text: Submarine outfalls exist, existed or have been considered in the following locations, among many others:
  ;Africa
  * Casablanca (Morocco).
  * Cape Town (South Africa).
  ;Asia
  * Manila Bay (Philippines).
  * Mumbai (India).
  * Mutwall ( Sri Lanka).
  * Wellawaththa (Sri Lanka).
  * Lunawa (Sri Lanka).
  ;Oceania
  * Anglesea, Victoria.
  * Geelong, Victoria.
  * Sydney (e.g., Bondi Ocean Outfall Sewer)
  ;Europe
  * Barcelona, Spain
  * Costa do Estoril (Portugal)
  * Marmara Sea near Istanbul (Turkey)
  * San Sebastián (Spain)
  * Split  (Croatia)
  * Thames Estuary downstream of London (UK)
  * Edinburgh, Scotland.
  ;North America
  * Honolulu (USA)
  * New York Bight (USA)
  * Southern California Bight (USA). and
  * Victoria, British Columbia, (Canada).
  * Santa Monica, United States (world's first) 
  * Boston, United States (world's largest) 
  * The city of San Diego used Pacific Ocean dilution of primary treated effluent into the 21st century.
  ;Latin America and the Caribbean
  * Cartagena, Colombia
  * Ipanema Beach beach from Rio de Janeiro (Brazil). This outfall, built in 1975, discharges untreated wastewater through a pipe with a diameter of 2.4m and a length of 4,775m at a depth of 27m.
  * Sosua (Dominican Republic).