NURP

The Nationwide Urban Runoff Program (NURP) was a research study conducted by the US Environmental Protection Agency (EPA) and other organizations between 1979 and 1983. It was the first comprehensive study of urban stormwater pollution across the United States.

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About NURP ponds

NURP ponds are generally wet detention ponds that capture sediment from water as it is detained http://p2library.nfesc.navy.mil/P2_Opportunity_Handbook/10-4.html

Since water is merely detained, and net pollution removal results from continuous processes, determining cumulative pollution load removal for a NURP pond generally requires a continuous simulation model rather than merely calculations to detain some design storm target. http://www.p2pays.org/ref/41/40209.pdf

NURP Best Management Practices (BMPs) are now part of broader Total Maximum Daily Load (TMDL) process that became part of USA law as part of the Clean Water Act.