# Top 48 Water Treatment Startups Worldwide by Funding (2026)

> The 48 best-funded water treatment startups worldwide, ranked by total funding raised: $407M combined.

Source: https://millionrounds.com/top-lists/water-treatment-startups (Millionrounds; every figure on the page links to its filing or article)

- 1 [**ZwitterCo** ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University.](https://millionrounds.com/company/zwitterco) ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout from Tufts University. *Founded* 2018 Woburn, United States **$58M** last round Oct 2026
- 2 [**Gradiant** Gradiant is a Boston-based water treatment technology company founded in 2013 as a spinout from MIT.](https://millionrounds.com/company/gradiant) Gradiant is a Boston-based water treatment technology company founded in 2013 as a spinout from MIT. *Founded* 2013 Woburn, United States **$50M** last round May 2026
- 3 [**MIOX** MIOX develops on-site chemical generators and sustainable treatment technologies for water disinfection.](https://millionrounds.com/company/miox) MIOX develops on-site chemical generators and sustainable treatment technologies for water disinfection. *Founded* 1994 Albuquerque, United States **$43M** last round Oct 2015
- 4 [**Bluewater Bio** The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater.](https://millionrounds.com/company/bluewater-bio) The UK's fastest growing Water Company, Bluewater Bio is an award-winning specialist in the cost effective treatment of water and wastewater. *Founded* 2007 London, United Kingdom **$38M** last round Dec 2021
- 5 [**Adionics** Adionics is a French Greentech company founded in 2012, specializing in Direct Lithium Extraction (DLE) and sustainable water treatment technologies.](https://millionrounds.com/company/adionics) Adionics is a French Greentech company founded in 2012, specializing in Direct Lithium Extraction (DLE) and sustainable water treatment technologies. *Founded* 2012 Les Ulis, France **$27M** last round Nov 2023
- 6 [**Axine Water Technologies** Axine Water Technologies is a leader in electrochemical oxidation technology for industrial wastewater treatment, focusing on the effective destruction of persi](https://millionrounds.com/company/axine-water-technologies) Axine Water Technologies is a leader in electrochemical oxidation technology for industrial wastewater treatment, focusing on the effective destruction of persi *Founded* 2010 Vancouver, Canada **$21M** last round Nov 2024
- 7 [**MaverickX** MaverickX is a chemical technology company focused on developing advanced chemistries for natural resource extraction in the oil & gas, mining & metals, and wat](https://millionrounds.com/company/maverickx) MaverickX is a chemical technology company focused on developing advanced chemistries for natural resource extraction in the oil & gas, mining & metals, and wat *Founded* 2022 Austin, United States **$19M** last round May 2026
- 8 [**Aclarity** Aclarity, Inc.](https://millionrounds.com/company/aclarity) Aclarity, Inc. *Founded* 2017 Mansfield, United States **$17M** last round Nov 2023
- 9 [**HPNow** Pioneering the market introduction of powerful, autonomous, safe and eco-friendly water and air treatment solutions.](https://millionrounds.com/company/hpnow) Pioneering the market introduction of powerful, autonomous, safe and eco-friendly water and air treatment solutions. *Founded* 2015 Copenhagen, Denmark **$15M** last round Sept 2023
- 10 [**VVater** VVater is a Texas-based water technology company dedicated to addressing the water crisis through innovative purification, treatment, and reuse systems.](https://millionrounds.com/company/vvater) VVater is a Texas-based water technology company dedicated to addressing the water crisis through innovative purification, treatment, and reuse systems. *Founded* 2023 Austin, United States **$12M** last round Sept 2026
- 11 [**Ecosphere Technologies** Ecosphere Technologies provides solutions for critical water recovery, treatment and recycling challenges.](https://millionrounds.com/company/ecosphere-technologies) Ecosphere Technologies provides solutions for critical water recovery, treatment and recycling challenges. *Founded* 1998 Stuart, United States **$10M** last round Jul 2009
