Top list · Worldwide
Water treatment startups worldwide
48 water treatment startups worldwide have raised money in rounds we track. These are the 48 that have raised the most, $407M between them, with the United States the most common home.
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ZwitterCoZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University.ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University.
Founded 2018Woburn, United States$58Mlast round Oct 2026 - 2
GradiantGradiant is a Boston-based water treatment technology company founded in 2013 as a spinout from MIT.Gradiant is a Boston-based water treatment technology company founded in 2013 as a spinout from MIT.
Founded 2013Woburn, United States$50Mlast round May 2026 - 3
MIOXMIOX develops on-site chemical generators and sustainable treatment technologies for water disinfection.MIOX develops on-site chemical generators and sustainable treatment technologies for water disinfection.
Founded 1994Albuquerque, United States$43Mlast round Oct 2015 - 4
Bluewater BioThe UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater.The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater.
Founded 2007London, United Kingdom$38Mlast round Dec 2021 - 5
AdionicsAdionics is a French Greentech company founded in 2012, specializing in Direct Lithium Extraction (DLE) and sustainable water treatment technologies.Adionics is a French Greentech company founded in 2012, specializing in Direct Lithium Extraction (DLE) and sustainable water treatment technologies.
Founded 2012Les Ulis, France$27Mlast round Nov 2023 - 6
Axine Water TechnologiesAxine Water Technologies is a leader in electrochemical oxidation technology for industrial wastewater treatment, focusing on the effective destruction of persiAxine Water Technologies is a leader in electrochemical oxidation technology for industrial wastewater treatment, focusing on the effective destruction of persi
Founded 2010Vancouver, Canada$21Mlast round Nov 2024 - 7
MaverickXMaverickX is a chemical technology company focused on developing advanced chemistries for natural resource extraction in the oil & gas, mining & metals, and watMaverickX is a chemical technology company focused on developing advanced chemistries for natural resource extraction in the oil & gas, mining & metals, and wat
Founded 2022Austin, United States$19Mlast round May 2026 - 8
AclarityAclarity, Inc.Aclarity, Inc.
Founded 2017Mansfield, United States$17Mlast round Nov 2023 - 9
HPNowPioneering the market introduction of powerful, autonomous, safe and eco-friendly water and air treatment solutions.Pioneering the market introduction of powerful, autonomous, safe and eco-friendly water and air treatment solutions.
Founded 2015Copenhagen, Denmark$15Mlast round Sept 2023 - 10
VVaterVVater is a Texas-based water technology company dedicated to addressing the water crisis through innovative purification, treatment, and reuse systems.VVater is a Texas-based water technology company dedicated to addressing the water crisis through innovative purification, treatment, and reuse systems.
Founded 2023Austin, United States$12Mlast round Sept 2026 - 11
Ecosphere TechnologiesEcosphere Technologies provides solutions for critical water recovery, treatment and recycling challenges.Ecosphere Technologies provides solutions for critical water recovery, treatment and recycling challenges.
Founded 1998Stuart, United States$10Mlast round Jul 2009 - 12
blue activityBlue Activity GmbH is a CleanTech startup based in Heidelberg, Germany, founded in 2019.Blue Activity GmbH is a CleanTech startup based in Heidelberg, Germany, founded in 2019.
Founded 2021Heidelberg, Germany$9.8Mlast round Mar 2026 - 13
IN-PIPE TECHNOLOGYIn-Pipe Technology provides engineered waste-water treatment technology and services for municipalities in the United States.In-Pipe Technology provides engineered waste-water treatment technology and services for municipalities in the United States.
Founded 1999Wood Dale, United States$7.1Mlast round Mar 2012 - 14
Jolt ElectrodesJOLT is supplying next-generation activated electrodes & protective coating solutions for hydrogen & water treatment electrolysisJOLT is supplying next-generation activated electrodes & protective coating solutions for hydrogen & water treatment electrolysis
Founded 2022Barcelona, Spain$6.5Mlast round Jun 2023 - 15
VaporeVapore offers a proprietary germ-free water vapor technology for the therapeutic treatment of a variety of medical conditions.Vapore offers a proprietary germ-free water vapor technology for the therapeutic treatment of a variety of medical conditions.
