Nationwide Urban Runoff Program. An US EPA program aimed at characterizing the composition of storm water runoff and its impacts upon receiving waters and assessing best management practices. The program was undertaken in 28 US cities in the early 1980s.

Nationwide Urban Runoff Program. Treating stormwater to NURP recommendations involves treating water from at lease a 2.5-inch rainfall event. Ponds are a minimum of 4 feet in depth.