- 12 [**blue activity** Blue Activity GmbH is a CleanTech startup based in Heidelberg, Germany, founded in 2019.](https://millionrounds.com/company/blue-activity) Blue Activity GmbH is a CleanTech startup based in Heidelberg, Germany, founded in 2019. *Founded* 2021 Heidelberg, Germany **$9.8M** last round Mar 2026
- 13 [**IN-PIPE TECHNOLOGY** In-Pipe Technology provides engineered waste-water treatment technology and services for municipalities in the United States.](https://millionrounds.com/company/in-pipe-technology) In-Pipe Technology provides engineered waste-water treatment technology and services for municipalities in the United States. *Founded* 1999 Wood Dale, United States **$7.1M** last round Mar 2012
- 14 [**Jolt Electrodes** JOLT is supplying next-generation activated electrodes & protective coating solutions for hydrogen & water treatment electrolysis](https://millionrounds.com/company/jolt-electrodes) JOLT is supplying next-generation activated electrodes & protective coating solutions for hydrogen & water treatment electrolysis *Founded* 2022 Barcelona, Spain **$6.5M** last round Jun 2023
- 15 [**Vapore** Vapore offers a proprietary germ-free water vapor technology for the therapeutic treatment of a variety of medical conditions.](https://millionrounds.com/company/vapore) Vapore offers a proprietary germ-free water vapor technology for the therapeutic treatment of a variety of medical conditions. *Founded* 2001 United States **$6.1M** last round Jan 2014
- 16 [**Eco World Water** Eco World Water is a clean water tech company that offers wastewater processing through physical and chemical treatment process.](https://millionrounds.com/company/eco-world-water) Eco World Water is a clean water tech company that offers wastewater processing through physical and chemical treatment process. *Founded* - Fort Lauderdale, United States **$5.9M** last round Apr 2026
- 17 [**Watercycle Technologies** Watercycle Technologies specialized in the development of high-yield, low-cost mineral extraction, and water treatment systems.](https://millionrounds.com/company/watercycle-technologies) Watercycle Technologies specialized in the development of high-yield, low-cost mineral extraction, and water treatment systems. *Founded* 2020 Manchester, United Kingdom **$5.6M** last round Nov 2024
- 18 [**Salinity Solutions** Salinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector.](https://millionrounds.com/company/salinity-solutions) Salinity Solutions is an engineering technology startup based in Birmingham, UK, focused on innovative clean-tech solutions for the water treatment sector. *Founded* 2021 Birmingham, United Kingdom **$5.1M** last round Apr 2026
- 19 [**Ilion Water Technologies** Ilion Water Technologies specializes in innovative water treatment solutions, ensuring clean and sustainable water for communities.](https://millionrounds.com/company/ilion-water-technologies) Ilion Water Technologies specializes in innovative water treatment solutions, ensuring clean and sustainable water for communities. *Founded* - Paris, France **$4.4M** last round Mar 2026
- 20 [**AquaMost** AquaMost provides water treatment systems.](https://millionrounds.com/company/aquamost) AquaMost provides water treatment systems. *Founded* 2006 Madison, United States **$3.9M** last round Mar 2015
- 21 [**Ionada** Ionada is a clean technology company founded in 2013, focused on air emission and water treatment technologies.](https://millionrounds.com/company/ionada) Ionada is a clean technology company founded in 2013, focused on air emission and water treatment technologies. *Founded* 2013 Calgary, Canada **$3.3M** last round Jan 2025
- 22 [**Cerahelix** Cerahelix, Inc.](https://millionrounds.com/company/cerahelix) Cerahelix, Inc. *Founded* 2011 Bangor, United States **$3.3M** last round May 2020
- 23 [**Acuva Technologies** Acuva’s purification system is a novel water treatment concept](https://millionrounds.com/company/acuva-technologies) Acuva’s purification system is a novel water treatment concept *Founded* 2014 Vancouver, Canada **$3.0M** last round May 2022
