What are the New DC Stormwater Requirements?

Washington, D.C.’s new stormwater regulations mandate that new developments manage four times more stormwater than was previously required. To help developers meet this regulation, the mandate includes the option to meet up to 50% of the requirement offsite by acquiring Stormwater Retention Credits (SRCs) through a marketplace managed by the D.C. Department of Energy & Environment (DOEE).

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Why is Stormwater Bad?

Stormwater runoff is the fastest growing source of freshwater pollution in the world, including in the Chesapeake Bay watershed. Stormwater pollution is caused when rainwater falls on impervious surfaces—including sidewalks, parking lots and roads—where it mixes with oil, sediment, trash and other pollutants. Stormwater then flows into our cities’ sewer systems and rivers, eventually reaching the Bay.


What Does Stormwater Retention Look Like?