stormwater

noun
storm·​wa·​ter | \ˈstȯrm-ˌwȯ-tər, -ˌwä-\

Definition of stormwater 

: rainwater produced by a storm a stormwater management system As stormwater runs over lawns, streets and other man-made surfaces, it picks up pollutants—phosphorous and nitrogen from fertilizers, bacteria from pet waste and road salt, to name a few—and carries them into local streams and lakes.— Delen Goldberg This rainfall "of biblical proportions," as the local newspaper described it, swamped the city in waist-high stormwater.— Christopher Cooper and Robert Block

First Known Use of stormwater

1848, in the meaning defined above

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The first known use of stormwater was in 1848

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