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Lewisville Earns Certified-Silver iSWM Recognition for Advanced Stormwater Management

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Published on July 13, 2025
Lewisville Earns Certified-Silver iSWM Recognition for Advanced Stormwater ManagementSource: City of Lewisville

The City of Lewisville has stepped up its environmental game, gaining recognition as a Certified-Silver integrated Stormwater Management (iSWM) community by the North Central Texas Council of Governments (NCTCOG) Public Works Council. This accolade highlights Lewisville's commitment to contemporary stormwater management practices, a move aimed at not only foreseeing but actively managing the challenges posed by urban runoff and flood mitigation. The efforts are underpinned by an overhaul of the city's Drainage Criteria Manual. This update was decades in the making, with its previous edition dating back to the 1980s, as per the City of Lewisville.

To achieve the iSWM certification, a city must incorporate a laundry list of hydrologic methods, stormwater detention, and water quality improvement plans into its infrastructure. Lewisville has proven not just to meet but to exceed these requirements, having thoroughly revised and updated its approach towards hydrologic methods, flow velocities, stormwater detention, flood mitigation, downstream assessments, roadway drainage, and water quality. 

This stride towards sustainability aligns with Lewisville's 2025 strategic vision, which categorically prioritizes 'Sustainability' as a key goal. By executing an ambitious plan to safeguard its waterways and protect its communities from the increasingly unpredictable whims of climate, Lewisville positions itself as a leader among the 11 certified iSWM North Texas communities. Interested individuals and policy-watchers can review the full 'Lewisville 2025' vision plan online, establishing a precedent for environmentally conscientious urban development in North Texas.