Articles Tagged: MS4 Municipal Separate Storm Sewer System

Decoding FEMA’s BRIC Program for Small MS4s
Decoding FEMA’s BRIC Program for Small MS4s
For almost five years the Building Resilient Infrastructure and Communities (BRIC) grant program served as FEMA’s flagship source of hazard-mitigation funding. It directed a steady slice of federal disaster-relief dollars toward projects that would lower future losses, and many small Municipal…continue
Understanding MS4 Expectations for a Complete Stormwater Infrastructure Record
Understanding MS4 Expectations for a Complete Stormwater Infrastructure Record
Municipal Separate Storm Sewer System (MS4) permits rest on a simple idea: you cannot manage what you have not first documented. The Environmental Protection Agency (EPA) defines an MS4 as any publicly owned system of drains, pipes, ditches, or similar conveyances that carries runoff to waters of th…continue
Safeguarding Hydric Soils from Stormwater Runoff
Safeguarding Hydric Soils from Stormwater Runoff
Hydric soils, those that form under prolonged saturation and develop anaerobic conditions, are ecological powerhouses. They store carbon, filter pollutants, support wetlands, and buffer floods. Because they are already close to saturation, even modest increases in runoff volume or velocity can trigg…continue
Understanding Stormwater Outfalls: Types and Their Environmental Impact
Understanding Stormwater Outfalls: Types and Their Environmental Impact
What is a stormwater outfall? A stormwater outfall is the point where a storm-drain system, whether pipes, ditches, or channels, discharges runoff to a receiving water such as a stream, wetland, lake, or the ocean. Regulatory guidance clarifies that simple cross-road culverts, which only pass flow b…continue
Construction Site Runoff Control: Keeping Sediment, Chemicals, and Fines Out of Your Storm Drains
Construction Site Runoff Control: Keeping Sediment, Chemicals, and Fines Out of Your Storm Drains
(In the photo above, the silt fence has been improperly installed, as you can see it was placed in loose, already excavated, soil.) Why Construction Runoff Matters A single acre of bare earth can release 10 - 20 times more sediment than the same acre in cropland, and up to 2,000 times more than a fo…continue
Soil & Water Conservation Districts (SWCDs): Your Municipality’s Unsung Stormwater Ally
Soil & Water Conservation Districts (SWCDs): Your Municipality’s Unsung Stormwater Ally
What exactly is an SWCD? Created under state law in every state and most U.S. territories, nearly 3,000 locally led Soil and Water Conservation Districts now cover almost every county in the nation. Their boards, typically a mix of farmers, municipal officials, and at-large residents, design and del…continue
Gamifying MS4 Refresher Courses to Boost Retention
Gamifying MS4 Refresher Courses to Boost Retention
Why We Need a New Approach Annual (or even quarterly) MS4 refresher courses are mandatory under the NPDES Phase II program, yet completion logs and pop-quiz scores often reveal that municipal crews quickly forget key practices such as spill-response or best management practice (BMP) housekeeping. En…continue
Good, Better, Best: Levels of Documentation That Satisfy Auditors
Good, Better, Best: Levels of Documentation That Satisfy Auditors
Why this matters Every MS4 audit, whether it’s a quick screening or a multi-day deep dive, starts with one question: “Show me the records.” Communities that can put the right document on the table (or screen) in seconds walk away with clean reports and lower stress; those that scra…continue
Keeping Pace with the 2025 MS4 Permit Updates
Keeping Pace with the 2025 MS4 Permit Updates
What Changed & Why It Matters for Your Stormwater Program Why new MS4 rules landed in 2025 EPA’s 2015 NPDES Electronic Reporting Rule (the “e-Rule”) postponed many Phase II requirements to give states time to build electronic portals. That grace period ends 21 December 2025, so…continue
Stormwater Operations Training for DPW Staff: Essential Skills for Modern Compliance and Performance
Stormwater Operations Training for DPW Staff: Essential Skills for Modern Compliance and Performance
As regulatory requirements and infrastructure demands continue to evolve, stormwater operations training for Department of Public Works (DPW) and Highway Department staff has never been more critical. Effective training ensures that personnel are prepared to safely and efficiently manage stormwater …continue
Inspecting Catch Basins and Culverts: A Critical Component of MS4 Compliance
Inspecting Catch Basins and Culverts: A Critical Component of MS4 Compliance
Proper inspection and maintenance of stormwater infrastructure, especially catch basins and culverts, is vital to ensure effective drainage performance, prevent flooding, and comply with Municipal Separate Storm Sewer System (MS4) regulations. These structures are often the first and most visible co…continue
How to Create a Drainage System Map
How to Create a Drainage System Map
An essential guide for municipalities, engineers, and field teams Mapping a drainage system is a critical task for municipalities aiming to improve stormwater management, identify illicit discharges, support maintenance planning, and ensure regulatory compliance (e.g., MS4). A well-structured draina…continue