- 24 [**KMX Technologies** KMX Technologies provides membrane distillation technology to separate and recover valuable chemicals and water treatment.](https://millionrounds.com/company/kmx-technologies) KMX Technologies provides membrane distillation technology to separate and recover valuable chemicals and water treatment. *Founded* 2020 Mississauga, Canada **$3.0M** last round Nov 2025
- 25 [**Anodine** Anodine is a French deep-tech startup based in Grenoble, founded in 2024.](https://millionrounds.com/company/anodine) Anodine is a French deep-tech startup based in Grenoble, founded in 2024. *Founded* 2024 Grenoble, France **$2.9M** last round Jan 2026
- 26 [**PowerTech Water** PowerTech Water is a wastewater solution company that offers a chemical-free water treatment platform.](https://millionrounds.com/company/powertech-water) PowerTech Water is a wastewater solution company that offers a chemical-free water treatment platform. *Founded* 2014 Lexington, United States **$2.8M** last round Jun 2023
- 27 [**Porelio** Porelio is a Berlin-based deeptech startup specializing in advanced materials for industrial separation, purification, and water treatment.](https://millionrounds.com/company/porelio) Porelio is a Berlin-based deeptech startup specializing in advanced materials for industrial separation, purification, and water treatment. *Founded* 2025 Berlin, Germany **$2.7M** last round Jul 2026
- 28 [**Clean Chemistry** Clean Chemistry is a water treatment and microbial control company founded in 2012, based in Longmont, Colorado.](https://millionrounds.com/company/clean-chemistry) Clean Chemistry is a water treatment and microbial control company founded in 2012, based in Longmont, Colorado. *Founded* 2012 Longmont, United States **$2.2M** last round Oct 2014
- 29 [**FUST Lab** FUST Lab is a deep-tech manufacturing company based in Daejeon, South Korea, founded in 2022.](https://millionrounds.com/company/fust-lab) FUST Lab is a deep-tech manufacturing company based in Daejeon, South Korea, founded in 2022. *Founded* 2022 Daejeon, South Korea **$2.1M** last round Nov 2025
- 30 [**Greywater** Greywater is a specialized technology company in water, wastewater and effluent treatment products.](https://millionrounds.com/company/greywater) Greywater is a specialized technology company in water, wastewater and effluent treatment products. *Founded* 2010 Thane, India **$2.0M** last round May 2011
- 31 [**H2nanO** Sustainable, passive technology for water treatment and emissions reduction.](https://millionrounds.com/company/h2nano) Sustainable, passive technology for water treatment and emissions reduction. *Founded* 2015 Kitchener, Canada **$1.6M** last round Jun 2026
- 32 [**Wawaji** Wawaji develops, designs, and manufactures water treatment equipment.](https://millionrounds.com/company/wawaji) Wawaji develops, designs, and manufactures water treatment equipment. *Founded* 2016 Hangzhou **$1.6M** last round Feb 2018
- 33 [**Waterwhelm** Waterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment.](https://millionrounds.com/company/waterwhelm) Waterwhelm is an award-winning company that is commercialising a patent-protected membrane technology for wastewater treatment. *Founded* 2018 Edinburgh, United Kingdom **$1.5M** last round Mar 2025
- 34 [**Heartland Water Technology** Heartland Water Technology provides proprietary wastewater treatment technology and services for oil and gas E&P operations.](https://millionrounds.com/company/heartland-water-technology) Heartland Water Technology provides proprietary wastewater treatment technology and services for oil and gas E&P operations. *Founded* 2008 Kirkwood, United States **$1.5M** last round Sept 2026
- 35 [**Nyad** Nyad is an AI company based in Birmingham, Alabama, founded in 2024.](https://millionrounds.com/company/nyad) Nyad is an AI company based in Birmingham, Alabama, founded in 2024. *Founded* 2024 Birmingham, United States **$1.3M** last round Mar 2026
- 36 [**Pydro** PYDRO GmbH is a German cleantech startup founded in 2016, headquartered in Rostock, with an additional location in Hamburg.](https://millionrounds.com/company/pydro) PYDRO GmbH is a German cleantech startup founded in 2016, headquartered in Rostock, with an additional location in Hamburg. *Founded* 2016 Rostock, Germany **$1.1M** last round May 2025