Founded 2001United States$6.1Mlast round Jan 2014 - 16
Eco World WaterEco World Water is a clean water tech company that offers wastewater processing through physical and chemical treatment process.Eco World Water is a clean water tech company that offers wastewater processing through physical and chemical treatment process.
Founded -Fort Lauderdale, United States$5.9Mlast round Apr 2026 - 17
Watercycle TechnologiesWatercycle Technologies specialized in the development of high-yield, low-cost mineral extraction, and water treatment systems.Watercycle Technologies specialized in the development of high-yield, low-cost mineral extraction, and water treatment systems.
Founded 2020Manchester, United Kingdom$5.6Mlast round Nov 2024 - 18
Salinity SolutionsSalinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector.Salinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector.
Founded 2021Birmingham, United Kingdom$5.1Mlast round Apr 2026 - 19
Ilion Water TechnologiesIlion Water Technologies specializes in innovative water treatment solutions, ensuring clean and sustainable water for communities.Ilion Water Technologies specializes in innovative water treatment solutions, ensuring clean and sustainable water for communities.
Founded -Paris, France$4.4Mlast round Mar 2026 - 20AquaMostAquaMost provides water treatment systems.
AquaMost provides water treatment systems.
Founded 2006Madison, United States$3.9Mlast round Mar 2015 - 21
IonadaIonada is a clean technology company founded in 2013, focused on air emission and water treatment technologies.Ionada is a clean technology company founded in 2013, focused on air emission and water treatment technologies.
Founded 2013Calgary, Canada$3.3Mlast round Jan 2025 - 22
CerahelixCerahelix, Inc.Cerahelix, Inc.
Founded 2011Bangor, United States$3.3Mlast round May 2020 - 23
Acuva TechnologiesAcuva’s purification system is a novel water treatment conceptAcuva’s purification system is a novel water treatment concept
Founded 2014Vancouver, Canada$3.0Mlast round May 2022 - 24
KMX TechnologiesKMX Technologies provides membrane distillation technology to separate and recover valuable chemicals and water treatment.KMX Technologies provides membrane distillation technology to separate and recover valuable chemicals and water treatment.
Founded 2020Mississauga, Canada$3.0Mlast round Nov 2025 - 25
AnodineAnodine is a French deep-tech startup based in Grenoble, founded in 2024.Anodine is a French deep-tech startup based in Grenoble, founded in 2024.
Founded 2024Grenoble, France$2.9Mlast round Jan 2026 - 26
PowerTech WaterPowerTech Water is a wastewater solution company that offers a chemical-free water treatment platform.PowerTech Water is a wastewater solution company that offers a chemical-free water treatment platform.
Founded 2014Lexington, United States$2.8Mlast round Jun 2023 - 27
PorelioPorelio is a Berlin-based deeptech startup specializing in advanced materials for industrial separation, purification, and water treatment.Porelio is a Berlin-based deeptech startup specializing in advanced materials for industrial separation, purification, and water treatment.
Founded 2025Berlin, Germany$2.7Mlast round Jul 2026 - 28
Clean ChemistryClean Chemistry is a water treatment and microbial control company founded in 2012, based in Longmont, Colorado.Clean Chemistry is a water treatment and microbial control company founded in 2012, based in Longmont, Colorado.
Founded 2012Longmont, United States$2.2Mlast round Oct 2014 - 29
FUST LabFUST Lab is a deep-tech manufacturing company based in Daejeon, South Korea, founded in 2022.FUST Lab is a deep-tech manufacturing company based in Daejeon, South Korea, founded in 2022.
Founded 2022Daejeon, South Korea$2.1Mlast round Nov 2025 - 30
GreywaterGreywater is a specialized technology company in water, wastewater and effluent treatment products.Greywater is a specialized technology company in water, wastewater and effluent treatment products.
Founded 2010Thane, India$2.0Mlast round May 2011 - 31
H2nanOSustainable, passive technology for water treatment and emissions reduction.Sustainable, passive technology for water treatment and emissions reduction.
Founded 2015Kitchener, Canada$1.6Mlast round Jun 2026 - 32
WawajiWawaji develops, designs, and manufactures water treatment equipment.Wawaji develops, designs, and manufactures water treatment equipment.
Founded 2016Hangzhou$1.6Mlast round Feb 2018 - 33
WaterwhelmWaterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment.Waterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment.
