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Comprehensive Wastewater Management Plan
Orleans, MA

Wright-Pierce is developing a comprehensive wastewater management plan (CWMP) for the Town of Orleans as part of an ongoing effort to address the pros and cons of establishing a municipal sewer system in this coastal Cape Cod town.

Like many Cape Cod towns, Orleans has historically utilized on-site disposal systems. While these systems largely comply with Title 5 (the state sanitary code), they are not effective in controlling the release of nitrogen and phosphorus, which has adverse effect on  the groundwater, freshwater ponds, and the poorly-flushed estuaries that surround the town. 

The CWMP assessed the need for improved wastewater management, identified feasible alternative solutions, and recommended a town-wide plan for long-term protection of these important aquatic natural resources.

Wright-Pierce worked in collaboration with the Massachusetts Estuaries Project (MEP), a state program which assesses the health and assimilative capacity of 89 embayments in southeastern Massachusetts. After conducting a thorough evaluaiton of decentralized solutions and an independent review of the MEP technical reports, Wright-Pierce established a procedure for allocating the responsibility for nitrogen control among neighboring towns contributing to the same embayment at Pleasant Bay.

Wright-Pierce coordinated all stakeholders, and facilitated all public participation, associated with development of the CWMP. Implementation of the CWMP is currently underway.

Project Highlights

Challenges

  • Degradation of poorly flushed estuaries from nitrogen overloading
  • Fragile environmental setting
  • Emerging DEP program of TMDL setting
  • Scarcity of sites for wastewater treatment and disposal
  • Need for regional solutions

Solutions

  • Comprehensive needs assessment related to sanitary disposal, water supply, pond and estuary protection and community development
  • Application of new technology for high levels of nitrogen removal
  • Intensive public consultation process
  • Thorough evaluation of decentralized solutions