following IP address in the the 'Address' window: http://151.204.177.54. Press the 'Enter' key on your keyboard.
  • On the 'Mercer County GIS' web page, click on the link, 'Mercer County Wastewater Management Plan'.
  • To open a municipal sewer service area map, click on the link, 'TownshipName'. The Web Mapping Application page will appear and the selected municipality will be visible.
  • Open the 'Map Contents' tab located on the left side of the page. Click on the '+' to display map contents.
  • Click on any of the '+' to display the map legend.
  • Use the tools in the tool bar located at the top of the page to zoom in/out, pan, identify, scale.
  • Use the identify tool to view more information about a parcel.

Click on the box next to the map layer, 'Working Draft' to view the working sewer service area boundary.

Request a Paper Copy
Please email, mwieczorek@mercercounty.org, or call, 609-989-6549, to request a paper copy of the preliminary working draft sewer service area maps.

The web mapping service allows the county to reduce the amount of expensive ink and paper needed to print paper copies. Please try to use the above electronic methods to view the maps first before requesting a paper copy. If you still need paper maps after trying the electronic version, please contact Marisa Mule’ Van Horn, mwieczorek@mercercounty.org, and maps will be printed for you.

In addition, for those using ArcGIS, .shp files can be provided if you prefer. Please contact Marisa Mule’ Van Horn, mwieczorek@mercercounty.org, with your request.

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