Tag: npdes permit

The National Pollutant Discharge Elimination System (NPDES) is the point source discharge permit program authorized by Section 402 of the Clean Water Act. All point source dischargers to surface waters (“Waters of the United States”) must have an NPDES permit. Permits are issued by EPA and authorized state programs.

Stormwater Monitoring

Stormwater Monitoring

The most dramatic and identifying characteristic of water is that it is always moving. Even so-called standing water is never completely static; it’s either being drawn by gravity to seep down into the earth or being agitated by warmth at the surface to rise into the air as a vapor.

Project Profile: A Challenging Site in Seattle

Project Profile: A Challenging Site in Seattle

The Interbay neighborhood of Seattle, WA, has a long history of industry. It is home to an 80-acre railway yard, the Port of Seattle’s commercial fishing fleet and cruise ship dock, a US military armory and storage facility with a long history of environmental concern, light industrial facilities, and miscellaneous

Making Every Drop Count

Making Every Drop Count

The most dramatic and identifying characteristic of water is that it is always moving. Even so-called standing water is never completely static; it’s either being drawn by gravity to seep down into the earth or being agitated by warmth at the surface to rise into the air as a vapor.

Stormwater Filtration Systems

Stormwater Filtration Systems

In recent years, the focus on stormwater mitigation in Surfside Beach, SC, has been on water quality, notes John Adair, public works director.

“The topography along the coast is very flat, so getting the water to go toward the ocean is always a challenge because you might only have very slight

Filtration Systems

Filtration Systems

In recent years, the focus on stormwater mitigation in Surfside Beach, SC, has been on water quality, notes John Adair, public works director.

“The topography along the coast is very flat, so getting the water to go toward the ocean is always a challenge because you might only have very slight

Asset Management

Asset Management

Asset management (AM) is a popular management strategy for maintaining the level of service for water and wastewater systems. These systems have clearly defined services and objectives and have been tested and regulated for much longer than stormwater systems. Compared to wastewater, stormwater less frequently receives direct treatment to remove

Protecting Storm Drains and Inlets From Sediment and Pollutants

Protecting Storm Drains and Inlets From Sediment and Pollutants

The trouble with stormwater runoff is that it travels along the ground surface and over pavement, picking up sediment and other contaminants as it goes. A well-designed surface water runoff collection and drainage system will funnel runoff from relatively large areas into individual collection points such as inlets and drains

Underground Storage and Detention Systems

Underground Storage and Detention Systems

Whether a site is undeveloped, densely developed, or somewhere in between, it can face challenges in detaining stormwater runoff. When aboveground space is at a premium, underground stormwater detention systems are an efficient way to store, detain, or infiltrate stormwater runoff while the ground above is used for parking, parks,

TMDLs in Court

TMDLs in Court

The Clean Water Rule has suffered a few blows; last week the Trump administration suspended it, pending a planned issue of its own version sometime this year, and a couple of weeks before that the Supreme Court ruled that only federal district courts, not appeals courts, should have jurisdiction in

Interception and Filtration

Interception and Filtration

The trouble with stormwater runoff is that it travels along the ground surface and over pavement, picking up sediment and other contaminants as it goes. A well-designed surface water runoff collection and drainage system will funnel runoff from relatively large areas into individual collection points such as inlets and drains

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