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.

Testing Inlet and Storm Drain Protection Devices

Testing Inlet and Storm Drain Protection Devices

Urban stormwater runoff is one of the leading causes of water pollution because it carries pollutants such as oil, grease, pesticides, fertilizer, animal waste, trash, debris, and other substances through storm drains and into lakes, rivers, and other bodies of water.

Meaningful Dry-Weather Flow Reductions

Meaningful Dry-Weather Flow Reductions

Dry-weather runoff, or non-stormwater discharge, is flow that enters the municipal separate storm sewer system (MS4) from a combination of activities including lawn watering, over-irrigation, car washing, illegal discharges, and groundwater seepage. These flows, often called “urban drool,” pose an environmental threat due in large part to the trash, sediment,

Testing the Waters

Testing the Waters

Urban stormwater runoff is one of the leading causes of water pollution because it carries pollutants such as oil, grease, pesticides, fertilizer, animal waste, trash, debris, and other substances through storm drains and into lakes, rivers, and other bodies of water.

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

Enter Your Log In Credentials
×