Evaluation of Onsite Wastewater Treatment System Impacts on Waterbodies in Connecticut

The contract involves funding provided by the Department of Energy and Environmental Protection (DEEP) to the Connecticut Academy of Science and Engineering, Inc. (CASE) to conduct a scientific evaluation of the impacts of onsite wastewater treatment systems (OWTS) on waterbodies in Connecticut, with a focus on Long Island Sound and its embayments. The project aims to assess the nutrient contributions from these systems to the water quality and develop appropriate mitigation strategies to address these impacts. In addition to evaluating existing data, the contract includes identifying potential implementation actions which could involve innovative or alternative wastewater treatment technologies, changes in policy or regulations, and funding mechanisms to support these efforts. The work is expected to provide a comprehensive understanding of OWTS-related nutrient pollution and practical solutions for managing and reducing their environmental effects. The solicitation was issued in November 2025, with responses due by March 2027, and involves key contacts from DEEP and CASE for administration and supplier communication.