Gallatin implements new standards for 80% TSS removal in development projects

The Gallatin City Council meeting held on April 7, 2025, focused on environmental regulations concerning water quality management, specifically addressing the reduction of total suspended solids (TSS) in runoff. The discussion centered around the newly defined standards set by the Tennessee Department of Environment and Conservation (TDEC) in the 2021 Construction General Permit (CGP).

The meeting began with a clarification on the 80% reduction in TSS, a requirement that has become a focal point for developers and city planners. Council members expressed confusion regarding how this standard applies to properties with varying levels of water quality. It was noted that while properties with muddy water can more easily achieve the 80% reduction, those with cleaner runoff present a more complex challenge.

A representative explained that the new guidelines allow for flexibility in meeting the TSS reduction requirement. The design of stormwater management systems, such as rain gardens and bioretention ponds, plays a crucial role in achieving the necessary reduction. The discussion highlighted that the focus should not solely be on the quality of incoming water but rather on the design mechanisms that facilitate TSS removal.

The council acknowledged that the updated standards are less restrictive than previous regulations, providing developers with more options to comply with state and federal requirements. This shift aims to streamline the development process while ensuring environmental protection.

In conclusion, the meeting underscored the importance of adapting to new environmental standards and the city’s commitment to aligning with state regulations. The council plans to continue discussions on implementing these guidelines effectively, ensuring that Gallatin meets its environmental responsibilities while supporting local development.