Storm drain
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A storm drain, storm sewer, highway drain, surface water drain/sewer, or stormwater drain is infrastructure designed to drain excess rain and ground water from impervious surfaces such as paved street
Storm drain grate on the Zów Łepłans in Warsaw, Poland
Storm drain with its pipe visible beneath it due to construction work
American-style curbside storm drain receiving urban runoff
Full view of a storm drain (Ontario, Canada)
Combined sewer
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A combined sewer is a type of gravity sewer with a system of pipes, tunnels, pump stations etc. to transport sewage and urban runoff together to a sewage treatment plant or disposal site. This means t
Storm drain
…This reduces the risk of overwhelming the public sewer. Some storm drains mix stormwater (rainwater) with sewage, either intentionally in the case of combined sewers, or unintentionally. Several related terms are used differently in American and British English…
Interior of a combined sewer in Brighton, England.
Combined sewer outflow into the Anacostia River in Washington, D.C.
A medieval waste pipe in Stockholm Old Town formerly deposited sewage on the street to be flushed away by rain.
Sewage canal of a medieval house as depicted in 1447 St. Barbara Altarpiece in the National Museum in Warsaw.