Blackwater or Black Water may refer to:
Health and ecology
Blackwater (coal), liquid waste from coal preparation
Blackwater (waste), wastewater containing feces, urine, and flushwater from flush toilets Blackwater fever, an acute kidney disease Blackwater river, a classification of river with dark-colored waters
Places
Blackwater, Queensland, a coal mining area in Australia
Blackwater, Ontario, a community in the Township of Brock, Ontario, Canada
Blackwater, County Wexford, a rural village in Ireland
United Kingdom
Blackwater, Cornwall, a village
Blackwater, Dorset, a small hamlet
Blackwater, Hampshire, a small town
Blackwater railway station
Blackwater, Isle of Wight, a village
Blackwater railway station (Isle of Wight), a former station
Blackwater Reservoir, a reservoir in the Scottish Highlands
United States
Blackwater, Arizona, a census-designated place in Pinal County
Blackwater National Wildlife Refuge, a waterfowl sanctuary in Maryland
Blackwater, Missouri, a city
Blackwater, New Mexico, a power exchange between Texas and New Mexico
Blackwater Dam, a flood control dam in New Hampshire
Blackwater Draw, an archaeological site in New Mexico and a dry watercourse that extends across the Llano Estacado, Texas Blackwater Canyon, a gorge in West Virginia
Rivers
Black Water (Conon), a river in the highlands of Scotland
Blackwater River (Kerry), a river in County Kerry
River Blackwater, County Cavan, a river in the north-west of County Cavan, Ireland Munster Blackwater, a river in the counties of Kerry, Cork, and Waterford, Ireland, also known as Blackwater Kells Blackwater, a river in the counties of Cavan and Meath, Ireland, also known as the Leinster Blackwater River Blackwater (Northern Ireland), a river which runs through County Armagh and County Tyrone, Northern Ireland, as well as County Monaghan, Ireland River Blackwater, Essex, England.
Film and television
Black Water (2007 film), an Australian horror/thriller film
Black Water (2018 film), an action thriller starring Jean-Claude Van Damme and Dolph Lundgren "Blackwater" (Game of Thrones), an episode of Game of Thrones "Black Water", an episode of NCIS Blackwater (TV series), Scandinavian television drama (2023)
Books
Blackwater, a 1983 serial horror novel by Michael McDowell
Black Water (novella), a 1992 novella by Joyce Carol Oates
Blackwater (novel) or Händelser vid vatten, a 1993 novel by Kerstin Ekman
Blackwater: The Rise of the World's Most Powerful Mercenary Army, a 2007 book by Jeremy Scahill Black Water, a 2004 novel by D.J. MacHale in the Pendragon: Journal of an Adventure through Time and Space series Black Water (memoir), a 2020 memoir by David A. Robertson
Arts
Stratovarius or Black Water, a Finnish power metal band
Black Water, a monodrama for soprano and piano by Jeremy Beck, based on the novella by Joyce Carol Oates
Albums
Blackwater (Altan album), a 1996 Celtic music album
Blackwater (Altan sampler), a sampler taken from the album
Black Water (Kris Drever album) (2006) Blackwater (MOFRO album) (2001) Black Water (Tinashe album) (2013) Black Water (Blu Mar Ten album), a 2007 album by Blu Mar Ten Black Water (Rudresh Mahanthappa album), a 2002 album by Rudresh Mahanthappa Black Water, a 1989 album by Joe Zawinul
Songs
"Black Water" (song), a song by the Doobie Brothers
"Black Water", a song by Of Monsters and Men from Beneath the Skin
"Blackwater", a song by Rain Tree Crow from Rain Tree Crow
Video gaming
Blackwater (video game), a first-person shooter video game based on the company Blackwater Worldwide Blackwater, West Elizabeth, a fictional city in the Red Dead series Blackwater Industries, a fictional intergalactic company in Space Colony
Fiction
Blackwater Bay, a fictional body of water alongside King's Landing in A Song of Ice and Fire
Companies
Blackwater (company), a private American military company officially named Constellis since the merger with Triple Canopy in 2014