Articles Tagged: MS4 Municipal Separate Storm Sewer System

Culverts are among the most common pieces of stormwater and roadway infrastructure in the United States, yet they often receive far less attention than they deserve. When properly sized and maintained, culverts allow water to move freely beneath roads, driveways, trails, and rail lines. When they ar…

One of the greatest challenges facing municipalities with Municipal Separate Storm Sewer System (MS4) permits is getting the public to care about stormwater. Residents rarely think about catch basins, roadside ditches, detention ponds, or illicit discharges until flooding occurs or a nearby stream b…

When stormwater professionals encounter an unexplained discharge, a suspicious pipe, or a drainage system that does not behave as expected, one of the most effective investigative tools available is dye testing. Used by municipalities, engineers, environmental consultants, utility operators, and reg…

One of the greatest challenges facing municipal stormwater programs is finding meaningful ways to engage residents in protecting local waterways. Public education campaigns are important, but brochures, websites, and social media posts often struggle to create lasting behavioral change. People are f…

The Adirondack Watershed Institute, often referred to as AWI, has become one of the most important environmental organizations working to protect New York’s lakes, rivers, and wetlands. Based at Paul Smith’s College in the northern Adirondacks, AWI blends scientific research, on-the-grou…

The Municipal Separate Storm Sewer System (MS4) program is one of the cornerstones of stormwater regulation in the United States. Established under the federal Clean Water Act and administered through the National Pollutant Discharge Elimination System (NPDES), the MS4 program requires municipalitie…

Most storm drain inlets quietly collect and convey runoff without attracting much attention from the public. To many residents, a storm drain is simply another opening in the curb or grate in the pavement. What many people do not realize, however, is that storm drains in most municipalities discharg…

Street sweeping rarely gets much attention. It is slow, repetitive work, often done in the early morning hours, and the equipment itself can be temperamental and expensive to maintain. Sweepers are subject to constant wear, from abrasive debris, dust, and the mechanical strain of brushes, conveyors,…

As communities look for sustainable ways to manage stormwater, bioswales have become one of the most effective and visually appealing tools in the green infrastructure toolbox. They blend natural processes with engineered design to slow, filter, and infiltrate stormwater before it reaches local wate…

Municipal Separate Storm Sewer System, or MS4, compliance is built on documentation. Whether you are demonstrating outfall inspections, tracking illicit discharge investigations, or verifying maintenance activities, a well-organized photo-log can be one of the most effective and defensible tools in …

Municipal Separate Storm Sewer System programs, commonly referred to as MS4 programs, are often viewed as regulatory obligations, while stormwater asset management is treated as an operational necessity. In reality, these two efforts are deeply interconnected. When properly aligned, a strong asset m…

A well managed stormwater program depends on accurate and complete information about every outfall in a community. Outfalls are the final discharge points where stormwater leaves the municipal system and enters a stream, lake, wetland, or other receiving water. Because these locations represent the …