stormwater

noun

1. (countable, uncountable)Water that is not absorbed into soil and rapidly flows downstream, increasing the level of waterways. In some municipal systems it intermixes with wastewater, increasing the volume of the latter.

   “Community groups have collected 12,000 signatures demanding that New York City permanently lower the levels of the Cannonsville, Pepacton and Neversink Reservoirs to 80 percent of capacity so that stormwater runoff can have a place to go rather than charging down the river in flash floods.”

   “Coverage under the Minnesota Pollution Control Agency (MPCA) National Pollutant Discharge Elimination System (NPDES) Construction Stormwater General Permit is required for stormwater discharges associated with construction activities disturbing one or more acres.”