- 37 [**NanobOx** nanobOx is an Irish start-up based in Dublin, founded in 2022.](https://millionrounds.com/company/nanobox) nanobOx is an Irish start-up based in Dublin, founded in 2022. *Founded* 2022 Dublin, Ireland **$953K** last round Oct 2023
- 38 [**Metal Morph** Metal Morph is a clean technology company based in London, UK, specializing in circular resource recovery for the water and wastewater sector.](https://millionrounds.com/company/metal-morph) Metal Morph is a clean technology company based in London, UK, specializing in circular resource recovery for the water and wastewater sector. *Founded* 2025 London, United Kingdom **$944K** last round Aug 2026
- 39 [**Augen** Augen provides innovative water analysis and treatment solutions, driven by a mission to ensure clean drinking water.](https://millionrounds.com/company/augen) Augen provides innovative water analysis and treatment solutions, driven by a mission to ensure clean drinking water. *Founded* - Rio Grande, Brazil **$835K** last round Jul 2023
- 40 [**NanoSepex** NanoSepex is a research and development firm that focuses on water reuse and treatment through desalination technology.](https://millionrounds.com/company/nanosepex) NanoSepex is a research and development firm that focuses on water reuse and treatment through desalination technology. *Founded* 2018 Bridgewater **$662K** last round Jul 2019
- 41 [**Ainwater** AInwater is a private company specializing in AI-driven water management technology.](https://millionrounds.com/company/ainwater) AInwater is a private company specializing in AI-driven water management technology. *Founded* 2020 Santiago, Chile **$537K** last round Aug 2024
- 42 [**Island Water Technologies** IWT develops and markets solar-powered wastewater treatment systems for domestic and industrial applications.](https://millionrounds.com/company/island-water-technologies) IWT develops and markets solar-powered wastewater treatment systems for domestic and industrial applications. *Founded* 2013 Montague, Canada **$500K** last round Feb 2018
- 43 [**Clearas Water Recovery** CLEARAS Water Recovery is a provider of wastewater treatment services used to recover contaminants in wastewater.](https://millionrounds.com/company/clearas-water-recovery) CLEARAS Water Recovery is a provider of wastewater treatment services used to recover contaminants in wastewater. *Founded* 2007 United States **$400K** last round Sept 2014
- 44 [**AdvanceH20** AdvanceH20 is an online platform that offers monitoring & data informatics platforms for water treatment.](https://millionrounds.com/company/advanceh20) AdvanceH20 is an online platform that offers monitoring & data informatics platforms for water treatment. *Founded* - New York, United States **$256K** last round Aug 2021
- 45 [**ChloBis Water** ChloBis Water provides a desalination battery for waste water treatment.](https://millionrounds.com/company/chlobis-water) ChloBis Water provides a desalination battery for waste water treatment. *Founded* 2021 Madison, United States **$256K** last round Dec 2021
- 46 [**Elateq** Elateq delivers an all-in-one water treatment system that simultaneously removes a wide range of water contaminants.](https://millionrounds.com/company/elateq) Elateq delivers an all-in-one water treatment system that simultaneously removes a wide range of water contaminants. *Founded* 2019 Amherst, United States **$200K** last round Mar 2024
- 47 [**OXbyEL Technologies** OXbyEL Technologies is providing technical leadership in the development of a new, destructive PFAS water treatment process.](https://millionrounds.com/company/oxbyel-technologies) OXbyEL Technologies is providing technical leadership in the development of a new, destructive PFAS water treatment process. *Founded* 2018 Phoenix, United States **$150K** last round Dec 2023
- 48 [**Forward Water Technologies** A new water treatment process to lower costs and reduce the need for wastewater disposal during oil production.](https://millionrounds.com/company/forward-water-technologies) A new water treatment process to lower costs and reduce the need for wastewater disposal during oil production. *Founded* 2012 Mississauga, Canada **$6K** last round Nov 2025

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies 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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