City develops phosphorus reduction strategies for stormwater management reveals DNR challenges

The Oshkosh Common Council is taking significant steps to address water quality challenges in the city, particularly concerning phosphorus and total suspended solids (TSS) levels. During a recent workshop, city officials discussed the complexities of meeting stringent environmental standards set by the Department of Natural Resources (DNR).

City representatives acknowledged the difficulties in reducing dissolved phosphorus levels, which are lagging behind TSS numbers. They emphasized the need for continued progress, despite the technological and financial challenges associated with implementing effective solutions. Options such as adding coagulants to stormwater ponds were mentioned, but these methods come with high costs and practical limitations, especially in a dispersed urban area.

The council is also exploring various structural practices to enhance water management, as mandated by the DNR. This includes the potential construction of a large detention pond or smaller-scale solutions, tailored to the city's specific needs. The discussions highlighted the importance of integrating these practices into the city’s five-year plan, which aims to improve water quality while accommodating future development.

In addition to addressing current water quality issues, the council is considering revisions to Chapter 14 of the municipal code, which governs development practices. This includes evaluating the impact of new and redevelopment projects on water quality over the next 30 years. The council is committed to setting realistic reduction targets for phosphorus and TSS, ensuring that Oshkosh can meet environmental standards while fostering sustainable growth.

As the city moves forward, officials are dedicated to tracking progress and adapting strategies to enhance water quality, reflecting a proactive approach to environmental stewardship in Oshkosh.