What is an MS4 stormwater?

An MS4 is a conveyance or system of conveyances that is: owned by a state, city, town, village, or other public entity that discharges to waters of the U.S., designed or used to collect or convey stormwater (e.g., storm drains, pipes, ditches), not a combined sewer, and.

What is a small MS4?

A small MS4 is any MS4 that is not already covered by the Phase I stormwater program. Small MS4s include Federally-owned systems, such as military bases.

Is an MS4 a point source?

Subject to the exceptions noted below and like all NPDES permits, MS4 permits are necessary, as a matter of federal law, only for “point source”10 discharges to jurisdictional waters.

What is an MS4 Operator?

The Phase I program for MS4s requires operators of “medium” and “large” MS4s, that is, those that generally serve populations of 100,000 or greater, to implement a stormwater management program as a means to control polluted discharges from these MS4s.

What is a Phase 2 MS4?

The Phase II program for MS4s is designed to accommodate. a general permit approach using a Notice of Intent (NOI) as the permit application. The operator of a regulated small MS4 must include in its permit application, or NOI, its chosen BMPs and measurable goals for each minimum control measure.

How do you manage storm water?

10 Ways To Manage Runoff Water

1. Add plants. Incorporate plantings, especially in areas where runoff collects.
2. Protect trees. Like other plant roots, tree roots help absorb and filter runoff.
3. Break up slabs.
4. Go permeable.
5. Catch runoff.
6. How to Divert Water Runoff from Driveway.
7. Plant a rain garden.
8. Cover soil.

Can you pump rainwater into sewer?

Gutters and gullies should only collect rainwater and connect to the rainwater drain. Wastewater pipes should not be connected to the rainwater system. If the rainwater gutters and gullies are connected to the wastewater drain, rainwater could overwhelm the drain and cause flooding.

How does a TMDL work?

A TMDL determines a pollutant reduction target and allocates load reductions necessary to the source(s) of the pollutant. Pollutant sources are characterized as either point sources that receive a wasteload allocation (WLA), or nonpoint sources that receive a load allocation (LA).