Founded 2018Edinburgh, United Kingdom$1.5Mlast round Mar 2025 - 34
Heartland Water TechnologyHeartland Water Technology provides proprietary wastewater treatment technology and services for oil and gas E&P operations.Heartland Water Technology provides proprietary wastewater treatment technology and services for oil and gas E&P operations.
Founded 2008Kirkwood, United States$1.5Mlast round Sept 2026 - 35
NyadNyad is an AI company based in Birmingham, Alabama, founded in 2024.Nyad is an AI company based in Birmingham, Alabama, founded in 2024.
Founded 2024Birmingham, United States$1.3Mlast round Mar 2026 - 36
PydroPYDRO GmbH is a German cleantech startup founded in 2016, headquartered in Rostock, with an additional location in Hamburg.PYDRO GmbH is a German cleantech startup founded in 2016, headquartered in Rostock, with an additional location in Hamburg.
Founded 2016Rostock, Germany$1.1Mlast round May 2025 - 37
NanobOxnanobOx is an Irish start-up based in Dublin, founded in 2022.nanobOx is an Irish start-up based in Dublin, founded in 2022.
Founded 2022Dublin, Ireland$953Klast round Oct 2023 - 38
Metal MorphMetal Morph is a clean technology company based in London, UK, specializing in circular resource recovery for the water and wastewater sector.Metal Morph is a clean technology company based in London, UK, specializing in circular resource recovery for the water and wastewater sector.
Founded 2025London, United Kingdom$944Klast round Aug 2026 - 39
AugenAugen provides innovative water analysis and treatment solutions, driven by a mission to ensure clean drinking water.Augen provides innovative water analysis and treatment solutions, driven by a mission to ensure clean drinking water.
Founded -Rio Grande, Brazil$835Klast round Jul 2023 - 40
NanoSepexNanoSepex is a research and development firm that focuses on water reuse and treatment through desalination technology.NanoSepex is a research and development firm that focuses on water reuse and treatment through desalination technology.
Founded 2018Bridgewater$662Klast round Jul 2019 - 41
AinwaterAInwater is a private company specializing in AI-driven water management technology.AInwater is a private company specializing in AI-driven water management technology.
Founded 2020Santiago, Chile$537Klast round Aug 2024 - 42
Island Water TechnologiesIWT develops and markets solar-powered wastewater treatment systems for domestic and industrial applications.IWT develops and markets solar-powered wastewater treatment systems for domestic and industrial applications.
Founded 2013Montague, Canada$500Klast round Feb 2018 - 43
Clearas Water RecoveryCLEARAS Water Recovery is a provider of wastewater treatment services used to recover contaminants in wastewater.CLEARAS Water Recovery is a provider of wastewater treatment services used to recover contaminants in wastewater.
Founded 2007United States$400Klast round Sept 2014 - 44AdvanceH20AdvanceH20 is an online platform that offers monitoring & data informatics platforms for water treatment.
AdvanceH20 is an online platform that offers monitoring & data informatics platforms for water treatment.
Founded -New York, United States$256Klast round Aug 2021 - 45
ChloBis WaterChloBis Water provides a desalination battery for waste water treatment.ChloBis Water provides a desalination battery for waste water treatment.
Founded 2021Madison, United States$256Klast round Dec 2021 - 46
ElateqElateq delivers an all-in-one water treatment system that simultaneously removes a wide range of water contaminants.Elateq delivers an all-in-one water treatment system that simultaneously removes a wide range of water contaminants.
Founded 2019Amherst, United States$200Klast round Mar 2024 - 47
OXbyEL TechnologiesOXbyEL Technologies is providing technical leadership in the development of a new, destructive PFAS water treatment process.OXbyEL Technologies is providing technical leadership in the development of a new, destructive PFAS water treatment process.
Founded 2018Phoenix, United States$150Klast round Dec 2023 - 48
Forward Water TechnologiesA new water treatment process to lower costs and reduce the need for wastewater disposal during oil production.A new water treatment process to lower costs and reduce the need for wastewater disposal during oil production.
Founded 2012Mississauga, Canada$6Klast round Nov 2025
Woburn, United States
London, United Kingdom
Les Ulis, France
Vancouver, Canada
Copenhagen, Denmark
Heidelberg, Germany
Barcelona, Spain
Daejeon, South Korea
Thane, India
Dublin, Ireland
Rio Grande, Brazil
Santiago, ChileCompanies whose own description names this theme, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.
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