For the second year, the National Municipal Stormwater Alliance (NMSA) is recognizing National Stormwater Day to mark the progress made in the MS4 program and the gains made in the stormwater sector, as well as celebrating the diligent efforts of stormwater professionals across the country. Additionally, National Stormwater Day was established to promote the many stormwater awareness campaigns at the state, regional and local levels that have the same goals as National Stormwater Day ...to increase the level of awareness of stormwater as a topic and a resource ad to educate the public on the value of investing in stormwater management programs and infrastructure.

This year, National Stormwater Day will be recognized on Friday, November 15, through a free webinar led by NMSA that will be held that day from 1 to 2:30 pm Eastern Time to bring together stormwater professionals to recognize leading stormwater champions, provide an overview of the newly established EPA Stormwater Centers of Excellence for Stormwater Infrastructure Technologies (CESITs) and other priorities for the Agency, share updates on the 2025 ASCE Infrastructure Report Card for Stormwater, and celebrate the Water Environment Federation (WEF) 2024 MS4 Award winning program in the City of Alexandria, Virginia.